Created
March 27, 2015 10:49
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JS动画 // source http://jsbin.com/dotoga
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>JS动画</title> | |
| <style id="jsbin-css"> | |
| body{ | |
| padding-top:40px; | |
| } | |
| .square{ | |
| width:40px; | |
| height:40px; | |
| background: red; | |
| position:relative; | |
| } | |
| .run{ | |
| position: relative; | |
| top:15px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class="square j_square"></div> | |
| <button class="j_run run">点击运行</button> | |
| <script id="jsbin-javascript"> | |
| var startTime, | |
| duration=2000, | |
| startVal=0, | |
| targetVal=200, | |
| block=document.querySelector('.square'); | |
| function runAnimation(){ | |
| var currentTime=performance.now(), | |
| passedTime=currentTime-startTime, | |
| animateProgress=passedTime/duration, | |
| currentVal=startVal+(targetVal-startVal)*animateProgress; | |
| block.style.left=Math.round(currentVal)+'px'; | |
| if(currentVal < targetVal){ | |
| requestAnimationFrame(runAnimation); | |
| } | |
| } | |
| document.querySelector('.j_run').addEventListener('click',function(e){ | |
| startTime=performance.now(); | |
| runAnimation(); | |
| // requestAnimationFrame(runAnimation); | |
| }); | |
| </script> | |
| <script id="jsbin-source-css" type="text/css">body{ | |
| padding-top:40px; | |
| } | |
| .square{ | |
| width:40px; | |
| height:40px; | |
| background: red; | |
| position:relative; | |
| } | |
| .run{ | |
| position: relative; | |
| top:15px; | |
| }</script> | |
| <script id="jsbin-source-javascript" type="text/javascript">var startTime, | |
| duration=2000, | |
| startVal=0, | |
| targetVal=200, | |
| block=document.querySelector('.square'); | |
| function runAnimation(){ | |
| var currentTime=performance.now(), | |
| passedTime=currentTime-startTime, | |
| animateProgress=passedTime/duration, | |
| currentVal=startVal+(targetVal-startVal)*animateProgress; | |
| block.style.left=Math.round(currentVal)+'px'; | |
| if(currentVal < targetVal){ | |
| requestAnimationFrame(runAnimation); | |
| } | |
| } | |
| document.querySelector('.j_run').addEventListener('click',function(e){ | |
| startTime=performance.now(); | |
| runAnimation(); | |
| // requestAnimationFrame(runAnimation); | |
| });</script></body> | |
| </html> |
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| body{ | |
| padding-top:40px; | |
| } | |
| .square{ | |
| width:40px; | |
| height:40px; | |
| background: red; | |
| position:relative; | |
| } | |
| .run{ | |
| position: relative; | |
| top:15px; | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| var startTime, | |
| duration=2000, | |
| startVal=0, | |
| targetVal=200, | |
| block=document.querySelector('.square'); | |
| function runAnimation(){ | |
| var currentTime=performance.now(), | |
| passedTime=currentTime-startTime, | |
| animateProgress=passedTime/duration, | |
| currentVal=startVal+(targetVal-startVal)*animateProgress; | |
| block.style.left=Math.round(currentVal)+'px'; | |
| if(currentVal < targetVal){ | |
| requestAnimationFrame(runAnimation); | |
| } | |
| } | |
| document.querySelector('.j_run').addEventListener('click',function(e){ | |
| startTime=performance.now(); | |
| runAnimation(); | |
| // requestAnimationFrame(runAnimation); | |
| }); |
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