[{"data":1,"prerenderedAt":3437},["ShallowReactive",2],{"content-/mockup-development-log":3,"all-pages-for-dir":3415,"related-/mockup-development-log":3416,"og-image-/mockup-development-log":3436},{"id":4,"title":5,"body":6,"category":3399,"concepts":3399,"description":3400,"extension":3401,"meta":3402,"navigation":205,"ogImage":3399,"path":3403,"project_name":3399,"published":3404,"publishedAt":3405,"seo":3406,"source":3399,"stem":3407,"tags":3408,"todo":3399,"unpublished":3404,"updatedAt":3405,"__hash__":3414},"pages/2025-12/2025-12-03/mockup-development-log.md","X/Twitter DM モックアップツール開発ログ",{"type":7,"value":8,"toc":3362},"minimark",[9,13,17,28,32,55,58,61,64,79,82,90,92,95,99,252,257,280,284,459,463,481,485,538,542,563,567,730,735,743,747,900,912,916,1055,1059,1072,1076,1321,1325,1344,1348,1731,1736,1759,1764,1768,1773,1779,1785,2359,2363,2381,2386,2388,2391,2446,2448,2453,2463,2466,2604,2606,2610,2614,2661,2672,2676,2787,2795,2799,2913,2921,2925,3095,3105,3109,3166,3174,3178,3189,3191,3194,3259,3261,3264,3272,3274,3277,3280,3286,3309,3312,3336,3339,3359],[10,11,5],"h1",{"id":12},"xtwitter-dm-モックアップツール開発ログ",[14,15,16],"h2",{"id":16},"目的",[18,19,20,21,27],"p",{},"Mockly (",[22,23,24],"a",{"href":24,"rel":25},"https://www.getmockly.com/",[26],"nofollow",") を参考に、X/Twitter の DM 画面をモックアップできるツールを作成する。",[29,30,31],"h3",{"id":31},"必要な機能",[33,34,35,43,49],"ol",{},[36,37,38,42],"li",{},[39,40,41],"strong",{},"People セクション",": Sender/Receiver の名前を動的に変更できる ✅ 実装済み",[36,44,45,48],{},[39,46,47],{},"Messages セクション",": メッセージを動的に追加・編集・削除できる ✅ 実装済み",[36,50,51,54],{},[39,52,53],{},"アニメーション付き動画/GIFエクスポート",": メッセージが順番に表示されるアニメーションを保存 ⚠️ 問題あり",[56,57],"hr",{},[14,59,60],{"id":60},"現在の状態",[29,62,63],{"id":63},"動作しているもの",[65,66,67,70,73,76],"ul",{},[36,68,69],{},"People セクション（Sender/Receiver の名前変更）",[36,71,72],{},"Messages セクション（追加・編集・削除・日時変更）",[36,74,75],{},"プレビュー表示",[36,77,78],{},"プレイボタンによるアニメーションプレビュー",[29,80,81],{"id":81},"問題が発生しているもの",[65,83,84],{},[36,85,86,89],{},[39,87,88],{},"GIF/動画エクスポート",": 生成されたGIFがチラつく（正しくアニメーションしない）",[56,91],{},[14,93,94],{"id":94},"試したアプローチと失敗の記録",[29,96,98],{"id":97},"試行1-mediarecorder-canvascapturestream","試行1: MediaRecorder + canvas.captureStream() ❌",[100,101,106],"pre",{"className":102,"code":103,"language":104,"meta":105,"style":105},"language-javascript shiki shiki-themes vitesse-light vitesse-light","const stream = canvas.captureStream(30);\nconst mediaRecorder = new MediaRecorder(stream, {\n    mimeType: 'video/webm;codecs=vp9'\n});\n\n// アニメーション中にフレームをキャプチャ\nmediaRecorder.start();\nawait animateMessages();\nmediaRecorder.stop();\n","javascript","",[107,108,109,146,173,194,200,207,214,228,240],"code",{"__ignoreMap":105},[110,111,114,118,122,126,129,132,136,139,143],"span",{"class":112,"line":113},"line",1,[110,115,117],{"class":116},"stQ0i","const",[110,119,121],{"class":120},"s4oTP"," stream",[110,123,125],{"class":124},"shFtX"," =",[110,127,128],{"class":120}," canvas",[110,130,131],{"class":124},".",[110,133,135],{"class":134},"senZ8","captureStream",[110,137,138],{"class":124},"(",[110,140,142],{"class":141},"sM54T","30",[110,144,145],{"class":124},");\n",[110,147,149,151,154,156,159,162,164,167,170],{"class":112,"line":148},2,[110,150,117],{"class":116},[110,152,153],{"class":120}," mediaRecorder",[110,155,125],{"class":124},[110,157,158],{"class":116}," new",[110,160,161],{"class":134}," MediaRecorder",[110,163,138],{"class":124},[110,165,166],{"class":120},"stream",[110,168,169],{"class":124},",",[110,171,172],{"class":124}," {\n",[110,174,176,180,183,187,191],{"class":112,"line":175},3,[110,177,179],{"class":178},"sz8Xr","    mimeType",[110,181,182],{"class":124},":",[110,184,186],{"class":185},"sMJiu"," '",[110,188,190],{"class":189},"sdGka","video/webm;codecs=vp9",[110,192,193],{"class":185},"'\n",[110,195,197],{"class":112,"line":196},4,[110,198,199],{"class":124},"});\n",[110,201,203],{"class":112,"line":202},5,[110,204,206],{"emptyLinePlaceholder":205},true,"\n",[110,208,210],{"class":112,"line":209},6,[110,211,213],{"class":212},"sxvE3","// アニメーション中にフレームをキャプチャ\n",[110,215,217,220,222,225],{"class":112,"line":216},7,[110,218,219],{"class":120},"mediaRecorder",[110,221,131],{"class":124},[110,223,224],{"class":134},"start",[110,226,227],{"class":124},"();\n",[110,229,231,235,238],{"class":112,"line":230},8,[110,232,234],{"class":233},"sHkkW","await",[110,236,237],{"class":134}," animateMessages",[110,239,227],{"class":124},[110,241,243,245,247,250],{"class":112,"line":242},9,[110,244,219],{"class":120},[110,246,131],{"class":124},[110,248,249],{"class":134},"stop",[110,251,227],{"class":124},[18,253,254,182],{},[39,255,256],{},"失敗の理由",[65,258,259,265,271,274],{},[36,260,261,264],{},[107,262,263],{},"html2canvas","が非同期で遅い（1フレーム数十〜数百ms）",[36,266,267,270],{},[107,268,269],{},"captureStream()"," はcanvasへの描画を検出してフレームを生成するが、タイミングが不安定",[36,272,273],{},"アニメーションとフレームキャプチャが同期しない",[36,275,276,279],{},[39,277,278],{},"結果",": 1秒程度の動画しか生成されない",[29,281,283],{"id":282},"試行2-プリキャプチャ-sleep-で描画","試行2: プリキャプチャ + sleep() で描画 ❌",[100,285,287],{"className":102,"code":286,"language":104,"meta":105,"style":105},"// 全フレームを事前にキャプチャ\nconst frames = [];\nfor (...) {\n    frameCanvas = await html2canvas(...);\n    frames.push(frameCanvas);\n}\n\n// 録画しながらフレームを描画\nmediaRecorder.start();\nfor (const frame of frames) {\n    ctx.drawImage(frame, 0, 0);\n    await sleep(33); // 30fps\n}\nmediaRecorder.stop();\n",[107,288,289,294,306,316,332,349,354,358,363,373,396,423,443,448],{"__ignoreMap":105},[110,290,291],{"class":112,"line":113},[110,292,293],{"class":212},"// 全フレームを事前にキャプチャ\n",[110,295,296,298,301,303],{"class":112,"line":148},[110,297,117],{"class":116},[110,299,300],{"class":120}," frames",[110,302,125],{"class":124},[110,304,305],{"class":124}," [];\n",[110,307,308,311,314],{"class":112,"line":175},[110,309,310],{"class":233},"for",[110,312,313],{"class":124}," (...)",[110,315,172],{"class":124},[110,317,318,321,323,326,329],{"class":112,"line":196},[110,319,320],{"class":120},"    frameCanvas",[110,322,125],{"class":124},[110,324,325],{"class":233}," await",[110,327,328],{"class":134}," html2canvas",[110,330,331],{"class":124},"(...);\n",[110,333,334,337,339,342,344,347],{"class":112,"line":202},[110,335,336],{"class":120},"    frames",[110,338,131],{"class":124},[110,340,341],{"class":134},"push",[110,343,138],{"class":124},[110,345,346],{"class":120},"frameCanvas",[110,348,145],{"class":124},[110,350,351],{"class":112,"line":209},[110,352,353],{"class":124},"}\n",[110,355,356],{"class":112,"line":216},[110,357,206],{"emptyLinePlaceholder":205},[110,359,360],{"class":112,"line":230},[110,361,362],{"class":212},"// 録画しながらフレームを描画\n",[110,364,365,367,369,371],{"class":112,"line":242},[110,366,219],{"class":120},[110,368,131],{"class":124},[110,370,224],{"class":134},[110,372,227],{"class":124},[110,374,376,378,381,383,386,389,391,394],{"class":112,"line":375},10,[110,377,310],{"class":233},[110,379,380],{"class":124}," (",[110,382,117],{"class":116},[110,384,385],{"class":120}," frame",[110,387,388],{"class":116}," of",[110,390,300],{"class":120},[110,392,393],{"class":124},")",[110,395,172],{"class":124},[110,397,399,402,404,407,409,412,414,417,419,421],{"class":112,"line":398},11,[110,400,401],{"class":120},"    ctx",[110,403,131],{"class":124},[110,405,406],{"class":134},"drawImage",[110,408,138],{"class":124},[110,410,411],{"class":120},"frame",[110,413,169],{"class":124},[110,415,416],{"class":141}," 0",[110,418,169],{"class":124},[110,420,416],{"class":141},[110,422,145],{"class":124},[110,424,426,429,432,434,437,440],{"class":112,"line":425},12,[110,427,428],{"class":233},"    await",[110,430,431],{"class":134}," sleep",[110,433,138],{"class":124},[110,435,436],{"class":141},"33",[110,438,439],{"class":124},");",[110,441,442],{"class":212}," // 30fps\n",[110,444,446],{"class":112,"line":445},13,[110,447,353],{"class":124},[110,449,451,453,455,457],{"class":112,"line":450},14,[110,452,219],{"class":120},[110,454,131],{"class":124},[110,456,249],{"class":134},[110,458,227],{"class":124},[18,460,461,182],{},[39,462,256],{},[65,464,465,471,476],{},[36,466,467,470],{},[107,468,469],{},"sleep()"," はJavaScript実行を止めるだけで、ブラウザのレンダリングサイクルとは同期しない",[36,472,473,475],{},[107,474,269],{}," がフレームを正しく検出しない",[36,477,478,480],{},[39,479,278],{},": 静止画がチカチカするだけ",[29,482,484],{"id":483},"試行3-gifjs-ライブラリ","試行3: gif.js ライブラリ ❌",[100,486,488],{"className":102,"code":487,"language":104,"meta":105,"style":105},"const gif = new GIF({\n    workers: 2,\n    workerScript: 'https://cdnjs.cloudflare.com/...'\n});\n",[107,489,490,507,520,534],{"__ignoreMap":105},[110,491,492,494,497,499,501,504],{"class":112,"line":113},[110,493,117],{"class":116},[110,495,496],{"class":120}," gif",[110,498,125],{"class":124},[110,500,158],{"class":116},[110,502,503],{"class":134}," GIF",[110,505,506],{"class":124},"({\n",[110,508,509,512,514,517],{"class":112,"line":148},[110,510,511],{"class":178},"    workers",[110,513,182],{"class":124},[110,515,516],{"class":141}," 2",[110,518,519],{"class":124},",\n",[110,521,522,525,527,529,532],{"class":112,"line":175},[110,523,524],{"class":178},"    workerScript",[110,526,182],{"class":124},[110,528,186],{"class":185},[110,530,531],{"class":189},"https://cdnjs.cloudflare.com/...",[110,533,193],{"class":185},[110,535,536],{"class":112,"line":196},[110,537,199],{"class":124},[18,539,540,182],{},[39,541,256],{},[65,543,544,551,557],{},[36,545,546,547,550],{},"Web Workerを使用するが、",[107,548,549],{},"file://","プロトコルでは外部Workerスクリプトを読み込めない",[36,552,553,554],{},"CORSエラー: ",[107,555,556],{},"Failed to construct 'Worker'",[36,558,559,560,562],{},"ローカルにWorkerをダウンロードしても、",[107,561,549],{}," からは読み込み不可",[29,564,566],{"id":565},"試行4-gifenc-ライブラリworker不要-️-部分的成功","試行4: gifenc ライブラリ（Worker不要） ⚠️ 部分的成功",[100,568,570],{"className":102,"code":569,"language":104,"meta":105,"style":105},"const { GIFEncoder, quantize, applyPalette } = gifenc;\nconst gif = GIFEncoder();\n\n// フレームごとにパレットを作成\nfor (const frame of frames) {\n    const palette = quantize(frameData, 256);\n    const index = applyPalette(frameData, palette);\n    gif.writeFrame(index, width, height, { palette, delay });\n}\n",[107,571,572,603,615,619,624,642,666,687,726],{"__ignoreMap":105},[110,573,574,576,579,582,584,587,589,592,595,597,600],{"class":112,"line":113},[110,575,117],{"class":116},[110,577,578],{"class":124}," {",[110,580,581],{"class":120}," GIFEncoder",[110,583,169],{"class":124},[110,585,586],{"class":120}," quantize",[110,588,169],{"class":124},[110,590,591],{"class":120}," applyPalette",[110,593,594],{"class":124}," }",[110,596,125],{"class":124},[110,598,599],{"class":120}," gifenc",[110,601,602],{"class":124},";\n",[110,604,605,607,609,611,613],{"class":112,"line":148},[110,606,117],{"class":116},[110,608,496],{"class":120},[110,610,125],{"class":124},[110,612,581],{"class":134},[110,614,227],{"class":124},[110,616,617],{"class":112,"line":175},[110,618,206],{"emptyLinePlaceholder":205},[110,620,621],{"class":112,"line":196},[110,622,623],{"class":212},"// フレームごとにパレットを作成\n",[110,625,626,628,630,632,634,636,638,640],{"class":112,"line":202},[110,627,310],{"class":233},[110,629,380],{"class":124},[110,631,117],{"class":116},[110,633,385],{"class":120},[110,635,388],{"class":116},[110,637,300],{"class":120},[110,639,393],{"class":124},[110,641,172],{"class":124},[110,643,644,647,650,652,654,656,659,661,664],{"class":112,"line":209},[110,645,646],{"class":116},"    const",[110,648,649],{"class":120}," palette",[110,651,125],{"class":124},[110,653,586],{"class":134},[110,655,138],{"class":124},[110,657,658],{"class":120},"frameData",[110,660,169],{"class":124},[110,662,663],{"class":141}," 256",[110,665,145],{"class":124},[110,667,668,670,673,675,677,679,681,683,685],{"class":112,"line":216},[110,669,646],{"class":116},[110,671,672],{"class":120}," index",[110,674,125],{"class":124},[110,676,591],{"class":134},[110,678,138],{"class":124},[110,680,658],{"class":120},[110,682,169],{"class":124},[110,684,649],{"class":120},[110,686,145],{"class":124},[110,688,689,692,694,697,699,702,704,707,709,712,714,716,718,720,723],{"class":112,"line":230},[110,690,691],{"class":120},"    gif",[110,693,131],{"class":124},[110,695,696],{"class":134},"writeFrame",[110,698,138],{"class":124},[110,700,701],{"class":120},"index",[110,703,169],{"class":124},[110,705,706],{"class":120}," width",[110,708,169],{"class":124},[110,710,711],{"class":120}," height",[110,713,169],{"class":124},[110,715,578],{"class":124},[110,717,649],{"class":120},[110,719,169],{"class":124},[110,721,722],{"class":120}," delay",[110,724,725],{"class":124}," });\n",[110,727,728],{"class":112,"line":242},[110,729,353],{"class":124},[18,731,732,182],{},[39,733,734],{},"問題",[65,736,737,740],{},[36,738,739],{},"フレームごとに異なるパレット（256色）を使用",[36,741,742],{},"色が微妙に変わり、GIFがチラつく",[29,744,746],{"id":745},"試行5-共有パレット-シンプル化","試行5: 共有パレット + シンプル化 ❌",[100,748,750],{"className":102,"code":749,"language":104,"meta":105,"style":105},"// 最終フレームからパレットを作成\nconst palette = quantize(finalFrameData, 256);\n\n// 全フレームで同じパレットを使用\nfor (const frame of frames) {\n    const index = applyPalette(frameData, palette);\n    gif.writeFrame(index, width, height, {\n        palette: i === 0 ? palette : null,\n        delay: frame.delay\n    });\n}\n",[107,751,752,757,778,782,787,805,825,849,877,891,896],{"__ignoreMap":105},[110,753,754],{"class":112,"line":113},[110,755,756],{"class":212},"// 最終フレームからパレットを作成\n",[110,758,759,761,763,765,767,769,772,774,776],{"class":112,"line":148},[110,760,117],{"class":116},[110,762,649],{"class":120},[110,764,125],{"class":124},[110,766,586],{"class":134},[110,768,138],{"class":124},[110,770,771],{"class":120},"finalFrameData",[110,773,169],{"class":124},[110,775,663],{"class":141},[110,777,145],{"class":124},[110,779,780],{"class":112,"line":175},[110,781,206],{"emptyLinePlaceholder":205},[110,783,784],{"class":112,"line":196},[110,785,786],{"class":212},"// 全フレームで同じパレットを使用\n",[110,788,789,791,793,795,797,799,801,803],{"class":112,"line":202},[110,790,310],{"class":233},[110,792,380],{"class":124},[110,794,117],{"class":116},[110,796,385],{"class":120},[110,798,388],{"class":116},[110,800,300],{"class":120},[110,802,393],{"class":124},[110,804,172],{"class":124},[110,806,807,809,811,813,815,817,819,821,823],{"class":112,"line":209},[110,808,646],{"class":116},[110,810,672],{"class":120},[110,812,125],{"class":124},[110,814,591],{"class":134},[110,816,138],{"class":124},[110,818,658],{"class":120},[110,820,169],{"class":124},[110,822,649],{"class":120},[110,824,145],{"class":124},[110,826,827,829,831,833,835,837,839,841,843,845,847],{"class":112,"line":216},[110,828,691],{"class":120},[110,830,131],{"class":124},[110,832,696],{"class":134},[110,834,138],{"class":124},[110,836,701],{"class":120},[110,838,169],{"class":124},[110,840,706],{"class":120},[110,842,169],{"class":124},[110,844,711],{"class":120},[110,846,169],{"class":124},[110,848,172],{"class":124},[110,850,851,854,856,859,862,864,867,869,872,875],{"class":112,"line":230},[110,852,853],{"class":178},"        palette",[110,855,182],{"class":124},[110,857,858],{"class":120}," i",[110,860,861],{"class":116}," ===",[110,863,416],{"class":141},[110,865,866],{"class":116}," ?",[110,868,649],{"class":120},[110,870,871],{"class":116}," :",[110,873,874],{"class":116}," null",[110,876,519],{"class":124},[110,878,879,882,884,886,888],{"class":112,"line":242},[110,880,881],{"class":178},"        delay",[110,883,182],{"class":124},[110,885,385],{"class":120},[110,887,131],{"class":124},[110,889,890],{"class":120},"delay\n",[110,892,893],{"class":112,"line":375},[110,894,895],{"class":124},"    });\n",[110,897,898],{"class":112,"line":398},[110,899,353],{"class":124},[18,901,902,904,905,907,908,911],{},[39,903,256],{},": GIF自体は改善されたが、",[107,906,263],{},"がinline styleの",[107,909,910],{},"opacity: 0","を正しくキャプチャしない問題が根本的に残る",[29,913,915],{"id":914},"試行6-webm動画-mediarecorder","試行6: WebM動画 + MediaRecorder ❌",[100,917,919],{"className":102,"code":918,"language":104,"meta":105,"style":105},"const stream = canvas.captureStream(0);\nconst mediaRecorder = new MediaRecorder(stream, {\n    mimeType: 'video/webm;codecs=vp9'\n});\n\n// フレームごとに描画\nfor (const frame of frames) {\n    ctx.drawImage(frame, 0, 0);\n    videoTrack.requestFrame();\n    await sleep(33);\n}\n",[107,920,921,942,962,974,978,982,987,1005,1027,1039,1051],{"__ignoreMap":105},[110,922,923,925,927,929,931,933,935,937,940],{"class":112,"line":113},[110,924,117],{"class":116},[110,926,121],{"class":120},[110,928,125],{"class":124},[110,930,128],{"class":120},[110,932,131],{"class":124},[110,934,135],{"class":134},[110,936,138],{"class":124},[110,938,939],{"class":141},"0",[110,941,145],{"class":124},[110,943,944,946,948,950,952,954,956,958,960],{"class":112,"line":148},[110,945,117],{"class":116},[110,947,153],{"class":120},[110,949,125],{"class":124},[110,951,158],{"class":116},[110,953,161],{"class":134},[110,955,138],{"class":124},[110,957,166],{"class":120},[110,959,169],{"class":124},[110,961,172],{"class":124},[110,963,964,966,968,970,972],{"class":112,"line":175},[110,965,179],{"class":178},[110,967,182],{"class":124},[110,969,186],{"class":185},[110,971,190],{"class":189},[110,973,193],{"class":185},[110,975,976],{"class":112,"line":196},[110,977,199],{"class":124},[110,979,980],{"class":112,"line":202},[110,981,206],{"emptyLinePlaceholder":205},[110,983,984],{"class":112,"line":209},[110,985,986],{"class":212},"// フレームごとに描画\n",[110,988,989,991,993,995,997,999,1001,1003],{"class":112,"line":216},[110,990,310],{"class":233},[110,992,380],{"class":124},[110,994,117],{"class":116},[110,996,385],{"class":120},[110,998,388],{"class":116},[110,1000,300],{"class":120},[110,1002,393],{"class":124},[110,1004,172],{"class":124},[110,1006,1007,1009,1011,1013,1015,1017,1019,1021,1023,1025],{"class":112,"line":230},[110,1008,401],{"class":120},[110,1010,131],{"class":124},[110,1012,406],{"class":134},[110,1014,138],{"class":124},[110,1016,411],{"class":120},[110,1018,169],{"class":124},[110,1020,416],{"class":141},[110,1022,169],{"class":124},[110,1024,416],{"class":141},[110,1026,145],{"class":124},[110,1028,1029,1032,1034,1037],{"class":112,"line":242},[110,1030,1031],{"class":120},"    videoTrack",[110,1033,131],{"class":124},[110,1035,1036],{"class":134},"requestFrame",[110,1038,227],{"class":124},[110,1040,1041,1043,1045,1047,1049],{"class":112,"line":375},[110,1042,428],{"class":233},[110,1044,431],{"class":134},[110,1046,138],{"class":124},[110,1048,436],{"class":141},[110,1050,145],{"class":124},[110,1052,1053],{"class":112,"line":398},[110,1054,353],{"class":124},[18,1056,1057,182],{},[39,1058,256],{},[65,1060,1061,1069],{},[36,1062,1063,1065,1066,1068],{},[107,1064,263],{}," が ",[107,1067,910],{}," の要素を「見える状態」でキャプチャしてしまう",[36,1070,1071],{},"日付だけアニメーションして、メッセージは最初から全部見える状態",[29,1073,1075],{"id":1074},"試行7-プログレッシブdom構築-️-部分的成功","試行7: プログレッシブDOM構築 ⚠️ 部分的成功",[100,1077,1079],{"className":102,"code":1078,"language":104,"meta":105,"style":105},"// 最初にメッセージエリアを空にする\npreviewMessages.innerHTML = '';\n\n// 要素を一つずつ追加しながらキャプチャ\nfor (const element of elementsToAdd) {\n    const newElement = createElementFromHTML(element.content);\n    newElement.style.opacity = '0';\n    previewMessages.appendChild(newElement);\n\n    // フェードインアニメーションをキャプチャ\n    for (let step = 0; step \u003C= 5; step++) {\n        newElement.style.opacity = String(step / 5);\n        frameCanvas = await html2canvas(previewDeviceEl);\n        frames.push(frameCanvas);\n    }\n}\n",[107,1080,1081,1086,1103,1107,1112,1132,1156,1182,1199,1203,1208,1247,1277,1295,1310,1316],{"__ignoreMap":105},[110,1082,1083],{"class":112,"line":113},[110,1084,1085],{"class":212},"// 最初にメッセージエリアを空にする\n",[110,1087,1088,1091,1093,1096,1098,1101],{"class":112,"line":148},[110,1089,1090],{"class":120},"previewMessages",[110,1092,131],{"class":124},[110,1094,1095],{"class":120},"innerHTML",[110,1097,125],{"class":124},[110,1099,1100],{"class":185}," ''",[110,1102,602],{"class":124},[110,1104,1105],{"class":112,"line":175},[110,1106,206],{"emptyLinePlaceholder":205},[110,1108,1109],{"class":112,"line":196},[110,1110,1111],{"class":212},"// 要素を一つずつ追加しながらキャプチャ\n",[110,1113,1114,1116,1118,1120,1123,1125,1128,1130],{"class":112,"line":202},[110,1115,310],{"class":233},[110,1117,380],{"class":124},[110,1119,117],{"class":116},[110,1121,1122],{"class":120}," element",[110,1124,388],{"class":116},[110,1126,1127],{"class":120}," elementsToAdd",[110,1129,393],{"class":124},[110,1131,172],{"class":124},[110,1133,1134,1136,1139,1141,1144,1146,1149,1151,1154],{"class":112,"line":209},[110,1135,646],{"class":116},[110,1137,1138],{"class":120}," newElement",[110,1140,125],{"class":124},[110,1142,1143],{"class":134}," createElementFromHTML",[110,1145,138],{"class":124},[110,1147,1148],{"class":120},"element",[110,1150,131],{"class":124},[110,1152,1153],{"class":120},"content",[110,1155,145],{"class":124},[110,1157,1158,1161,1163,1166,1168,1171,1173,1175,1177,1180],{"class":112,"line":216},[110,1159,1160],{"class":120},"    newElement",[110,1162,131],{"class":124},[110,1164,1165],{"class":120},"style",[110,1167,131],{"class":124},[110,1169,1170],{"class":120},"opacity",[110,1172,125],{"class":124},[110,1174,186],{"class":185},[110,1176,939],{"class":189},[110,1178,1179],{"class":185},"'",[110,1181,602],{"class":124},[110,1183,1184,1187,1189,1192,1194,1197],{"class":112,"line":230},[110,1185,1186],{"class":120},"    previewMessages",[110,1188,131],{"class":124},[110,1190,1191],{"class":134},"appendChild",[110,1193,138],{"class":124},[110,1195,1196],{"class":120},"newElement",[110,1198,145],{"class":124},[110,1200,1201],{"class":112,"line":242},[110,1202,206],{"emptyLinePlaceholder":205},[110,1204,1205],{"class":112,"line":375},[110,1206,1207],{"class":212},"    // フェードインアニメーションをキャプチャ\n",[110,1209,1210,1213,1215,1218,1221,1223,1225,1228,1230,1233,1236,1238,1240,1243,1245],{"class":112,"line":398},[110,1211,1212],{"class":233},"    for",[110,1214,380],{"class":124},[110,1216,1217],{"class":116},"let",[110,1219,1220],{"class":120}," step",[110,1222,125],{"class":124},[110,1224,416],{"class":141},[110,1226,1227],{"class":124},";",[110,1229,1220],{"class":120},[110,1231,1232],{"class":124}," \u003C=",[110,1234,1235],{"class":141}," 5",[110,1237,1227],{"class":124},[110,1239,1220],{"class":120},[110,1241,1242],{"class":116},"++",[110,1244,393],{"class":124},[110,1246,172],{"class":124},[110,1248,1249,1252,1254,1256,1258,1260,1262,1265,1267,1270,1273,1275],{"class":112,"line":425},[110,1250,1251],{"class":120},"        newElement",[110,1253,131],{"class":124},[110,1255,1165],{"class":120},[110,1257,131],{"class":124},[110,1259,1170],{"class":120},[110,1261,125],{"class":124},[110,1263,1264],{"class":134}," String",[110,1266,138],{"class":124},[110,1268,1269],{"class":120},"step",[110,1271,1272],{"class":116}," /",[110,1274,1235],{"class":141},[110,1276,145],{"class":124},[110,1278,1279,1282,1284,1286,1288,1290,1293],{"class":112,"line":445},[110,1280,1281],{"class":120},"        frameCanvas",[110,1283,125],{"class":124},[110,1285,325],{"class":233},[110,1287,328],{"class":134},[110,1289,138],{"class":124},[110,1291,1292],{"class":120},"previewDeviceEl",[110,1294,145],{"class":124},[110,1296,1297,1300,1302,1304,1306,1308],{"class":112,"line":450},[110,1298,1299],{"class":120},"        frames",[110,1301,131],{"class":124},[110,1303,341],{"class":134},[110,1305,138],{"class":124},[110,1307,346],{"class":120},[110,1309,145],{"class":124},[110,1311,1313],{"class":112,"line":1312},15,[110,1314,1315],{"class":124},"    }\n",[110,1317,1319],{"class":112,"line":1318},16,[110,1320,353],{"class":124},[18,1322,1323,182],{},[39,1324,734],{},[65,1326,1327,1330,1339],{},[36,1328,1329],{},"アニメーションは正しく動作するが、色が薄くなる問題が発生",[36,1331,1332,1334,1335,1338],{},[107,1333,263],{}," が CSS変数 (",[107,1336,1337],{},"var(--message-sent-bg)",") を正しく解決できない",[36,1340,1341,1343],{},[107,1342,1170],{}," のインラインスタイルも正しくキャプチャされない",[29,1345,1347],{"id":1346},"試行8-onclone-コールバックで強制的にスタイルを適用-成功","試行8: onclone コールバックで強制的にスタイルを適用 ✅ 成功",[100,1349,1351],{"className":102,"code":1350,"language":104,"meta":105,"style":105},"const captureOptions = {\n    backgroundColor: '#ffffff',\n    scale: 2,\n    useCORS: true,\n    allowTaint: true,\n    onclone: (clonedDoc) => {\n        // 強制的に色とopacityを設定\n        clonedDoc.querySelectorAll('.message-group.sent .message-bubble')\n            .forEach(el => {\n                el.style.cssText += 'background-color: #1d9bf0 !important; opacity: 1 !important;';\n            });\n        clonedDoc.querySelectorAll('.message-group.received .message-bubble')\n            .forEach(el => {\n                el.style.cssText += 'background-color: #eff3f4 !important; opacity: 1 !important;';\n            });\n        clonedDoc.querySelectorAll('.message-avatar')\n            .forEach(el => {\n                el.style.cssText += 'background-color: #1d9bf0 !important; opacity: 1 !important;';\n            });\n        clonedDoc.querySelectorAll('.message-group, .date-separator')\n            .forEach(el => {\n                el.style.cssText += 'opacity: 1 !important;';\n            });\n    }\n};\n\nframeCanvas = await html2canvas(previewDeviceEl, captureOptions);\n",[107,1352,1353,1364,1380,1391,1403,1414,1433,1438,1460,1477,1503,1508,1527,1541,1564,1568,1587,1602,1625,1630,1650,1665,1689,1694,1699,1705,1710],{"__ignoreMap":105},[110,1354,1355,1357,1360,1362],{"class":112,"line":113},[110,1356,117],{"class":116},[110,1358,1359],{"class":120}," captureOptions",[110,1361,125],{"class":124},[110,1363,172],{"class":124},[110,1365,1366,1369,1371,1373,1376,1378],{"class":112,"line":148},[110,1367,1368],{"class":178},"    backgroundColor",[110,1370,182],{"class":124},[110,1372,186],{"class":185},[110,1374,1375],{"class":189},"#ffffff",[110,1377,1179],{"class":185},[110,1379,519],{"class":124},[110,1381,1382,1385,1387,1389],{"class":112,"line":175},[110,1383,1384],{"class":178},"    scale",[110,1386,182],{"class":124},[110,1388,516],{"class":141},[110,1390,519],{"class":124},[110,1392,1393,1396,1398,1401],{"class":112,"line":196},[110,1394,1395],{"class":178},"    useCORS",[110,1397,182],{"class":124},[110,1399,1400],{"class":233}," true",[110,1402,519],{"class":124},[110,1404,1405,1408,1410,1412],{"class":112,"line":202},[110,1406,1407],{"class":178},"    allowTaint",[110,1409,182],{"class":124},[110,1411,1400],{"class":233},[110,1413,519],{"class":124},[110,1415,1416,1419,1421,1423,1426,1428,1431],{"class":112,"line":209},[110,1417,1418],{"class":134},"    onclone",[110,1420,182],{"class":124},[110,1422,380],{"class":124},[110,1424,1425],{"class":120},"clonedDoc",[110,1427,393],{"class":124},[110,1429,1430],{"class":124}," =>",[110,1432,172],{"class":124},[110,1434,1435],{"class":112,"line":216},[110,1436,1437],{"class":212},"        // 強制的に色とopacityを設定\n",[110,1439,1440,1443,1445,1448,1450,1452,1455,1457],{"class":112,"line":230},[110,1441,1442],{"class":120},"        clonedDoc",[110,1444,131],{"class":124},[110,1446,1447],{"class":134},"querySelectorAll",[110,1449,138],{"class":124},[110,1451,1179],{"class":185},[110,1453,1454],{"class":189},".message-group.sent .message-bubble",[110,1456,1179],{"class":185},[110,1458,1459],{"class":124},")\n",[110,1461,1462,1465,1468,1470,1473,1475],{"class":112,"line":242},[110,1463,1464],{"class":124},"            .",[110,1466,1467],{"class":134},"forEach",[110,1469,138],{"class":124},[110,1471,1472],{"class":120},"el",[110,1474,1430],{"class":124},[110,1476,172],{"class":124},[110,1478,1479,1482,1484,1486,1488,1491,1494,1496,1499,1501],{"class":112,"line":375},[110,1480,1481],{"class":120},"                el",[110,1483,131],{"class":124},[110,1485,1165],{"class":120},[110,1487,131],{"class":124},[110,1489,1490],{"class":120},"cssText",[110,1492,1493],{"class":116}," +=",[110,1495,186],{"class":185},[110,1497,1498],{"class":189},"background-color: #1d9bf0 !important; opacity: 1 !important;",[110,1500,1179],{"class":185},[110,1502,602],{"class":124},[110,1504,1505],{"class":112,"line":398},[110,1506,1507],{"class":124},"            });\n",[110,1509,1510,1512,1514,1516,1518,1520,1523,1525],{"class":112,"line":425},[110,1511,1442],{"class":120},[110,1513,131],{"class":124},[110,1515,1447],{"class":134},[110,1517,138],{"class":124},[110,1519,1179],{"class":185},[110,1521,1522],{"class":189},".message-group.received .message-bubble",[110,1524,1179],{"class":185},[110,1526,1459],{"class":124},[110,1528,1529,1531,1533,1535,1537,1539],{"class":112,"line":445},[110,1530,1464],{"class":124},[110,1532,1467],{"class":134},[110,1534,138],{"class":124},[110,1536,1472],{"class":120},[110,1538,1430],{"class":124},[110,1540,172],{"class":124},[110,1542,1543,1545,1547,1549,1551,1553,1555,1557,1560,1562],{"class":112,"line":450},[110,1544,1481],{"class":120},[110,1546,131],{"class":124},[110,1548,1165],{"class":120},[110,1550,131],{"class":124},[110,1552,1490],{"class":120},[110,1554,1493],{"class":116},[110,1556,186],{"class":185},[110,1558,1559],{"class":189},"background-color: #eff3f4 !important; opacity: 1 !important;",[110,1561,1179],{"class":185},[110,1563,602],{"class":124},[110,1565,1566],{"class":112,"line":1312},[110,1567,1507],{"class":124},[110,1569,1570,1572,1574,1576,1578,1580,1583,1585],{"class":112,"line":1318},[110,1571,1442],{"class":120},[110,1573,131],{"class":124},[110,1575,1447],{"class":134},[110,1577,138],{"class":124},[110,1579,1179],{"class":185},[110,1581,1582],{"class":189},".message-avatar",[110,1584,1179],{"class":185},[110,1586,1459],{"class":124},[110,1588,1590,1592,1594,1596,1598,1600],{"class":112,"line":1589},17,[110,1591,1464],{"class":124},[110,1593,1467],{"class":134},[110,1595,138],{"class":124},[110,1597,1472],{"class":120},[110,1599,1430],{"class":124},[110,1601,172],{"class":124},[110,1603,1605,1607,1609,1611,1613,1615,1617,1619,1621,1623],{"class":112,"line":1604},18,[110,1606,1481],{"class":120},[110,1608,131],{"class":124},[110,1610,1165],{"class":120},[110,1612,131],{"class":124},[110,1614,1490],{"class":120},[110,1616,1493],{"class":116},[110,1618,186],{"class":185},[110,1620,1498],{"class":189},[110,1622,1179],{"class":185},[110,1624,602],{"class":124},[110,1626,1628],{"class":112,"line":1627},19,[110,1629,1507],{"class":124},[110,1631,1633,1635,1637,1639,1641,1643,1646,1648],{"class":112,"line":1632},20,[110,1634,1442],{"class":120},[110,1636,131],{"class":124},[110,1638,1447],{"class":134},[110,1640,138],{"class":124},[110,1642,1179],{"class":185},[110,1644,1645],{"class":189},".message-group, .date-separator",[110,1647,1179],{"class":185},[110,1649,1459],{"class":124},[110,1651,1653,1655,1657,1659,1661,1663],{"class":112,"line":1652},21,[110,1654,1464],{"class":124},[110,1656,1467],{"class":134},[110,1658,138],{"class":124},[110,1660,1472],{"class":120},[110,1662,1430],{"class":124},[110,1664,172],{"class":124},[110,1666,1668,1670,1672,1674,1676,1678,1680,1682,1685,1687],{"class":112,"line":1667},22,[110,1669,1481],{"class":120},[110,1671,131],{"class":124},[110,1673,1165],{"class":120},[110,1675,131],{"class":124},[110,1677,1490],{"class":120},[110,1679,1493],{"class":116},[110,1681,186],{"class":185},[110,1683,1684],{"class":189},"opacity: 1 !important;",[110,1686,1179],{"class":185},[110,1688,602],{"class":124},[110,1690,1692],{"class":112,"line":1691},23,[110,1693,1507],{"class":124},[110,1695,1697],{"class":112,"line":1696},24,[110,1698,1315],{"class":124},[110,1700,1702],{"class":112,"line":1701},25,[110,1703,1704],{"class":124},"};\n",[110,1706,1708],{"class":112,"line":1707},26,[110,1709,206],{"emptyLinePlaceholder":205},[110,1711,1713,1715,1717,1719,1721,1723,1725,1727,1729],{"class":112,"line":1712},27,[110,1714,346],{"class":120},[110,1716,125],{"class":124},[110,1718,325],{"class":233},[110,1720,328],{"class":134},[110,1722,138],{"class":124},[110,1724,1292],{"class":120},[110,1726,169],{"class":124},[110,1728,1359],{"class":120},[110,1730,145],{"class":124},[18,1732,1733,182],{},[39,1734,1735],{},"成功のポイント",[65,1737,1738,1744,1750,1753],{},[36,1739,1740,1743],{},[107,1741,1742],{},"onclone"," コールバックでクローンされたDOMを修正",[36,1745,1746,1749],{},[107,1747,1748],{},"!important"," で他のスタイルを上書き",[36,1751,1752],{},"CSS変数を直接の色コードに置き換え",[36,1754,1755,1758],{},[107,1756,1757],{},"opacity: 1"," を強制的に設定",[18,1760,1761,1763],{},[39,1762,278],{},": 色が正確にキャプチャされ、WebM動画が正しく出力される",[29,1765,1767],{"id":1766},"試行9-レイアウトシフト問題の修正-成功","試行9: レイアウトシフト問題の修正 ✅ 成功",[18,1769,1770,1772],{},[39,1771,734],{},": 新しいメッセージが追加されると、既存のメッセージが上に動いてしまう（レイアウトが再計算されるため）",[18,1774,1775,1778],{},[39,1776,1777],{},"原因",": 要素を一つずつDOMに追加すると、フレックスボックスのレイアウトが毎回再計算され、既存の要素の位置がずれる",[18,1780,1781,1784],{},[39,1782,1783],{},"解決策",": 事前にすべての要素を非表示でDOMに追加し、レイアウトを固定してからアニメーションを開始",[100,1786,1788],{"className":102,"code":1787,"language":104,"meta":105,"style":105},"// Step 1: すべての要素を非表示でDOMに追加（レイアウト固定）\nconst addedElements = [];\nfor (let i = 0; i \u003C elementsToAdd.length; i++) {\n    const newElement = createElementFromHTML(element.content);\n    newElement.style.opacity = '0';\n    newElement.style.visibility = 'hidden';\n    newElement.setAttribute('data-animate-id', i);\n    previewMessages.appendChild(newElement);\n    addedElements.push(newElement);\n}\n\n// レイアウトを安定させる\nvoid previewMessages.offsetHeight;\nawait sleep(100);\n\n// Step 2: 各要素を順番にアニメーション\nfor (let i = 0; i \u003C addedElements.length; i++) {\n    // onclone で各フレームの状態を制御\n    onclone: (clonedDoc) => {\n        // 未来の要素 → 非表示\n        for (let k = i + 1; k \u003C addedElements.length; k++) {\n            clonedDoc.querySelector(`[data-animate-id=\"${k}\"]`)\n                .style.cssText += 'opacity: 0 !important; visibility: hidden !important;';\n        }\n        // 現在の要素 → アニメーション中の状態\n        clonedDoc.querySelector(`[data-animate-id=\"${i}\"]`)\n            .style.cssText += `opacity: ${currentOpacity} !important; transform: translateY(${translateY}px) !important;`;\n        // 過去の要素 → 完全表示\n        for (let j = 0; j \u003C i; j++) {\n            clonedDoc.querySelector(`[data-animate-id=\"${j}\"]`)\n                .style.cssText += 'opacity: 1 !important; visibility: visible !important;';\n        }\n    }\n}\n",[107,1789,1790,1795,1806,1844,1864,1886,1910,1934,1948,1963,1967,1971,1976,1991,2004,2008,2013,2049,2054,2070,2075,2119,2153,2175,2180,2185,2212,2254,2260,2294,2322,2344,2349,2354],{"__ignoreMap":105},[110,1791,1792],{"class":112,"line":113},[110,1793,1794],{"class":212},"// Step 1: すべての要素を非表示でDOMに追加（レイアウト固定）\n",[110,1796,1797,1799,1802,1804],{"class":112,"line":148},[110,1798,117],{"class":116},[110,1800,1801],{"class":120}," addedElements",[110,1803,125],{"class":124},[110,1805,305],{"class":124},[110,1807,1808,1810,1812,1814,1816,1818,1820,1822,1824,1827,1829,1831,1834,1836,1838,1840,1842],{"class":112,"line":175},[110,1809,310],{"class":233},[110,1811,380],{"class":124},[110,1813,1217],{"class":116},[110,1815,858],{"class":120},[110,1817,125],{"class":124},[110,1819,416],{"class":141},[110,1821,1227],{"class":124},[110,1823,858],{"class":120},[110,1825,1826],{"class":124}," \u003C",[110,1828,1127],{"class":120},[110,1830,131],{"class":124},[110,1832,1833],{"class":178},"length",[110,1835,1227],{"class":124},[110,1837,858],{"class":120},[110,1839,1242],{"class":116},[110,1841,393],{"class":124},[110,1843,172],{"class":124},[110,1845,1846,1848,1850,1852,1854,1856,1858,1860,1862],{"class":112,"line":196},[110,1847,646],{"class":116},[110,1849,1138],{"class":120},[110,1851,125],{"class":124},[110,1853,1143],{"class":134},[110,1855,138],{"class":124},[110,1857,1148],{"class":120},[110,1859,131],{"class":124},[110,1861,1153],{"class":120},[110,1863,145],{"class":124},[110,1865,1866,1868,1870,1872,1874,1876,1878,1880,1882,1884],{"class":112,"line":202},[110,1867,1160],{"class":120},[110,1869,131],{"class":124},[110,1871,1165],{"class":120},[110,1873,131],{"class":124},[110,1875,1170],{"class":120},[110,1877,125],{"class":124},[110,1879,186],{"class":185},[110,1881,939],{"class":189},[110,1883,1179],{"class":185},[110,1885,602],{"class":124},[110,1887,1888,1890,1892,1894,1896,1899,1901,1903,1906,1908],{"class":112,"line":209},[110,1889,1160],{"class":120},[110,1891,131],{"class":124},[110,1893,1165],{"class":120},[110,1895,131],{"class":124},[110,1897,1898],{"class":120},"visibility",[110,1900,125],{"class":124},[110,1902,186],{"class":185},[110,1904,1905],{"class":189},"hidden",[110,1907,1179],{"class":185},[110,1909,602],{"class":124},[110,1911,1912,1914,1916,1919,1921,1923,1926,1928,1930,1932],{"class":112,"line":216},[110,1913,1160],{"class":120},[110,1915,131],{"class":124},[110,1917,1918],{"class":134},"setAttribute",[110,1920,138],{"class":124},[110,1922,1179],{"class":185},[110,1924,1925],{"class":189},"data-animate-id",[110,1927,1179],{"class":185},[110,1929,169],{"class":124},[110,1931,858],{"class":120},[110,1933,145],{"class":124},[110,1935,1936,1938,1940,1942,1944,1946],{"class":112,"line":230},[110,1937,1186],{"class":120},[110,1939,131],{"class":124},[110,1941,1191],{"class":134},[110,1943,138],{"class":124},[110,1945,1196],{"class":120},[110,1947,145],{"class":124},[110,1949,1950,1953,1955,1957,1959,1961],{"class":112,"line":242},[110,1951,1952],{"class":120},"    addedElements",[110,1954,131],{"class":124},[110,1956,341],{"class":134},[110,1958,138],{"class":124},[110,1960,1196],{"class":120},[110,1962,145],{"class":124},[110,1964,1965],{"class":112,"line":375},[110,1966,353],{"class":124},[110,1968,1969],{"class":112,"line":398},[110,1970,206],{"emptyLinePlaceholder":205},[110,1972,1973],{"class":112,"line":425},[110,1974,1975],{"class":212},"// レイアウトを安定させる\n",[110,1977,1978,1981,1984,1986,1989],{"class":112,"line":445},[110,1979,1980],{"class":116},"void",[110,1982,1983],{"class":120}," previewMessages",[110,1985,131],{"class":124},[110,1987,1988],{"class":120},"offsetHeight",[110,1990,602],{"class":124},[110,1992,1993,1995,1997,1999,2002],{"class":112,"line":450},[110,1994,234],{"class":233},[110,1996,431],{"class":134},[110,1998,138],{"class":124},[110,2000,2001],{"class":141},"100",[110,2003,145],{"class":124},[110,2005,2006],{"class":112,"line":1312},[110,2007,206],{"emptyLinePlaceholder":205},[110,2009,2010],{"class":112,"line":1318},[110,2011,2012],{"class":212},"// Step 2: 各要素を順番にアニメーション\n",[110,2014,2015,2017,2019,2021,2023,2025,2027,2029,2031,2033,2035,2037,2039,2041,2043,2045,2047],{"class":112,"line":1589},[110,2016,310],{"class":233},[110,2018,380],{"class":124},[110,2020,1217],{"class":116},[110,2022,858],{"class":120},[110,2024,125],{"class":124},[110,2026,416],{"class":141},[110,2028,1227],{"class":124},[110,2030,858],{"class":120},[110,2032,1826],{"class":124},[110,2034,1801],{"class":120},[110,2036,131],{"class":124},[110,2038,1833],{"class":178},[110,2040,1227],{"class":124},[110,2042,858],{"class":120},[110,2044,1242],{"class":116},[110,2046,393],{"class":124},[110,2048,172],{"class":124},[110,2050,2051],{"class":112,"line":1604},[110,2052,2053],{"class":212},"    // onclone で各フレームの状態を制御\n",[110,2055,2056,2058,2060,2062,2064,2066,2068],{"class":112,"line":1627},[110,2057,1418],{"class":134},[110,2059,182],{"class":124},[110,2061,380],{"class":124},[110,2063,1425],{"class":120},[110,2065,393],{"class":124},[110,2067,1430],{"class":124},[110,2069,172],{"class":124},[110,2071,2072],{"class":112,"line":1632},[110,2073,2074],{"class":212},"        // 未来の要素 → 非表示\n",[110,2076,2077,2080,2082,2084,2087,2089,2091,2094,2097,2099,2101,2103,2105,2107,2109,2111,2113,2115,2117],{"class":112,"line":1652},[110,2078,2079],{"class":233},"        for",[110,2081,380],{"class":124},[110,2083,1217],{"class":116},[110,2085,2086],{"class":120}," k",[110,2088,125],{"class":124},[110,2090,858],{"class":120},[110,2092,2093],{"class":116}," +",[110,2095,2096],{"class":141}," 1",[110,2098,1227],{"class":124},[110,2100,2086],{"class":120},[110,2102,1826],{"class":124},[110,2104,1801],{"class":120},[110,2106,131],{"class":124},[110,2108,1833],{"class":178},[110,2110,1227],{"class":124},[110,2112,2086],{"class":120},[110,2114,1242],{"class":116},[110,2116,393],{"class":124},[110,2118,172],{"class":124},[110,2120,2121,2124,2126,2129,2131,2134,2137,2140,2143,2146,2149,2151],{"class":112,"line":1667},[110,2122,2123],{"class":120},"            clonedDoc",[110,2125,131],{"class":124},[110,2127,2128],{"class":134},"querySelector",[110,2130,138],{"class":124},[110,2132,2133],{"class":185},"`",[110,2135,2136],{"class":189},"[data-animate-id=\"",[110,2138,2139],{"class":233},"${",[110,2141,2142],{"class":189},"k",[110,2144,2145],{"class":233},"}",[110,2147,2148],{"class":189},"\"]",[110,2150,2133],{"class":185},[110,2152,1459],{"class":124},[110,2154,2155,2158,2160,2162,2164,2166,2168,2171,2173],{"class":112,"line":1691},[110,2156,2157],{"class":124},"                .",[110,2159,1165],{"class":120},[110,2161,131],{"class":124},[110,2163,1490],{"class":120},[110,2165,1493],{"class":116},[110,2167,186],{"class":185},[110,2169,2170],{"class":189},"opacity: 0 !important; visibility: hidden !important;",[110,2172,1179],{"class":185},[110,2174,602],{"class":124},[110,2176,2177],{"class":112,"line":1696},[110,2178,2179],{"class":124},"        }\n",[110,2181,2182],{"class":112,"line":1701},[110,2183,2184],{"class":212},"        // 現在の要素 → アニメーション中の状態\n",[110,2186,2187,2189,2191,2193,2195,2197,2199,2201,2204,2206,2208,2210],{"class":112,"line":1707},[110,2188,1442],{"class":120},[110,2190,131],{"class":124},[110,2192,2128],{"class":134},[110,2194,138],{"class":124},[110,2196,2133],{"class":185},[110,2198,2136],{"class":189},[110,2200,2139],{"class":233},[110,2202,2203],{"class":189},"i",[110,2205,2145],{"class":233},[110,2207,2148],{"class":189},[110,2209,2133],{"class":185},[110,2211,1459],{"class":124},[110,2213,2214,2216,2218,2220,2222,2224,2227,2230,2232,2235,2237,2240,2242,2245,2247,2250,2252],{"class":112,"line":1712},[110,2215,1464],{"class":124},[110,2217,1165],{"class":120},[110,2219,131],{"class":124},[110,2221,1490],{"class":120},[110,2223,1493],{"class":116},[110,2225,2226],{"class":185}," `",[110,2228,2229],{"class":189},"opacity: ",[110,2231,2139],{"class":233},[110,2233,2234],{"class":189},"currentOpacity",[110,2236,2145],{"class":233},[110,2238,2239],{"class":189}," !important; transform: translateY(",[110,2241,2139],{"class":233},[110,2243,2244],{"class":189},"translateY",[110,2246,2145],{"class":233},[110,2248,2249],{"class":189},"px) !important;",[110,2251,2133],{"class":185},[110,2253,602],{"class":124},[110,2255,2257],{"class":112,"line":2256},28,[110,2258,2259],{"class":212},"        // 過去の要素 → 完全表示\n",[110,2261,2263,2265,2267,2269,2272,2274,2276,2278,2280,2282,2284,2286,2288,2290,2292],{"class":112,"line":2262},29,[110,2264,2079],{"class":233},[110,2266,380],{"class":124},[110,2268,1217],{"class":116},[110,2270,2271],{"class":120}," j",[110,2273,125],{"class":124},[110,2275,416],{"class":141},[110,2277,1227],{"class":124},[110,2279,2271],{"class":120},[110,2281,1826],{"class":124},[110,2283,858],{"class":120},[110,2285,1227],{"class":124},[110,2287,2271],{"class":120},[110,2289,1242],{"class":116},[110,2291,393],{"class":124},[110,2293,172],{"class":124},[110,2295,2297,2299,2301,2303,2305,2307,2309,2311,2314,2316,2318,2320],{"class":112,"line":2296},30,[110,2298,2123],{"class":120},[110,2300,131],{"class":124},[110,2302,2128],{"class":134},[110,2304,138],{"class":124},[110,2306,2133],{"class":185},[110,2308,2136],{"class":189},[110,2310,2139],{"class":233},[110,2312,2313],{"class":189},"j",[110,2315,2145],{"class":233},[110,2317,2148],{"class":189},[110,2319,2133],{"class":185},[110,2321,1459],{"class":124},[110,2323,2325,2327,2329,2331,2333,2335,2337,2340,2342],{"class":112,"line":2324},31,[110,2326,2157],{"class":124},[110,2328,1165],{"class":120},[110,2330,131],{"class":124},[110,2332,1490],{"class":120},[110,2334,1493],{"class":116},[110,2336,186],{"class":185},[110,2338,2339],{"class":189},"opacity: 1 !important; visibility: visible !important;",[110,2341,1179],{"class":185},[110,2343,602],{"class":124},[110,2345,2347],{"class":112,"line":2346},32,[110,2348,2179],{"class":124},[110,2350,2352],{"class":112,"line":2351},33,[110,2353,1315],{"class":124},[110,2355,2357],{"class":112,"line":2356},34,[110,2358,353],{"class":124},[18,2360,2361,182],{},[39,2362,1735],{},[65,2364,2365,2368,2373,2378],{},[36,2366,2367],{},"すべての要素を最初に追加してレイアウトを固定",[36,2369,2370,2372],{},[107,2371,1925],{}," 属性で各要素を識別",[36,2374,2375,2377],{},[107,2376,1742],{}," で未来/現在/過去の要素を個別に制御",[36,2379,2380],{},"既存のメッセージが動かない",[18,2382,2383,2385],{},[39,2384,278],{},": スムーズなアニメーションで、既存のメッセージ位置が固定される",[56,2387],{},[14,2389,2390],{"id":2390},"根本的な問題の分析",[33,2392,2393,2418,2433],{},[36,2394,2395,182,2398],{},[39,2396,2397],{},"html2canvasの制約",[65,2399,2400,2403,2406,2409],{},[36,2401,2402],{},"処理が重い（1フレーム100-500ms）",[36,2404,2405],{},"リアルタイムアニメーションキャプチャに不向き",[36,2407,2408],{},"DOMをcanvasにレンダリングする間接的な方法",[36,2410,2411,2414,2415,2417],{},[39,2412,2413],{},"重要",": インラインスタイル",[107,2416,910],{},"を正しくキャプチャしない場合がある",[36,2419,2420,182,2423],{},[39,2421,2422],{},"ブラウザのセキュリティ制約",[65,2424,2425,2430],{},[36,2426,2427,2429],{},[107,2428,549],{},"プロトコルではWeb Workerが使えない",[36,2431,2432],{},"外部スクリプトのCORS制限",[36,2434,2435,182,2438],{},[39,2436,2437],{},"GIFの制約",[65,2439,2440,2443],{},[36,2441,2442],{},"256色パレット制限",[36,2444,2445],{},"フレームごとにパレットが異なると色がチラつく",[14,2447,1783],{"id":1783},[18,2449,2450],{},[39,2451,2452],{},"html2canvas で要素を「隠す」のではなく「存在させない」",[18,2454,2455,2456,2459,2460,2462],{},"問題: ",[107,2457,2458],{},"element.style.opacity = '0'","を設定しても、",[107,2461,263],{},"がその要素を見える状態でキャプチャしてしまう。",[18,2464,2465],{},"解決: 要素をDOMから完全に削除し、アニメーションの進行に合わせて一つずつ追加する。",[100,2467,2469],{"className":102,"code":2468,"language":104,"meta":105,"style":105},"// ❌ 失敗するアプローチ\nelements.forEach(el => el.style.opacity = '0');  // 隠したつもり\nawait html2canvas(container);  // でも見える状態でキャプチャされる\n\n// ✅ 成功するアプローチ\ncontainer.innerHTML = '';  // 完全に空にする\nawait html2canvas(container);  // 空の状態がキャプチャされる\ncontainer.appendChild(newElement);  // 要素を追加\nawait html2canvas(container);  // 追加された要素がキャプチャされる\n",[107,2470,2471,2476,2515,2531,2535,2540,2557,2572,2589],{"__ignoreMap":105},[110,2472,2473],{"class":112,"line":113},[110,2474,2475],{"class":212},"// ❌ 失敗するアプローチ\n",[110,2477,2478,2481,2483,2485,2487,2489,2491,2494,2496,2498,2500,2502,2504,2506,2508,2510,2512],{"class":112,"line":148},[110,2479,2480],{"class":120},"elements",[110,2482,131],{"class":124},[110,2484,1467],{"class":134},[110,2486,138],{"class":124},[110,2488,1472],{"class":120},[110,2490,1430],{"class":124},[110,2492,2493],{"class":120}," el",[110,2495,131],{"class":124},[110,2497,1165],{"class":120},[110,2499,131],{"class":124},[110,2501,1170],{"class":120},[110,2503,125],{"class":124},[110,2505,186],{"class":185},[110,2507,939],{"class":189},[110,2509,1179],{"class":185},[110,2511,439],{"class":124},[110,2513,2514],{"class":212},"  // 隠したつもり\n",[110,2516,2517,2519,2521,2523,2526,2528],{"class":112,"line":175},[110,2518,234],{"class":233},[110,2520,328],{"class":134},[110,2522,138],{"class":124},[110,2524,2525],{"class":120},"container",[110,2527,439],{"class":124},[110,2529,2530],{"class":212},"  // でも見える状態でキャプチャされる\n",[110,2532,2533],{"class":112,"line":196},[110,2534,206],{"emptyLinePlaceholder":205},[110,2536,2537],{"class":112,"line":202},[110,2538,2539],{"class":212},"// ✅ 成功するアプローチ\n",[110,2541,2542,2544,2546,2548,2550,2552,2554],{"class":112,"line":209},[110,2543,2525],{"class":120},[110,2545,131],{"class":124},[110,2547,1095],{"class":120},[110,2549,125],{"class":124},[110,2551,1100],{"class":185},[110,2553,1227],{"class":124},[110,2555,2556],{"class":212},"  // 完全に空にする\n",[110,2558,2559,2561,2563,2565,2567,2569],{"class":112,"line":216},[110,2560,234],{"class":233},[110,2562,328],{"class":134},[110,2564,138],{"class":124},[110,2566,2525],{"class":120},[110,2568,439],{"class":124},[110,2570,2571],{"class":212},"  // 空の状態がキャプチャされる\n",[110,2573,2574,2576,2578,2580,2582,2584,2586],{"class":112,"line":230},[110,2575,2525],{"class":120},[110,2577,131],{"class":124},[110,2579,1191],{"class":134},[110,2581,138],{"class":124},[110,2583,1196],{"class":120},[110,2585,439],{"class":124},[110,2587,2588],{"class":212},"  // 要素を追加\n",[110,2590,2591,2593,2595,2597,2599,2601],{"class":112,"line":242},[110,2592,234],{"class":233},[110,2594,328],{"class":134},[110,2596,138],{"class":124},[110,2598,2525],{"class":120},[110,2600,439],{"class":124},[110,2602,2603],{"class":212},"  // 追加された要素がキャプチャされる\n",[56,2605],{},[14,2607,2609],{"id":2608},"試していないアプローチ今後の改善候補","試していないアプローチ（今後の改善候補）",[29,2611,2613],{"id":2612},"_1-ローカルhttpサーバーを使用","1. ローカルHTTPサーバーを使用",[100,2615,2619],{"className":2616,"code":2617,"language":2618,"meta":105,"style":105},"language-bash shiki shiki-themes vitesse-light vitesse-light","# Python\npython -m http.server 8000\n\n# Node.js\nnpx serve .\n","bash",[107,2620,2621,2626,2641,2645,2650],{"__ignoreMap":105},[110,2622,2623],{"class":112,"line":113},[110,2624,2625],{"class":212},"# Python\n",[110,2627,2628,2631,2635,2638],{"class":112,"line":148},[110,2629,2630],{"class":134},"python",[110,2632,2634],{"class":2633},"snbK4"," -m",[110,2636,2637],{"class":189}," http.server",[110,2639,2640],{"class":141}," 8000\n",[110,2642,2643],{"class":112,"line":175},[110,2644,206],{"emptyLinePlaceholder":205},[110,2646,2647],{"class":112,"line":196},[110,2648,2649],{"class":212},"# Node.js\n",[110,2651,2652,2655,2658],{"class":112,"line":202},[110,2653,2654],{"class":134},"npx",[110,2656,2657],{"class":189}," serve",[110,2659,2660],{"class":189}," .\n",[65,2662,2663,2669],{},[36,2664,2665,2668],{},[107,2666,2667],{},"http://localhost:8000"," でアクセスすれば、Worker が使える",[36,2670,2671],{},"gif.js などの高機能ライブラリが使える可能性",[29,2673,2675],{"id":2674},"_2-canvas-への直接描画html2canvas-を使わない","2. Canvas への直接描画（html2canvas を使わない）",[100,2677,2679],{"className":102,"code":2678,"language":104,"meta":105,"style":105},"// DOM を経由せず、直接 canvas に描画\nctx.fillStyle = '#ffffff';\nctx.fillRect(0, 0, width, height);\nctx.fillStyle = '#1d9bf0';\nctx.fillText('Hello', x, y);\n// ...\n",[107,2680,2681,2686,2706,2733,2752,2782],{"__ignoreMap":105},[110,2682,2683],{"class":112,"line":113},[110,2684,2685],{"class":212},"// DOM を経由せず、直接 canvas に描画\n",[110,2687,2688,2691,2693,2696,2698,2700,2702,2704],{"class":112,"line":148},[110,2689,2690],{"class":120},"ctx",[110,2692,131],{"class":124},[110,2694,2695],{"class":120},"fillStyle",[110,2697,125],{"class":124},[110,2699,186],{"class":185},[110,2701,1375],{"class":189},[110,2703,1179],{"class":185},[110,2705,602],{"class":124},[110,2707,2708,2710,2712,2715,2717,2719,2721,2723,2725,2727,2729,2731],{"class":112,"line":175},[110,2709,2690],{"class":120},[110,2711,131],{"class":124},[110,2713,2714],{"class":134},"fillRect",[110,2716,138],{"class":124},[110,2718,939],{"class":141},[110,2720,169],{"class":124},[110,2722,416],{"class":141},[110,2724,169],{"class":124},[110,2726,706],{"class":120},[110,2728,169],{"class":124},[110,2730,711],{"class":120},[110,2732,145],{"class":124},[110,2734,2735,2737,2739,2741,2743,2745,2748,2750],{"class":112,"line":196},[110,2736,2690],{"class":120},[110,2738,131],{"class":124},[110,2740,2695],{"class":120},[110,2742,125],{"class":124},[110,2744,186],{"class":185},[110,2746,2747],{"class":189},"#1d9bf0",[110,2749,1179],{"class":185},[110,2751,602],{"class":124},[110,2753,2754,2756,2758,2761,2763,2765,2768,2770,2772,2775,2777,2780],{"class":112,"line":202},[110,2755,2690],{"class":120},[110,2757,131],{"class":124},[110,2759,2760],{"class":134},"fillText",[110,2762,138],{"class":124},[110,2764,1179],{"class":185},[110,2766,2767],{"class":189},"Hello",[110,2769,1179],{"class":185},[110,2771,169],{"class":124},[110,2773,2774],{"class":120}," x",[110,2776,169],{"class":124},[110,2778,2779],{"class":120}," y",[110,2781,145],{"class":124},[110,2783,2784],{"class":112,"line":209},[110,2785,2786],{"class":212},"// ...\n",[65,2788,2789,2792],{},[36,2790,2791],{},"高速（リアルタイムアニメーション可能）",[36,2793,2794],{},"ただし、DOM レイアウトを再実装する必要がある",[29,2796,2798],{"id":2797},"_3-webcodecs-api","3. WebCodecs API",[100,2800,2802],{"className":102,"code":2801,"language":104,"meta":105,"style":105},"const encoder = new VideoEncoder({\n    output: (chunk) => { /* ... */ },\n    error: (e) => console.error(e)\n});\nencoder.configure({ codec: 'vp8', width, height });\n",[107,2803,2804,2820,2844,2874,2878],{"__ignoreMap":105},[110,2805,2806,2808,2811,2813,2815,2818],{"class":112,"line":113},[110,2807,117],{"class":116},[110,2809,2810],{"class":120}," encoder",[110,2812,125],{"class":124},[110,2814,158],{"class":116},[110,2816,2817],{"class":134}," VideoEncoder",[110,2819,506],{"class":124},[110,2821,2822,2825,2827,2829,2832,2834,2836,2838,2841],{"class":112,"line":148},[110,2823,2824],{"class":134},"    output",[110,2826,182],{"class":124},[110,2828,380],{"class":124},[110,2830,2831],{"class":120},"chunk",[110,2833,393],{"class":124},[110,2835,1430],{"class":124},[110,2837,578],{"class":124},[110,2839,2840],{"class":212}," /* ... */",[110,2842,2843],{"class":124}," },\n",[110,2845,2846,2849,2851,2853,2856,2858,2860,2863,2865,2868,2870,2872],{"class":112,"line":175},[110,2847,2848],{"class":134},"    error",[110,2850,182],{"class":124},[110,2852,380],{"class":124},[110,2854,2855],{"class":120},"e",[110,2857,393],{"class":124},[110,2859,1430],{"class":124},[110,2861,2862],{"class":120}," console",[110,2864,131],{"class":124},[110,2866,2867],{"class":134},"error",[110,2869,138],{"class":124},[110,2871,2855],{"class":120},[110,2873,1459],{"class":124},[110,2875,2876],{"class":112,"line":196},[110,2877,199],{"class":124},[110,2879,2880,2883,2885,2888,2891,2894,2896,2898,2901,2903,2905,2907,2909,2911],{"class":112,"line":202},[110,2881,2882],{"class":120},"encoder",[110,2884,131],{"class":124},[110,2886,2887],{"class":134},"configure",[110,2889,2890],{"class":124},"({",[110,2892,2893],{"class":178}," codec",[110,2895,182],{"class":124},[110,2897,186],{"class":185},[110,2899,2900],{"class":189},"vp8",[110,2902,1179],{"class":185},[110,2904,169],{"class":124},[110,2906,706],{"class":120},[110,2908,169],{"class":124},[110,2910,711],{"class":120},[110,2912,725],{"class":124},[65,2914,2915,2918],{},[36,2916,2917],{},"より低レベルな動画エンコーディング制御",[36,2919,2920],{},"ただしブラウザサポートが限定的（Chrome/Edge のみ）",[29,2922,2924],{"id":2923},"_4-png-連番ダウンロード-外部ツール","4. PNG 連番ダウンロード + 外部ツール",[100,2926,2928],{"className":102,"code":2927,"language":104,"meta":105,"style":105},"// 各フレームを PNG としてダウンロード\nfor (let i = 0; i \u003C frames.length; i++) {\n    const link = document.createElement('a');\n    link.download = `frame-${i.toString().padStart(3, '0')}.png`;\n    link.href = frames[i].toDataURL();\n    link.click();\n}\n",[107,2929,2930,2935,2971,2998,3054,3080,3091],{"__ignoreMap":105},[110,2931,2932],{"class":112,"line":113},[110,2933,2934],{"class":212},"// 各フレームを PNG としてダウンロード\n",[110,2936,2937,2939,2941,2943,2945,2947,2949,2951,2953,2955,2957,2959,2961,2963,2965,2967,2969],{"class":112,"line":148},[110,2938,310],{"class":233},[110,2940,380],{"class":124},[110,2942,1217],{"class":116},[110,2944,858],{"class":120},[110,2946,125],{"class":124},[110,2948,416],{"class":141},[110,2950,1227],{"class":124},[110,2952,858],{"class":120},[110,2954,1826],{"class":124},[110,2956,300],{"class":120},[110,2958,131],{"class":124},[110,2960,1833],{"class":178},[110,2962,1227],{"class":124},[110,2964,858],{"class":120},[110,2966,1242],{"class":116},[110,2968,393],{"class":124},[110,2970,172],{"class":124},[110,2972,2973,2975,2978,2980,2983,2985,2988,2990,2992,2994,2996],{"class":112,"line":175},[110,2974,646],{"class":116},[110,2976,2977],{"class":120}," link",[110,2979,125],{"class":124},[110,2981,2982],{"class":120}," document",[110,2984,131],{"class":124},[110,2986,2987],{"class":134},"createElement",[110,2989,138],{"class":124},[110,2991,1179],{"class":185},[110,2993,22],{"class":189},[110,2995,1179],{"class":185},[110,2997,145],{"class":124},[110,2999,3000,3003,3005,3008,3010,3012,3015,3017,3019,3021,3024,3027,3030,3032,3035,3037,3039,3041,3043,3045,3047,3050,3052],{"class":112,"line":196},[110,3001,3002],{"class":120},"    link",[110,3004,131],{"class":124},[110,3006,3007],{"class":120},"download",[110,3009,125],{"class":124},[110,3011,2226],{"class":185},[110,3013,3014],{"class":189},"frame-",[110,3016,2139],{"class":233},[110,3018,2203],{"class":189},[110,3020,131],{"class":124},[110,3022,3023],{"class":134},"toString",[110,3025,3026],{"class":124},"().",[110,3028,3029],{"class":134},"padStart",[110,3031,138],{"class":124},[110,3033,3034],{"class":141},"3",[110,3036,169],{"class":124},[110,3038,186],{"class":185},[110,3040,939],{"class":189},[110,3042,1179],{"class":185},[110,3044,393],{"class":124},[110,3046,2145],{"class":233},[110,3048,3049],{"class":189},".png",[110,3051,2133],{"class":185},[110,3053,602],{"class":124},[110,3055,3056,3058,3060,3063,3065,3067,3070,3072,3075,3078],{"class":112,"line":202},[110,3057,3002],{"class":120},[110,3059,131],{"class":124},[110,3061,3062],{"class":120},"href",[110,3064,125],{"class":124},[110,3066,300],{"class":120},[110,3068,3069],{"class":124},"[",[110,3071,2203],{"class":120},[110,3073,3074],{"class":124},"].",[110,3076,3077],{"class":134},"toDataURL",[110,3079,227],{"class":124},[110,3081,3082,3084,3086,3089],{"class":112,"line":209},[110,3083,3002],{"class":120},[110,3085,131],{"class":124},[110,3087,3088],{"class":134},"click",[110,3090,227],{"class":124},[110,3092,3093],{"class":112,"line":216},[110,3094,353],{"class":124},[65,3096,3097,3100],{},[36,3098,3099],{},"ユーザーが ffmpeg などで動画に変換",[36,3101,3102],{},[107,3103,3104],{},"ffmpeg -framerate 10 -i frame-%03d.png output.gif",[29,3106,3108],{"id":3107},"_5-画面録画-apigetdisplaymedia","5. 画面録画 API（getDisplayMedia）",[100,3110,3112],{"className":102,"code":3111,"language":104,"meta":105,"style":105},"const stream = await navigator.mediaDevices.getDisplayMedia({ video: true });\nconst mediaRecorder = new MediaRecorder(stream);\n",[107,3113,3114,3148],{"__ignoreMap":105},[110,3115,3116,3118,3120,3122,3124,3127,3129,3132,3134,3137,3139,3142,3144,3146],{"class":112,"line":113},[110,3117,117],{"class":116},[110,3119,121],{"class":120},[110,3121,125],{"class":124},[110,3123,325],{"class":233},[110,3125,3126],{"class":120}," navigator",[110,3128,131],{"class":124},[110,3130,3131],{"class":120},"mediaDevices",[110,3133,131],{"class":124},[110,3135,3136],{"class":134},"getDisplayMedia",[110,3138,2890],{"class":124},[110,3140,3141],{"class":178}," video",[110,3143,182],{"class":124},[110,3145,1400],{"class":233},[110,3147,725],{"class":124},[110,3149,3150,3152,3154,3156,3158,3160,3162,3164],{"class":112,"line":148},[110,3151,117],{"class":116},[110,3153,153],{"class":120},[110,3155,125],{"class":124},[110,3157,158],{"class":116},[110,3159,161],{"class":134},[110,3161,138],{"class":124},[110,3163,166],{"class":120},[110,3165,145],{"class":124},[65,3167,3168,3171],{},[36,3169,3170],{},"ブラウザの画面を直接録画",[36,3172,3173],{},"ユーザーの許可が必要",[29,3175,3177],{"id":3176},"_6-サーバーサイドレンダリング","6. サーバーサイドレンダリング",[65,3179,3180,3183,3186],{},[36,3181,3182],{},"Node.js + Puppeteer でヘッドレスブラウザを使用",[36,3184,3185],{},"サーバー側で動画を生成",[36,3187,3188],{},"クライアントはダウンロードのみ",[56,3190],{},[14,3192,3193],{"id":3193},"使用ライブラリ",[3195,3196,3197,3215],"table",{},[3198,3199,3200],"thead",{},[3201,3202,3203,3207,3210,3213],"tr",{},[3204,3205,3206],"th",{},"ライブラリ",[3204,3208,3209],{},"バージョン",[3204,3211,3212],{},"用途",[3204,3214,734],{},[3216,3217,3218,3232,3246],"tbody",{},[3201,3219,3220,3223,3226,3229],{},[3221,3222,263],"td",{},[3221,3224,3225],{},"1.4.1",[3221,3227,3228],{},"DOM → Canvas",[3221,3230,3231],{},"処理が遅い",[3201,3233,3234,3237,3240,3243],{},[3221,3235,3236],{},"gif.js",[3221,3238,3239],{},"0.2.0",[3221,3241,3242],{},"GIF エンコード",[3221,3244,3245],{},"Worker が file:// で動かない",[3201,3247,3248,3251,3254,3256],{},[3221,3249,3250],{},"gifenc",[3221,3252,3253],{},"1.0.3",[3221,3255,3242],{},[3221,3257,3258],{},"パレット管理が難しい",[56,3260],{},[14,3262,3263],{"id":3263},"ファイル構成",[100,3265,3270],{"className":3266,"code":3268,"language":3269},[3267],"language-text","apps/web/content/2025-12-03/\n├── message-mockup.html    # メインHTML\n├── message-mockup.css     # スタイル\n├── message-mockup.js      # JavaScript\n├── gifenc.js              # GIF エンコーダー（ローカル）\n├── gif.worker.js          # gif.js Worker（未使用）\n└── mockup-development-log.md  # このドキュメント\n","text",[107,3271,3268],{"__ignoreMap":105},[56,3273],{},[14,3275,3276],{"id":3276},"結論",[29,3278,3279],{"id":3279},"最終的な解決策",[18,3281,3282,3285],{},[39,3283,3284],{},"プログレッシブDOM構築 + WebM動画出力"," で成功。",[65,3287,3288,3296,3299],{},[36,3289,3290,3292,3293,3295],{},[107,3291,263],{}," の ",[107,3294,1170],{}," キャプチャ問題を回避するため、要素を「隠す」のではなく「存在させない」アプローチを採用",[36,3297,3298],{},"GIF ではなく WebM 動画として出力（256色制限を回避）",[36,3300,3301,3304,3305,3308],{},[107,3302,3303],{},"canvas.captureStream(0)"," + ",[107,3306,3307],{},"MediaRecorder"," で動画を生成",[29,3310,3311],{"id":3311},"動作環境",[65,3313,3314,3323],{},[36,3315,3316,3319,3320,3322],{},[39,3317,3318],{},"ローカルサーバー必須",": ",[107,3321,549],{}," プロトコルでは一部機能が制限される",[36,3324,3325,3319,3328,3331,3332,3335],{},[39,3326,3327],{},"推奨",[107,3329,3330],{},"python -m http.server 8000"," または ",[107,3333,3334],{},"npx serve ."," でローカルサーバーを起動",[29,3337,3338],{"id":3338},"今後の改善候補",[33,3340,3341,3347,3353],{},[36,3342,3343,3346],{},[39,3344,3345],{},"Canvas直接描画に切り替える"," - html2canvas を使わず高速化",[36,3348,3349,3352],{},[39,3350,3351],{},"Webサーバーにデプロイ"," - ユーザーがサーバーを起動する必要がなくなる",[36,3354,3355,3358],{},[39,3356,3357],{},"MP4出力対応"," - WebM より互換性が高い（要サーバーサイド処理）",[1165,3360,3361],{},"html pre.shiki code .stQ0i, html code.shiki .stQ0i{--shiki-default:#AB5959;--shiki-dark:#AB5959}html pre.shiki code .s4oTP, html code.shiki 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