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<html><head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width"> <title>canvas drawImage DEMO</title> <style> canvas { border: 5px solid #0ff; } </style></head><body> <canvas id="J_Canvas" width="680" height="500"></canvas></body><script>let ctx = document.getElementById('J_Canvas').getContext('2d')let img = new Image()img.src = 'http://7xp4vm.com1.z0.glb.clouddn.com/y.jpg'img.onload = () => { // 将img按原尺寸绘制在canvas指定位置(0, 0) ctx.drawImage(img, 0, 0) // 将img按100x120原图比例大小绘制在canvas指定位置(410, 0) ctx.drawImage(img, 410, 0, 100, 120) // 将img拉伸变形绘制 ctx.drawImage(img, 520, 0, 150, 120) // 将img的一部分等比绘制在canvas ctx.drawImage(img, 50, 80, 260, 200, 410, 130, 260, 200) // 将img的一部分2倍绘制在canvas ctx.drawImage(img, 160, 130, 130, 80, 410, 340, 260, 160)} </script></html>
Output
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Keyboard Shortcuts
| Shortcut | Action |
|---|---|
| ctrl + [num] | Toggle nth panel |
| ctrl + 0 | Close focused panel |
| ctrl + enter | Re-render output. If console visible: run JS in console |
| Ctrl + l | Clear the console |
| ctrl + / | Toggle comment on selected lines |
| ctrl + ] | Indents selected lines |
| ctrl + [ | Unindents selected lines |
| tab | Code complete & Emmet expand |
| ctrl + shift + L | Beautify code in active panel |
| ctrl + s | Save & lock current Bin from further changes |
| ctrl + shift + s | Open the share options |
| ctrl + y | Archive Bin |
Complete list of JS Bin shortcuts | |
JS Bin URLs
| URL | Action |
|---|---|
| / | Show the full rendered output. This content will update in real time as it's updated from the /edit url. |
| /edit | Edit the current bin |
| /watch | Follow a Code Casting session |
| /embed | Create an embeddable version of the bin |
| /latest | Load the very latest bin (/latest goes in place of the revision) |
| /[username]/last | View the last edited bin for this user |
| /[username]/last/edit | Edit the last edited bin for this user |
| /[username]/last/watch | Follow the Code Casting session for the latest bin for this user |
| /quiet | Remove analytics and edit button from rendered output |
| .js | Load only the JavaScript for a bin |
| .css | Load only the CSS for a bin |
Except for username prefixed urls, the url may start with http://jsbin.com/abc and the url fragments can be added to the url to view it differently. | |
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