Created
July 24, 2015 17:11
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Clipboard API で遊ぶよ! https://w3c.github.io/clipboard-apis/
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| if (!(String.prototype.startsWith)) { | |
| String.prototype.startsWith = function (s) { | |
| return this.slice(0, s.length) === s; | |
| }; | |
| } | |
| function output(url) { | |
| var out = document.getElementById('output'); | |
| var img = new Image(); | |
| img.src = url; | |
| img.addEventListener('load', function () { | |
| out.appendChild(img); | |
| }, false); | |
| } | |
| function processBlob(blob) { | |
| var reader = new FileReader(); | |
| reader.addEventListener('load', function (ev) { | |
| output(ev.target.result); | |
| }, false); | |
| reader.readAsDataURL(blob); | |
| } | |
| function handler(ev) { | |
| var items = ev.clipboardData.items; | |
| Array.prototype.forEach.call(items, function (item) { | |
| if (!item.type.startsWith('image/')) { | |
| return; | |
| } | |
| var blob = item.getAsFile(); | |
| processBlob(blob); | |
| }); | |
| } | |
| document.addEventListener('paste', handler, false); |
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| <!doctype html> | |
| <html lang="ja"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <style> | |
| img, canvas { | |
| display: block; | |
| border: 3px dotted #aaa; | |
| } | |
| </style> | |
| <title>Clipboard API で遊ぶよ!</title> | |
| </head> | |
| <body> | |
| <h1>Clipboard API で遊ぶよ!</h1> | |
| <h2>説明</h2> | |
| <p><kbd>PrintScreen</kbd> を押した後、<kbd>Ctrl + V</kbd> とかで貼り付けてみるといいと思います。</p> | |
| <h2>出力</h2> | |
| <div id="output"></div> | |
| <script src="clipboard.js"></script> | |
| </body> | |
| </html> |
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