点击页面出现爱心效果的源码(转载学习)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | ( function (window,document,undefined){ var hearts = []; window.requestAnimationFrame = ( function (){ return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback){ setTimeout(callback,1000/60); } })(); init(); function init(){ css( ".heart{width: 10px;height: 10px;position: fixed;background: #f00;transform: rotate(45deg);-webkit-transform: rotate(45deg);-moz-transform: rotate(45deg);}.heart:after,.heart:before{content: '';width: inherit;height: inherit;background: inherit;border-radius: 50%;-webkit-border-radius: 50%;-moz-border-radius: 50%;position: absolute;}.heart:after{top: -5px;}.heart:before{left: -5px;}" ); attachEvent(); gameloop(); } function gameloop(){ for ( var i=0;i<hearts.length;i++){ if (hearts[i].alpha <=0){ document.body.removeChild(hearts[i].el); hearts.splice(i,1); continue ; } hearts[i].y--; hearts[i].scale += 0.004; hearts[i].alpha -= 0.013; hearts[i].el.style.cssText = "left:" +hearts[i].x+ "px;top:" +hearts[i].y+ "px;opacity:" +hearts[i].alpha+ ";transform:scale(" +hearts[i].scale+ "," +hearts[i].scale+ ") rotate(45deg);background:" +hearts[i].color; } requestAnimationFrame(gameloop); } function attachEvent(){ var old = typeof window.onclick=== "function" && window.onclick; window.onclick = function (event){ old && old(); createHeart(event); } } function createHeart(event){ var d = document.createElement( "div" ); d.className = "heart" ; hearts.push({ el : d, x : event.clientX - 5, y : event.clientY - 5, scale : 1, alpha : 1, color : randomColor() }); document.body.appendChild(d); } function css(css){ var style = document.createElement( "style" ); style.type= "text/css" ; try { style.appendChild(document.createTextNode(css)); } catch (ex){ style.styleSheet.cssText = css; } document.getElementsByTagName( 'head' )[0].appendChild(style); } function randomColor(){ return "rgb(" +(~~(Math.random()*255))+ "," +(~~(Math.random()*255))+ "," +(~~(Math.random()*255))+ ")" ; } })(window,document); |
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愿你一寸一寸地攻城略地,一点一点地焕然一新
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分类:
JavaScript
, Web development
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