{"id":748,"date":"2024-07-03T13:09:24","date_gmt":"2024-07-03T05:09:24","guid":{"rendered":"https:\/\/levin.ink\/?p=748"},"modified":"2024-07-03T13:09:24","modified_gmt":"2024-07-03T05:09:24","slug":"js-3-20-%e5%8a%a8%e7%94%bb","status":"publish","type":"post","link":"https:\/\/levin.ink\/?p=748","title":{"rendered":"JS &#8211; 3-20 \u52a8\u753b"},"content":{"rendered":"<h1>\u8d1d\u585e\u5c14\u66f2\u7ebf<\/h1>\n<p>\u8d1d\u585e\u5c14\u66f2\u7ebf\u7528\u4e8e\u8ba1\u7b97\u673a\u56fe\u5f62\u7ed8\u5236\u5f62\u72b6\uff0cCSS \u52a8\u753b\u548c\u8bb8\u591a\u5176\u4ed6\u5730\u65b9\u3002<\/p>\n<h2>\u63a7\u5236\u70b9<\/h2>\n<p><a href=\"https:\/\/en.wikipedia.org\/wiki\/B%C3%A9zier_curve\">\u8d1d\u585e\u5c14\u66f2\u7ebf<\/a>\u7531\u63a7\u5236\u70b9\u5b9a\u4e49\u3002<\/p>\n<ol>\n<li><strong>\u63a7\u5236\u70b9\u4e0d\u603b\u662f\u5728\u66f2\u7ebf\u4e0a<\/strong>\u8fd9\u662f\u975e\u5e38\u6b63\u5e38\u7684\uff0c\u7a0d\u540e\u6211\u4eec\u5c06\u770b\u5230\u66f2\u7ebf\u662f\u5982\u4f55\u6784\u5efa\u7684\u3002<\/li>\n<li><strong>\u66f2\u7ebf\u7684\u9636\u6b21\u7b49\u4e8e\u63a7\u5236\u70b9\u7684\u6570\u91cf\u51cf\u4e00<\/strong>\u3002 \u5bf9\u4e8e\u4e24\u4e2a\u70b9\u6211\u4eec\u80fd\u5f97\u5230\u4e00\u6761\u7ebf\u6027\u66f2\u7ebf\uff08\u76f4\u7ebf\uff09\uff0c\u4e09\u4e2a\u70b9 \u2014 \u4e00\u6761\u4e8c\u9636\u66f2\u7ebf\uff0c\u56db\u4e2a\u70b9 \u2014 \u4e00\u6761\u4e09\u9636\u66f2\u7ebf\u3002<\/li>\n<li><strong>\u66f2\u7ebf\u603b\u662f\u5728\u63a7\u5236\u70b9\u7684<a href=\"https:\/\/en.wikipedia.org\/wiki\/Convex_hull\">\u51f8\u5305<\/a>\u5185\u90e8\uff1a<\/strong><br \/>\n<div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/levin.ink\/wp-content\/uploads\/2024\/07\/Pasted-image-20240703104759.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/levin.ink\/wp-content\/uploads\/2024\/07\/Pasted-image-20240703104759.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"Pasted image 20240703104759.png\"><\/div><br 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href=\"https:\/\/en.wikipedia.org\/wiki\/De_Casteljau%27s_algorithm\">\u5fb7\u5361\u65af\u7279\u91cc\u5965\u7b97\u6cd5<\/a>\u4e0e\u66f2\u7ebf\u7684\u6570\u5b66\u5b9a\u4e49\u76f8\u540c\uff0c\u4f46\u76f4\u89c2\u5730\u663e\u793a\u4e86\u66f2\u7ebf\u662f\u5982\u4f55\u88ab\u5efa\u7acb\u7684\u3002<br \/>\n<strong>\u5fb7\u5361\u65af\u7279\u91cc\u5965\u7b97\u6cd5\u6784\u9020\u4e09\u70b9\u8d1d\u585e\u5c14\u66f2\u7ebf\uff1a<\/strong><\/p>\n<ol>\n<li>\u7ed8\u5236\u63a7\u5236\u70b9\u3002\u5728\u4e0a\u9762\u7684\u6f14\u793a\u4e2d\uff0c\u5b83\u4eec\u6807\u6709\uff1a<code>1<\/code>\u3001<code>2<\/code>\u00a0\u548c\u00a0<code>3<\/code>\u3002<\/li>\n<li>\u521b\u5efa\u63a7\u5236\u70b9 1 \u2192 2 \u2192 3 \u95f4\u7684\u7ebf\u6bb5. \u5728\u4e0a\u9762\u7684\u6f14\u793a\u4e2d\u5b83\u4eec\u662f\u68d5\u8272\u7684\u3002<\/li>\n<li>\u53c2\u6570\u00a0<code>t<\/code>\u00a0\u4ece\u00a0<code>0<\/code>\u00a0to\u00a0<code>1<\/code>\u00a0\u53d8\u5316\u3002 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\u7ebf\u6bb5\u7ec8\u70b9\u3002<\/li>\n<li>\u8fde\u63a5\u8fd9\u4e9b\u70b9\uff0c\u4e0b\u9762\u8fd9\u5f20\u56fe\u4e2d\u8fde\u597d\u7684\u7ebf\u88ab\u7ed8\u5236\u6210\u84dd\u8272\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/levin.ink\/wp-content\/uploads\/2024\/07\/Pasted-image-20240703105127.png\" alt=\"Pasted image 20240703105127.png\"><\/li>\n<\/ul>\n<\/li>\n<li>\u73b0\u5728\u5728\u84dd\u8272\u7ebf\u6bb5\u4e0a\u53d6\u4e00\u4e2a\u70b9\uff0c\u8ddd\u79bb\u6bd4\u4f8b\u53d6\u76f8\u540c\u6570\u503c\u7684\u00a0<code>t<\/code>\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5f53\u00a0<code>t=0.25<\/code>\uff08\u5de6\u56fe\uff09\u65f6\uff0c\u6211\u4eec\u53d6\u5230\u7684\u70b9\u4f4d\u4e8e\u7ebf\u6bb5\u7684\u5de6 1\/4 \u7ec8\u70b9\u5904\uff0c\u5f53\u00a0<code>t=0.5<\/code>\uff08\u53f3\u56fe\uff09\u65f6 \u2014 \u7ebf\u6bb5\u4e2d\u95f4\u3002\u5728\u4e0a\u56fe\u4e2d\u8fd9\u4e00\u70b9\u662f\u7ea2\u8272\u7684\u3002<\/li>\n<li>\u968f\u7740\u00a0<code>t<\/code>\u00a0\u4ece\u00a0<code>0<\/code>\u00a0to\u00a0<code>1<\/code>\u00a0\u53d8\u5316\uff0c\u6bcf\u4e00\u4e2a\u00a0<code>t<\/code>\u00a0\u7684\u503c\u90fd\u4f1a\u6dfb\u52a0\u4e00\u4e2a\u70b9\u5230\u66f2\u7ebf\u4e0a\u3002\u8fd9\u4e9b\u70b9\u7684\u96c6\u5408\u5c31\u5f62\u6210\u7684\u8d1d\u585e\u5c14\u66f2\u7ebf\u3002\u5b83\u5728\u4e0a\u9762\u7684\u56fe\u4e2d\u662f\u7ea2\u8272\u7684\uff0c\u5e76\u4e14\u662f\u629b\u7269\u7ebf\u72b6\u7684\u3002<br \/>\n\u5bf9\u4e8e 4 \u4e2a\u70b9<br \/>\n\u7b97\u6cd5\uff1a<\/li>\n<\/ol>\n<ul>\n<li>\u63a7\u5236\u70b9\u901a\u8fc7\u7ebf\u6bb5\u8fde\u63a5\uff1a1 \u2192 2\u30012 \u2192 3 \u548c 3 \u2192 4\u3002 \u6211\u4eec\u80fd\u5f97\u5230 3 \u6761\u68d5\u8272\u7684\u7ebf\u6bb5\u3002<\/li>\n<li>\u5bf9\u4e8e\u00a0<code>0<\/code>\u00a0to\u00a0<code>1<\/code>\u00a0\u4e4b\u95f4\u7684\u6bcf\u4e00\u4e2a\u00a0<code>t<\/code>\uff1a\n<ul>\n<li>\u6211\u4eec\u5728\u8fd9\u4e9b\u7ebf\u6bb5\u4e0a\u8ddd\u8d77\u70b9\u8ddd\u79bb\u6bd4\u4f8b\u4e3a\u00a0<code>t<\/code>\u00a0\u7684\u4f4d\u7f6e\u53d6\u70b9\u3002\u628a\u8fd9\u4e9b\u70b9\u8fde\u63a5\u8d77\u6765\uff0c\u7136\u540e\u5f97\u5230\u4e24\u6761\u7eff\u8272\u7ebf\u6bb5\u3002<\/li>\n<li>\u5728\u8fd9\u4e9b\u7ebf\u6bb5\u4e0a\u540c\u6837\u6309\u6bd4\u4f8b\u00a0<code>t<\/code>\u00a0\u53d6\u70b9\uff0c\u5f97\u5230\u4e00\u6761\u84dd\u8272\u7ebf\u6bb5\u3002<\/li>\n<li>\u5728\u84dd\u8272\u7ebf\u6bb5\u6309\u6bd4\u4f8b\u00a0<code>t<\/code>\u00a0\u53d6\u70b9\u3002\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\u662f\u7ea2\u8272\u7684\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd9\u4e9b\u70b9\u5728\u4e00\u8d77\u7ec4\u6210\u4e86\u66f2\u7ebf\u3002<br \/>\n\u8be5\u7b97\u6cd5\u662f\u9012\u5f52\u7684\uff0c\u5e76\u4e14\u53ef\u4ee5\u9002\u5e94\u4e8e\u4efb\u610f\u6570\u91cf\u7684\u63a7\u5236\u70b9\u3002<br \/>\n\u7ed9\u5b9a N \u4e2a\u63a7\u5236\u70b9\uff0c\u6211\u4eec\u5c06\u5b83\u4eec\u8fde\u63a5\u8d77\u6765\u4ee5\u83b7\u5f97\u521d\u59cb\u7684 N-1 \u4e2a\u7ebf\u6bb5\u3002<br \/>\n\u7136\u540e\u5bf9\u4ece\u00a0<code>0<\/code>\u00a0\u5230\u00a0<code>1<\/code>\u00a0\u7684\u6bcf\u4e00\u4e2a\u00a0<code>t<\/code>\uff1a<\/li>\n<li>\u5728\u6bcf\u6761\u7ebf\u6bb5\u4e0a\u6309\u00a0<code>t<\/code>\u00a0\u6bd4\u4f8b\u8ddd\u79bb\u53d6\u4e00\u4e2a\u70b9\u5e76\u4e14\u8fde\u63a5 \u2014\u2014 \u4f1a\u5f97\u5230 N-2 \u4e2a\u7ebf\u6bb5\u3002<\/li>\n<li>\u5728\u4e0a\u9762\u5f97\u5230\u7684\u6bcf\u6761\u7ebf\u6bb5\u4e0a\u6309\u00a0<code>t<\/code>\u00a0\u6bd4\u4f8b\u8ddd\u79bb\u53d6\u4e00\u4e2a\u70b9\u5e76\u4e14\u8fde\u63a5 \u2014\u2014 \u4f1a\u5f97\u5230 N-3 \u4e2a\u7ebf\u6bb5\uff0c\u4ee5\u6b64\u7c7b\u63a8\u2026\u2026<\/li>\n<li>\u76f4\u5230\u6211\u4eec\u5f97\u5230\u4e00\u4e2a\u70b9\u3002\u5f97\u5230\u7684\u8fd9\u4e9b\u70b9\u5c31\u5f62\u6210\u4e86\u66f2\u7ebf\u3002<\/li>\n<\/ul>\n<h1>CSS \u52a8\u753b<\/h1>\n<p>CSS \u52a8\u753b\u53ef\u4ee5\u5728\u4e0d\u501f\u52a9 Javascript \u7684\u60c5\u51b5\u4e0b\u505a\u51fa\u4e00\u4e9b\u7b80\u5355\u7684\u52a8\u753b\u6548\u679c\u3002<\/p>\n<h2>transition<\/h2>\n<p>CSS \u63d0\u4f9b\u4e86\u56db\u4e2a\u5c5e\u6027\u6765\u63cf\u8ff0\u4e00\u4e2a\u8fc7\u6e21\uff1a<\/p>\n<ul>\n<li><code>transition-property<\/code><\/li>\n<li><code>transition-duration<\/code><\/li>\n<li><code>transition-timing-function<\/code><\/li>\n<li><code>transition-delay<\/code><\/li>\n<\/ul>\n<h3>transition-property<\/h3>\n<p>\u5728\u00a0<code>transition-property<\/code>\u00a0\u4e2d\u6211\u4eec\u53ef\u4ee5\u5217\u4e3e\u8981\u8bbe\u7f6e\u52a8\u753b\u7684\u6240\u6709\u5c5e\u6027\uff0c\u5982\uff1a<code>left\u3001margin-left\u3001height \u548c color<\/code>\u3002<br \/>\n\u4e0d\u662f\u6240\u6709\u7684 CSS \u5c5e\u6027\u90fd\u53ef\u4ee5\u4f7f\u7528\u8fc7\u6e21\u52a8\u753b\uff0c\u4f46\u662f\u5b83\u4eec\u4e2d\u7684<a href=\"http:\/\/www.w3.org\/TR\/css3-transitions\/#animatable-properties-\">\u5927\u591a\u6570<\/a>\u90fd\u662f\u53ef\u4ee5\u7684\u3002<code>all<\/code>\u00a0\u8868\u793a\u5e94\u7528\u5728\u6240\u6709\u5c5e\u6027\u4e0a\u3002<\/p>\n<h3>transition-duration<\/h3>\n<p><code>transition-duration<\/code>\u00a0\u5141\u8bb8\u6211\u4eec\u6307\u5b9a\u52a8\u753b\u6301\u7eed\u7684\u65f6\u95f4\u3002\u65f6\u95f4\u7684\u683c\u5f0f\u53c2\u7167\u00a0<a href=\"http:\/\/www.w3.org\/TR\/css3-values\/#time\">CSS \u65f6\u95f4\u683c\u5f0f<\/a>\uff1a\u5355\u4f4d\u4e3a\u79d2\u00a0<code>s<\/code>\u00a0\u6216\u8005\u6beb\u79d2\u00a0<code>ms<\/code>\u3002<\/p>\n<h3>transition-delay<\/h3>\n<p><code>transition-delay<\/code>\u00a0\u5141\u8bb8\u6211\u4eec\u8bbe\u5b9a\u52a8\u753b<strong>\u5f00\u59cb\u524d<\/strong>\u7684\u5ef6\u8fdf\u65f6\u95f4\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u00a0<code>transition-delay: 1s<\/code>\uff0c\u52a8\u753b\u5c06\u4f1a\u5728\u5c5e\u6027\u53d8\u5316\u53d1\u751f 1 \u79d2\u540e\u5f00\u59cb\u6e32\u67d3\u3002<br \/>\n\u4f60\u4e5f\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a<strong>\u8d1f\u503c<\/strong>\u3002\u90a3\u4e48\u52a8\u753b\u5c06\u4f1a\u4ece\u6574\u4e2a\u8fc7\u6e21\u7684\u4e2d\u95f4\u65f6\u523b\u5f00\u59cb\u6e32\u67d3\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u00a0<code>transition-duration: 2s<\/code>\uff0c\u540c\u65f6\u628a\u00a0<code>delay<\/code>\u00a0\u8bbe\u7f6e\u4e3a\u00a0<code>-1s<\/code>\uff0c\u90a3\u4e48\u8fd9\u4e2a\u52a8\u753b\u5c06\u4f1a\u6301\u7eed 1 \u79d2\u949f\uff0c\u5e76\u4e14\u4ece\u6b63\u4e2d\u95f4\u5f00\u59cb\u6e32\u67d3\u3002<\/p>\n<blockquote>\n<p>\u8d1f\u503c\u6709\u65f6\u53ef\u4ee5\u7b80\u5316js\u52a8\u753b\u4ee3\u7801<\/p>\n<\/blockquote>\n<h3>transition-timing-function<\/h3>\n<p>\u65f6\u95f4\u51fd\u6570\u63cf\u8ff0\u4e86\u52a8\u753b\u8fdb\u7a0b\u5728\u65f6\u95f4\u4e0a\u7684\u5206\u5e03\u3002\u5b83\u662f\u5148\u6162\u540e\u5feb\u8fd8\u662f\u5148\u5feb\u540e\u6162\uff1f<br \/>\n\u8fd9\u4e2a\u5c5e\u6027\u63a5\u53d7\u4e24\u79cd\u503c\uff1a\u4e00\u4e2a\u8d1d\u585e\u5c14\u66f2\u7ebf\uff08Bezier curve\uff09\u6216\u8005\u9636\u8dc3\u51fd\u6570\uff08steps\uff09\u3002\u6211\u4eec\u5148\u4ece\u8d1d\u585e\u5c14\u66f2\u7ebf\u5f00\u59cb\uff0c\u8fd9\u4e5f\u662f\u8f83\u4e3a\u5e38\u7528\u7684\u3002<\/p>\n<h4>\u8d1d\u585e\u5c14\u66f2\u7ebf<\/h4>\n<p>\u65f6\u95f4\u51fd\u6570\u53ef\u4ee5\u7528<a href=\"https:\/\/zh.javascript.info\/bezier-curve\">\u8d1d\u585e\u5c14\u66f2\u7ebf<\/a>\u63cf\u8ff0\uff0c\u901a\u8fc7\u8bbe\u7f6e\u56db\u4e2a\u6ee1\u8db3\u4ee5\u4e0b\u6761\u4ef6\u7684\u63a7\u5236\u70b9\uff1a<\/p>\n<ol>\n<li>\u7b2c\u4e00\u4e2a\u5e94\u4e3a\uff1a<code>(0,0)<\/code>\u3002<\/li>\n<li>\u6700\u540e\u4e00\u4e2a\u5e94\u4e3a\uff1a<code>(1,1)<\/code>\u3002<\/li>\n<li>\u5bf9\u4e8e\u4e2d\u95f4\u503c\uff0c<code>x<\/code>\u00a0\u5fc5\u987b\u4f4d\u4e8e\u00a0<code>0..1<\/code>\u00a0\u4e4b\u95f4\uff0c<code>y<\/code>\u00a0\u53ef\u4ee5\u4e3a\u4efb\u610f\u503c\u3002<br \/>\nCSS \u4e2d\u8bbe\u7f6e\u4e00\u8d1d\u585e\u5c14\u66f2\u7ebf\u7684\u8bed\u6cd5\u4e3a\uff1a<code>cubic-bezier(x2, y2, x3, y3)<\/code>\u3002\u8fd9\u91cc\u6211\u4eec\u53ea\u9700\u8981\u8bbe\u7f6e\u7b2c\u4e8c\u4e2a\u548c\u7b2c\u4e09\u4e2a\u503c\uff0c\u56e0\u4e3a\u7b2c\u4e00\u4e2a\u70b9\u56fa\u5b9a\u4e3a\u00a0<code>(0,0)<\/code>\uff0c\u7b2c\u56db\u4e2a\u70b9\u56fa\u5b9a\u4e3a\u00a0<code>(1,1)<\/code>\u3002<br \/>\n\u65f6\u95f4\u51fd\u6570\u63cf\u8ff0\u4e86\u52a8\u753b\u8fdb\u884c\u7684\u5feb\u6162\u3002<\/li>\n<\/ol>\n<ul>\n<li><code>x<\/code>\u00a0\u8f74\u8868\u793a\u65f6\u95f4\uff1a<code>0<\/code>\u00a0\u2014\u2014 \u5f00\u59cb\u65f6\u523b\uff0c<code>1<\/code>\u00a0\u2014\u2014\u00a0<code>transition-duration<\/code>\u7684\u7ed3\u675f\u65f6\u523b\u3002<\/li>\n<li><code>y<\/code>\u00a0\u8f74\u8868\u793a\u8fc7\u7a0b\u7684\u5b8c\u6210\u5ea6\uff1a<code>0<\/code>\u00a0\u2014\u2014 \u5c5e\u6027\u7684\u8d77\u59cb\u503c\uff0c<code>1<\/code>\u00a0\u2014\u2014 \u5c5e\u6027\u7684\u6700\u7ec8\u503c\u3002<br \/>\nCSS \u63d0\u4f9b\u51e0\u6761\u5185\u5efa\u7684\u66f2\u7ebf\uff1a<code>linear<\/code>\u3001<code>ease<\/code>\u3001<code>ease-in<\/code>\u3001<code>ease-out<\/code>\u00a0\u548c\u00a0<code>ease-in-out<\/code>\u3002<br \/>\n<strong>\u8d1d\u585e\u5c14\u66f2\u7ebf\u53ef\u4ee5\u4f7f\u52a8\u753b\u300e\u8d85\u51fa\u300f\u5176\u539f\u672c\u7684\u8303\u56f4\u3002<\/strong><br \/>\n\u66f2\u7ebf\u4e0a\u7684\u63a7\u5236\u70b9\u7684\u00a0<code>y<\/code>\u00a0\u503c\u53ef\u4ee5\u4f7f\u4efb\u610f\u7684\uff1a\u4e0d\u7ba1\u662f\u8d1f\u503c\u8fd8\u662f\u4e00\u4e2a\u5f88\u5927\u7684\u503c\u3002\u5982\u6b64\uff0c\u8d1d\u585e\u5c14\u66f2\u7ebf\u5c31\u4f1a\u53d8\u5f97\u5f88\u4f4e\u6216\u8005\u5f88\u9ad8\uff0c\u8ba9\u52a8\u753b\u8d85\u51fa\u5176\u6b63\u5e38\u7684\u8303\u56f4\u3002<br \/>\n\u4f46\u662f\uff0c\u5982\u4f55\u9488\u5bf9\u7279\u5b9a\u7684\u4efb\u52a1\u5bfb\u627e\u5230\u5408\u9002\u7684\u8d1d\u585e\u5c14\u66f2\u7ebf\u5462\uff1f\u4e8b\u5b9e\u4e0a\uff0c\u6709\u5f88\u591a\u5de5\u5177\u53ef\u4ee5\u5e2e\u5230\u4f60\u3002\u6bd4\u65b9\u8bf4\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u8fd9\u4e2a\u7f51\u7ad9\uff1a<a href=\"http:\/\/cubic-bezier.com\/\">http:\/\/cubic-bezier.com\/<\/a>\u3002<\/li>\n<\/ul>\n<h4>\u9636\u8dc3\u51fd\u6570<\/h4>\n<p>\u65f6\u95f4\u51fd\u6570\u00a0<code>steps(number of steps[, start\/end])<\/code>\u00a0\u5141\u8bb8\u4f60\u8ba9\u52a8\u753b\u5206\u6bb5\u8fdb\u884c\uff0c<code>number of steps<\/code>\u00a0\u8868\u793a\u9700\u8981\u62c6\u5206\u4e3a\u591a\u5c11\u6bb5\u3002<br \/>\n<code>steps<\/code>\u00a0\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u8868\u793a\u6bb5\u6570\u3002\u65f6\u95f4\u95f4\u9694\u4e5f\u4f1a\u4ee5\u540c\u6837\u7684\u65b9\u5f0f\u88ab\u62c6\u5206<br \/>\n\u7b2c\u4e8c\u4e2a\u53c2\u6570\u53ef\u4ee5\u53d6\u00a0<code>start<\/code>\u00a0\u6216\u00a0<code>end<\/code>\u00a0\u4e24\u8005\u5176\u4e00\u3002<br \/>\n<code>start<\/code>\u00a0\u8868\u793a\u5728\u52a8\u753b\u5f00\u59cb\u65f6\uff0c\u6211\u4eec\u9700\u8981\u7acb\u5373\u5f00\u59cb\u7b2c\u4e00\u6bb5\u7684\u52a8\u753b\u3002<br \/>\n\u53e6\u4e00\u4e2a\u503c\u00a0<code>end<\/code>\u00a0\u8868\u793a\uff1a\u6539\u53d8\u4e0d\u5e94\u8be5\u5728\u6700\u5f00\u59cb\u7684\u65f6\u5019\u53d1\u751f\uff0c\u800c\u662f\u53d1\u751f\u5728\u6bcf\u4e00\u6bb5\u7684\u6700\u540e\u65f6\u523b\u3002<br \/>\n\u53e6\u5916\u8fd8\u6709\u4e00\u4e9b\u7b80\u5199\u503c\uff1a<\/p>\n<ul>\n<li><code>step-start<\/code>\u00a0\u2014\u2014 \u7b49\u540c\u4e8e\u00a0<code>steps(1, start)<\/code>\u3002\u5373\uff1a\u52a8\u753b\u7acb\u523b\u5f00\u59cb\uff0c\u5e76\u4e14\u53ea\u6709\u4e00\u6bb5\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4f1a\u7acb\u523b\u5f00\u59cb\uff0c\u7d27\u63a5\u7740\u5c31\u7ed3\u675f\u4e86\uff0c\u5b9b\u5982\u6ca1\u6709\u52a8\u753b\u4e00\u6837\u3002<\/li>\n<li><code>step-end<\/code>\u00a0\u2014\u2014 \u7b49\u540c\u4e8e\u00a0<code>steps(1, end)<\/code>\u3002\u5373\uff1a\u5728\u00a0<code>transition-duration<\/code>\u00a0\u7ed3\u675f\u65f6\u751f\u6210\u4e00\u6bb5\u52a8\u753b\u3002<\/li>\n<\/ul>\n<h2>transitionend \u4e8b\u4ef6<\/h2>\n<p>CSS \u52a8\u753b\u5b8c\u6210\u540e\uff0c\u4f1a\u89e6\u53d1\u00a0<code>transitionend<\/code>\u00a0\u4e8b\u4ef6\u3002<br \/>\n\u8fd9\u88ab\u5e7f\u6cdb\u7528\u4e8e\u5728\u52a8\u753b\u7ed3\u675f\u540e\u6267\u884c\u67d0\u79cd\u64cd\u4f5c\u3002\u6211\u4eec\u4e5f\u53ef\u4ee5\u7528\u5b83\u6765\u4e32\u8054\u52a8\u753b\u3002<br \/>\n\u52a8\u753b\u901a\u8fc7\u00a0<code>go<\/code>\u00a0\u51fd\u6570\u521d\u59cb\u5316\uff0c\u5e76\u4e14\u5728\u6bcf\u6b21\u52a8\u753b\u5b8c\u6210\u540e\u90fd\u4f1a\u91cd\u590d\u6267\u884c\uff0c\u5e76\u8f6c\u53d8\u65b9\u5411\uff1a<\/p>\n<pre><code class=\"language-js\">boat.onclick = function() {\n  \/\/...\n  let times = 1;\n\n  function go() {\n    if (times % 2) {\n      \/\/ \u5411\u53f3\u79fb\u52a8\n      boat.classList.remove('back');\n      boat.style.marginLeft = 100 * times + 200 + 'px';\n    } else {\n      \/\/ \u5411\u5de6\u79fb\u52a8\n      boat.classList.add('back');\n      boat.style.marginLeft = 100 * times - 200 + 'px';\n    }\n\n  }\n\n  go();\n\n  boat.addEventListener('transitionend', function() {\n    times++;\n    go();\n  });\n};\n<\/code><\/pre>\n<p><code>transitionend<\/code>\u00a0\u7684\u4e8b\u4ef6\u5bf9\u8c61\u6709\u51e0\u4e2a\u7279\u5b9a\u7684\u5c5e\u6027\uff1a<br \/>\n<code>event.propertyName<\/code>\u00a0\uff1a\u5f53\u524d\u5b8c\u6210\u52a8\u753b\u7684\u5c5e\u6027\uff0c\u8fd9\u5728\u6211\u4eec\u540c\u65f6\u4e3a\u591a\u4e2a\u5c5e\u6027\u52a0\u4e0a\u52a8\u753b\u65f6\u4f1a\u5f88\u6709\u7528\u3002<br \/>\n<code>event.elapsedTime<\/code>\u00a0\uff1a\u52a8\u753b\u5b8c\u6210\u7684\u65f6\u95f4\uff08\u6309\u79d2\u8ba1\u7b97\uff09\uff0c\u4e0d\u5305\u62ec\u00a0<code>transition-delay<\/code>\u3002<\/p>\n<h2>\u5173\u952e\u5e27\u52a8\u753b<\/h2>\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7 CSS \u63d0\u4f9b\u7684\u00a0<code>@keyframes<\/code>\u00a0\u89c4\u5219\u6574\u5408\u591a\u4e2a\u7b80\u5355\u7684\u52a8\u753b\u3002<br \/>\n\u5b83\u4f1a\u6307\u5b9a\u67d0\u4e2a\u52a8\u753b\u7684\u540d\u79f0\u4ee5\u53ca\u76f8\u5e94\u7684\u89c4\u5219\uff1a\u54ea\u4e2a\u5c5e\u6027\uff0c\u4f55\u65f6\u4ee5\u53ca\u4f55\u5730\u6e32\u67d3\u52a8\u753b\u3002\u7136\u540e\u4f7f\u7528\u00a0<code>animation<\/code>\u00a0\u5c5e\u6027\u628a\u52a8\u753b\u7ed1\u5b9a\u5230\u76f8\u5e94\u7684\u5143\u7d20\u4e0a\uff0c\u5e76\u4e3a\u5176\u6dfb\u52a0\u989d\u5916\u7684\u53c2\u6570\u3002<\/p>\n<h1>JavaScript \u52a8\u753b<\/h1>\n<p>JavaScript \u52a8\u753b\u53ef\u4ee5\u5904\u7406 CSS \u65e0\u6cd5\u5904\u7406\u7684\u4e8b\u60c5\u3002<\/p>\n<h2>\u4f7f\u7528 setInterval<\/h2>\n<p>\u4ece HTML\/CSS \u7684\u89d2\u5ea6\u6765\u770b\uff0c\u52a8\u753b\u662f style \u5c5e\u6027\u7684\u9010\u6e10\u53d8\u5316\u3002\u4f8b\u5982\uff0c\u5c06\u00a0<code>style.left<\/code>\u00a0\u4ece\u00a0<code>0px<\/code>\u00a0\u53d8\u5316\u5230\u00a0<code>100px<\/code>\u00a0\u53ef\u4ee5\u79fb\u52a8\u5143\u7d20\u3002<br \/>\n\u5982\u679c\u6211\u4eec\u7528\u00a0<code>setInterval<\/code>\u00a0\u6bcf\u79d2\u505a 50 \u6b21\u5c0f\u53d8\u5316\uff0c\u770b\u8d77\u6765\u4f1a\u66f4\u6d41\u7545\u3002\u7535\u5f71\u4e5f\u662f\u8fd9\u6837\u7684\u539f\u7406\uff1a\u6bcf\u79d2 24 \u5e27\u6216\u66f4\u591a\u5e27\u8db3\u4ee5\u4f7f\u5176\u770b\u8d77\u6765\u6d41\u7545\u3002<\/p>\n<h2>\u4f7f\u7528 requestAnimationFrame<\/h2>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u51e0\u4e2a\u540c\u65f6\u8fd0\u884c\u7684\u52a8\u753b\u3002<br \/>\n\u5982\u679c\u6211\u4eec\u5355\u72ec\u8fd0\u884c\u5b83\u4eec\uff0c\u6bcf\u4e2a\u90fd\u6709\u81ea\u5df1\u7684\u00a0<code>setInterval(..., 20)<\/code>\uff0c\u90a3\u4e48\u6d4f\u89c8\u5668\u5fc5\u987b\u4ee5\u6bd4\u00a0<code>20ms<\/code>\u00a0\u66f4\u9891\u7e41\u7684\u901f\u5ea6\u91cd\u7ed8\u3002<br \/>\n\u6bcf\u4e2a\u00a0<code>setInterval<\/code>\u00a0\u6bcf\u00a0<code>20ms<\/code>\u00a0\u89e6\u53d1\u4e00\u6b21\uff0c\u4f46\u5b83\u4eec\u76f8\u4e92\u72ec\u7acb\uff0c\u56e0\u6b64\u00a0<code>20ms<\/code>\u00a0\u5185\u5c06\u6709\u591a\u4e2a\u72ec\u7acb\u8fd0\u884c\u7684\u91cd\u7ed8\u3002<br \/>\n\u8fd9\u51e0\u4e2a\u72ec\u7acb\u7684\u91cd\u7ed8\u5e94\u8be5\u7ec4\u5408\u5728\u4e00\u8d77\uff0c\u4ee5\u4f7f\u6d4f\u89c8\u5668\u66f4\u52a0\u5bb9\u6613\u5904\u7406\u3002<br \/>\n\u6362\u53e5\u8bdd\u8bf4\uff0c\u50cf\u4e0b\u9762\u8fd9\u6837\uff1a<\/p>\n<pre><code class=\"language-js\">setInterval(function() {\n  animate1();\n  animate2();\n  animate3();\n}, 20)\n<\/code><\/pre>\n<p>\u2026\u2026\u6bd4\u8fd9\u6837\u66f4\u597d\uff1a<\/p>\n<pre><code class=\"language-js\">setInterval(animate1, 20);\nsetInterval(animate2, 20);\nsetInterval(animate3, 20);\n<\/code><\/pre>\n<p>\u8fd8\u6709\u4e00\u4ef6\u4e8b\u9700\u8981\u8bb0\u4f4f\u3002\u6709\u65f6\u5f53 CPU \u8fc7\u8f7d\u65f6\uff0c\u6216\u8005\u6709\u5176\u4ed6\u539f\u56e0\u9700\u8981\u964d\u4f4e\u91cd\u7ed8\u9891\u7387\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6d4f\u89c8\u5668\u9009\u9879\u5361\u88ab\u9690\u85cf\uff0c\u90a3\u4e48\u7ed8\u56fe\u5b8c\u5168\u6ca1\u6709\u610f\u4e49\u3002<br \/>\n\u6709\u4e00\u4e2a\u6807\u51c6<a href=\"http:\/\/www.w3.org\/TR\/animation-timing\/\">\u52a8\u753b\u65f6\u5e8f<\/a>\u63d0\u4f9b\u4e86\u00a0<code>requestAnimationFrame<\/code>\u00a0\u51fd\u6570\u3002<br \/>\n\u5b83\u89e3\u51b3\u4e86\u6240\u6709\u8fd9\u4e9b\u95ee\u9898\uff0c\u751a\u81f3\u66f4\u591a\u5176\u5b83\u7684\u95ee\u9898\u3002<br \/>\n\u8bed\u6cd5\uff1a<\/p>\n<pre><code class=\"language-js\">let requestId = requestAnimationFrame(callback);\n<\/code><\/pre>\n<p>\u8fd9\u4f1a\u8ba9\u00a0<code>callback<\/code>\u00a0\u51fd\u6570\u5728\u6d4f\u89c8\u5668\u6bcf\u6b21\u91cd\u7ed8\u7684\u6700\u8fd1\u65f6\u95f4\u8fd0\u884c\u3002<br \/>\n\u5982\u679c\u6211\u4eec\u5bf9\u00a0<code>callback<\/code>\u00a0\u4e2d\u7684\u5143\u7d20\u8fdb\u884c\u53d8\u5316\uff0c\u8fd9\u4e9b\u53d8\u5316\u5c06\u4e0e\u5176\u4ed6\u00a0<code>requestAnimationFrame<\/code>\u00a0\u56de\u8c03\u548c CSS \u52a8\u753b\u7ec4\u5408\u5728\u4e00\u8d77\u3002\u56e0\u6b64\uff0c\u53ea\u4f1a\u6709\u4e00\u6b21\u51e0\u4f55\u91cd\u65b0\u8ba1\u7b97\u548c\u91cd\u7ed8\uff0c\u800c\u4e0d\u662f\u591a\u6b21\u3002<br \/>\n\u8fd4\u56de\u503c\u00a0<code>requestId<\/code>\u00a0\u53ef\u7528\u6765\u53d6\u6d88\u56de\u8c03\uff1a<\/p>\n<pre><code class=\"language-js\">\/\/ \u53d6\u6d88\u56de\u8c03\u7684\u5468\u671f\u6267\u884c\ncancelAnimationFrame(requestId);\n<\/code><\/pre>\n<p><code>callback<\/code>\u00a0\u5f97\u5230\u4e00\u4e2a\u53c2\u6570 \u2014\u2014 \u4ece\u9875\u9762\u52a0\u8f7d\u5f00\u59cb\u7ecf\u8fc7\u7684\u6beb\u79d2\u6570\u3002\u8fd9\u4e2a\u65f6\u95f4\u4e5f\u53ef\u901a\u8fc7\u8c03\u7528\u00a0<a href=\"https:\/\/developer.mozilla.org\/zh\/docs\/Web\/API\/Performance\/now\">performance.now()<\/a>\u00a0\u5f97\u5230\u3002<br \/>\n\u901a\u5e38\u00a0<code>callback<\/code>\u00a0\u5f88\u5feb\u5c31\u4f1a\u8fd0\u884c\uff0c\u9664\u975e CPU \u8fc7\u8f7d\u6216\u7b14\u8bb0\u672c\u7535\u91cf\u6d88\u8017\u6b86\u5c3d\uff0c\u6216\u8005\u5176\u4ed6\u539f\u56e0\u3002<br \/>\n\u4e0b\u9762\u7684\u4ee3\u7801\u663e\u793a\u4e86\u00a0<code>requestAnimationFrame<\/code>\u00a0\u7684\u524d 10 \u6b21\u8fd0\u884c\u4e4b\u95f4\u7684\u65f6\u95f4\u95f4\u9694\u3002\u901a\u5e38\u662f 10-20ms\uff1a<\/p>\n<pre><code class=\"language-html\">&lt;script&gt;\n  let prev = performance.now();\n  let times = 0;\n\n  requestAnimationFrame(function measure(time) {\n    document.body.insertAdjacentHTML(&quot;beforeEnd&quot;, Math.floor(time - prev) + &quot; &quot;);\n    prev = time;\n\n    if (times++ &lt; 10) requestAnimationFrame(measure);\n  });\n&lt;\/script&gt;\n<\/code><\/pre>\n<h2>\u7ed3\u6784\u5316\u52a8\u753b<\/h2>\n<p>\u73b0\u5728\u6211\u4eec\u53ef\u4ee5\u5728\u00a0<code>requestAnimationFrame<\/code>\u00a0\u57fa\u7840\u4e0a\u521b\u5efa\u4e00\u4e2a\u66f4\u901a\u7528\u7684\u52a8\u753b\u51fd\u6570\uff1a<\/p>\n<pre><code class=\"language-js\">function animate({timing, draw, duration}) {\n\n  let start = performance.now();\n\n  requestAnimationFrame(function animate(time) {\n    \/\/ timeFraction \u4ece 0 \u589e\u52a0\u5230 1\n    let timeFraction = (time - start) \/ duration;\n    if (timeFraction &gt; 1) timeFraction = 1;\n\n    \/\/ \u8ba1\u7b97\u5f53\u524d\u52a8\u753b\u72b6\u6001\n    let progress = timing(timeFraction);\n\n    draw(progress); \/\/ \u7ed8\u5236\n\n    if (timeFraction &lt; 1) {\n      requestAnimationFrame(animate);\n    }\n\n  });\n}\n<\/code><\/pre>\n<p><code>animate<\/code>\u00a0\u51fd\u6570\u63a5\u53d7 3 \u4e2a\u63cf\u8ff0\u52a8\u753b\u7684\u57fa\u672c\u53c2\u6570\uff1a<br \/>\n<code>duration<\/code><br \/>\n\u52a8\u753b\u603b\u65f6\u95f4\uff0c\u6bd4\u5982\u00a0<code>1000<\/code>\u3002<br \/>\n<code>timing(timeFraction)<\/code><br \/>\n\u65f6\u5e8f\u51fd\u6570\uff0c\u7c7b\u4f3c CSS \u5c5e\u6027\u00a0<code>transition-timing-function<\/code>\uff0c\u4f20\u5165\u4e00\u4e2a\u5df2\u8fc7\u53bb\u7684\u65f6\u95f4\u4e0e\u603b\u65f6\u95f4\u4e4b\u6bd4\u7684\u5c0f\u6570\uff08<code>0<\/code>\u00a0\u4ee3\u8868\u5f00\u59cb\uff0c<code>1<\/code>\u00a0\u4ee3\u8868\u7ed3\u675f\uff09\uff0c\u8fd4\u56de\u52a8\u753b\u5b8c\u6210\u5ea6\uff08\u7c7b\u4f3c Bezier \u66f2\u7ebf\u4e2d\u7684\u00a0<code>y<\/code>\uff09\u3002<br \/>\n<code>draw(progress)<\/code><br \/>\n\u83b7\u53d6\u52a8\u753b\u5b8c\u6210\u72b6\u6001\u5e76\u7ed8\u5236\u7684\u51fd\u6570\u3002\u503c\u00a0<code>progress = 0<\/code>\u00a0\u8868\u793a\u5f00\u59cb\u52a8\u753b\u72b6\u6001\uff0c<code>progress = 1<\/code>\u00a0\u8868\u793a\u7ed3\u675f\u72b6\u6001\u3002<\/p>\n<pre><code class=\"language-js\">animate({\n  duration: 1000,\n  timing(timeFraction) {\n    return timeFraction;\n  },\n  draw(progress) {\n    elem.style.width = progress * 100 + '%';\n  }\n});\n<\/code><\/pre>\n<h2>\u65f6\u5e8f\u51fd\u6570<\/h2>\n<p>\u4e0a\u6587\u6211\u4eec\u770b\u5230\u4e86\u6700\u7b80\u5355\u7684\u7ebf\u6027\u65f6\u5e8f\u51fd\u6570\u3002<\/p>\n<h3>n \u6b21\u5e42<\/h3>\n<pre><code class=\"language-js\">function quad(timeFraction) {\n  return Math.pow(timeFraction, 2)\n}\n<\/code><\/pre>\n<p>\u589e\u5927\u5e42\u4f1a\u8ba9\u52a8\u753b\u52a0\u901f\u5f97\u66f4\u5feb\u3002<\/p>\n<h3>\u5706\u5f27<\/h3>\n<pre><code class=\"language-js\">function circ(timeFraction) {\n  return 1 - Math.sin(Math.acos(timeFraction));\n}\n<\/code><\/pre>\n<h3>\u53cd\u5f39\uff1a\u5f13\u7bad\u5c04\u51fb<\/h3>\n<p>\u4e0e\u4ee5\u524d\u7684\u51fd\u6570\u4e0d\u540c\uff0c\u5b83\u53d6\u51b3\u4e8e\u9644\u52a0\u53c2\u6570\u00a0<code>x<\/code>\uff0c\u5373\u201c\u5f39\u6027\u7cfb\u6570\u201d\u3002\u201c\u62c9\u5f13\u5f26\u201d\u7684\u8ddd\u79bb\u7531\u5b83\u5b9a\u4e49\u3002<\/p>\n<pre><code class=\"language-js\">function back(x, timeFraction) {\n  return Math.pow(timeFraction, 2) * ((x + 1) * timeFraction - x);\n}\n<\/code><\/pre>\n<h3>\u5f39\u8df3<\/h3>\n<p>\u60f3\u8c61\u4e00\u4e0b\uff0c\u6211\u4eec\u6b63\u5728\u629b\u7403\u3002\u7403\u843d\u4e0b\u4e4b\u540e\uff0c\u5f39\u8df3\u51e0\u6b21\u7136\u540e\u505c\u4e0b\u6765\u3002<\/p>\n<pre><code class=\"language-js\">function bounce(timeFraction) {\n  for (let a = 0, b = 1, result; 1; a += b, b \/= 2) {\n    if (timeFraction &gt;= (7 - 4 * a) \/ 11) {\n      return -Math.pow((11 - 6 * a - 11 * timeFraction) \/ 4, 2) + Math.pow(b, 2)\n    }\n  }\n}\n<\/code><\/pre>\n<h3>\u4f38\u7f29\u52a8\u753b<\/h3>\n<p>\u53e6\u4e00\u4e2a\u201c\u4f38\u7f29\u201d\u51fd\u6570\u63a5\u53d7\u9644\u52a0\u53c2\u6570\u00a0<code>x<\/code>\u00a0\u4f5c\u4e3a\u201c\u521d\u59cb\u8303\u56f4\u201d\u3002<\/p>\n<pre><code class=\"language-js\">function elastic(x, timeFraction) {\n  return Math.pow(2, 10 * (timeFraction - 1)) * Math.cos(20 * Math.PI * x \/ 3 * timeFraction)\n}\n<\/code><\/pre>\n<h2>\u9006\u8f6c ease*<\/h2>\n<p>\u6211\u4eec\u6709\u4e00\u7ec4\u65f6\u5e8f\u51fd\u6570\u3002\u5b83\u4eec\u7684\u76f4\u63a5\u5e94\u7528\u79f0\u4e3a\u201ceaseIn\u201d\u3002<br \/>\n\u6709\u65f6\u6211\u4eec\u9700\u8981\u4ee5\u76f8\u53cd\u7684\u987a\u5e8f\u663e\u793a\u52a8\u753b\u3002\u8fd9\u662f\u901a\u8fc7\u201ceaseOut\u201d\u53d8\u6362\u5b8c\u6210\u7684\u3002<\/p>\n<h3>easeOut<\/h3>\n<p>\u5728\u201ceaseOut\u201d\u6a21\u5f0f\u4e2d\uff0c\u6211\u4eec\u5c06\u00a0<code>timing<\/code>\u00a0\u51fd\u6570\u5c01\u88c5\u5230\u00a0<code>timingEaseOut<\/code>\u4e2d\uff1a<\/p>\n<pre><code class=\"language-js\">timingEaseOut(timeFraction) = 1 - timing(1 - timeFraction);\n<\/code><\/pre>\n<p>\u6362\u53e5\u8bdd\u8bf4\uff0c\u6211\u4eec\u6709\u4e00\u4e2a\u201c\u53d8\u6362\u201d\u51fd\u6570\u00a0<code>makeEaseOut<\/code>\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a\u201c\u5e38\u89c4\u201d\u65f6\u5e8f\u51fd\u6570\u00a0<code>timing<\/code>\u00a0\u5e76\u8fd4\u56de\u4e00\u4e2a\u5c01\u88c5\u5668\uff0c\u91cc\u9762\u5c01\u88c5\u4e86\u00a0<code>timing<\/code>\u00a0\u51fd\u6570\uff1a<\/p>\n<pre><code class=\"language-js\">\/\/ \u63a5\u53d7\u65f6\u5e8f\u51fd\u6570\uff0c\u8fd4\u56de\u53d8\u6362\u540e\u7684\u53d8\u4f53\nfunction makeEaseOut(timing) {\n  return function(timeFraction) {\n    return 1 - timing(1 - timeFraction);\n  }\n}\n<\/code><\/pre>\n<h3>easeInOut<\/h3>\n<p>\u6211\u4eec\u8fd8\u53ef\u4ee5\u5728\u52a8\u753b\u7684\u5f00\u5934\u548c\u7ed3\u5c3e\u90fd\u663e\u793a\u6548\u679c\u3002\u8be5\u53d8\u6362\u79f0\u4e3a\u201ceaseInOut\u201d\u3002<br \/>\n\u7ed9\u5b9a\u65f6\u5e8f\u51fd\u6570\uff0c\u6211\u4eec\u6309\u4e0b\u9762\u7684\u65b9\u5f0f\u8ba1\u7b97\u52a8\u753b\u72b6\u6001\uff1a<\/p>\n<pre><code class=\"language-js\">if (timeFraction &lt;= 0.5) { \/\/ \u52a8\u753b\u524d\u534a\u90e8\u5206\n  return timing(2 * timeFraction) \/ 2;\n} else { \/\/ \u52a8\u753b\u540e\u534a\u90e8\u5206\n  return (2 - timing(2 * (1 - timeFraction))) \/ 2;\n}\n<\/code><\/pre>\n<p>\u5c01\u88c5\u5668\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-js\">function makeEaseInOut(timing) {\n  return function(timeFraction) {\n    if (timeFraction &lt; .5)\n      return timing(2 * timeFraction) \/ 2;\n    else\n      return (2 - timing(2 * (1 - timeFraction))) \/ 2;\n  }\n}\n\nbounceEaseInOut = makeEaseInOut(bounce);\n<\/code><\/pre>\n<h2>\u66f4\u6709\u8da3\u7684 &quot;draw&quot;<\/h2>\n<p>\u9664\u4e86\u79fb\u52a8\u5143\u7d20\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u505a\u5176\u4ed6\u4e8b\u60c5\u3002\u6211\u4eec\u6240\u9700\u8981\u7684\u53ea\u662f\u5199\u51fa\u5408\u9002\u7684\u00a0<code>draw<\/code>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8d1d\u585e\u5c14\u66f2\u7ebf \u8d1d\u585e\u5c14\u66f2\u7ebf\u7528\u4e8e\u8ba1\u7b97\u673a\u56fe\u5f62\u7ed8\u5236\u5f62\u72b6\uff0cCSS \u52a8\u753b\u548c\u8bb8\u591a\u5176\u4ed6\u5730\u65b9\u3002 \u63a7\u5236\u70b9 \u8d1d\u585e\u5c14\u66f2\u7ebf\u7531\u63a7\u5236\u70b9\u5b9a\u4e49\u3002  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"class_list":["post-748","post","type-post","status-publish","format-standard","hentry","category-front-end"],"_links":{"self":[{"href":"https:\/\/levin.ink\/index.php?rest_route=\/wp\/v2\/posts\/748","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/levin.ink\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/levin.ink\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/levin.ink\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/levin.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=748"}],"version-history":[{"count":1,"href":"https:\/\/levin.ink\/index.php?rest_route=\/wp\/v2\/posts\/748\/revisions"}],"predecessor-version":[{"id":749,"href":"https:\/\/levin.ink\/index.php?rest_route=\/wp\/v2\/posts\/748\/revisions\/749"}],"wp:attachment":[{"href":"https:\/\/levin.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=748"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/levin.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=748"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/levin.ink\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=748"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}