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January 15, 2020 16:32
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ニコニコの動画をコメント付きでキャプチャして新しいタブに表示するブックマークレット
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| javascript: (() => { | |
| const video = document.querySelector('video'); | |
| if (video) { | |
| var canvas = document.createElement('canvas'); | |
| var comment = document.querySelectorAll('canvas')[1]; | |
| if (comment.width > video.videoWidth){ | |
| canvas.width = comment.width; | |
| canvas.height = comment.height; | |
| } else { | |
| canvas.width = video.videoWidth; | |
| canvas.height = video.videoHeight; | |
| } | |
| canvas.getContext('2d').drawImage(video, 0, 0, canvas.width, canvas.height); | |
| canvas.getContext('2d').drawImage(comment, 0, 0, canvas.width, canvas.height); | |
| canvas.toBlob(function(blob){ | |
| image = URL.createObjectURL(blob); | |
| html = window.open(); | |
| html.document.write( | |
| `<!Doctype html> | |
| <html> | |
| <head> | |
| <title>Capture Image</title> | |
| </head> | |
| <body style="margin: 0px; background: #000000;"> | |
| <img style="display:block; margin: 0px auto; height: 100vh;" src="` + image + `"> | |
| </body> | |
| </html>`); | |
| html.window.stop(); | |
| }, 'image/png', 1); | |
| } else { | |
| alert('動画が見つかりません。'); | |
| } | |
| })(); | |
| void 0; |
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