{"id":95998,"date":"2026-08-27T09:24:34","date_gmt":"2026-08-27T01:24:34","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/95998.html"},"modified":"2026-08-27T09:24:34","modified_gmt":"2026-08-27T01:24:34","slug":"webgl-%e4%b8%8e%e8%a7%86%e9%a2%91%e8%83%8c%e6%99%af-%e9%a6%96%e5%b1%8f%e8%a7%86%e8%a7%89%e5%b1%82%e7%9a%84%e6%80%a7%e8%83%bd%e5%8d%9a%e5%bc%88","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/95998.html","title":{"rendered":"WebGL \u4e0e\u89c6\u9891\u80cc\u666f\u2014\u2014\u9996\u5c4f\u89c6\u89c9\u5c42\u7684\u6027\u80fd\u535a\u5f08"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\n<ul>\n<li>\u6bcf\u65e5\u4e00\u53e5\u6b63\u80fd\u91cf<\/li>\n<li>\u524d\u8a00<\/li>\n<li>\u4e00\u3001\u9996\u5c4f\u89c6\u89c9\u5c42\u7684\u68c0\u6d4b&#xff1a;WebGL \u662f\u5426\u5b58\u5728&#xff1f;<\/li>\n<li>\u4e8c\u3001Shader \u5b9e\u73b0\u62c6\u89e3&#xff1a;\u54c1\u724c\u8272\u6d41\u52a8\u5149\u6655<\/li>\n<li>\n<ul>\n<li>\u6838\u5fc3 GLSL \u7740\u8272\u5668<\/li>\n<\/ul>\n<\/li>\n<li>\u4e09\u3001&#096;requestAnimationFrame&#096; \u7684\u8282\u6d41\u4e0e\u751f\u547d\u5468\u671f\u7ba1\u7406<\/li>\n<li>\n<ul>\n<li>\u667a\u80fd\u8282\u6d41\u7b56\u7565<\/li>\n<\/ul>\n<\/li>\n<li>\u56db\u3001\u89c6\u9891\u80cc\u666f\u4e0e WebGL \u7684\u6743\u8861\u51b3\u7b56<\/li>\n<li>\u4e94\u3001&#096;IntersectionObserver&#096; \u5ef6\u8fdf\u521d\u59cb\u5316&#xff1a;\u9996\u5c4f\u963b\u585e\u7684\u9632\u7ebf<\/li>\n<li>\n<ul>\n<li>\u5ef6\u8fdf\u521d\u59cb\u5316\u7b56\u7565<\/li>\n<\/ul>\n<\/li>\n<li>\u7ed3\u8bed<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260827012433-6a8f91d121f27.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>\u6bcf\u65e5\u4e00\u53e5\u6b63\u80fd\u91cf<\/h3>\n<p>\u5728\u7269\u8d28\u4e16\u754c\u505a\u51cf\u6cd5&#xff0c;\u5728\u7cbe\u795e\u5bb6\u56ed\u505a\u52a0\u6cd5\u3002 \u6446\u8131\u5bf9\u7269\u54c1\u3001\u6d6e\u534e\u548c\u8fc7\u5ea6\u6d88\u8d39\u7684\u6267\u7740&#xff0c;\u8ffd\u6c42\u7b80\u7ea6\u3001\u6e05\u723d\u4e0e\u81ea\u7531&#xff0c;\u907f\u514d\u88ab\u7269\u6240\u5f79\u3002\u4e0d\u65ad\u4e30\u5bcc\u77e5\u8bc6\u3001\u667a\u6167\u3001\u60c5\u611f\u3001\u4f53\u9a8c\u4e0e\u521b\u9020\u529b&#xff0c;\u8ba9\u5185\u5fc3\u4e16\u754c\u65e5\u76ca\u5e7f\u9614\u3001\u6df1\u9083\u548c\u575a\u97e7\u3002\u8eab\u5916\u4e4b\u7269\u8d8a\u7b80&#xff0c;\u5fc3\u5185\u5b87\u5b99\u8d8a\u4e30\u3002<\/p>\n<h3>\u524d\u8a00<\/h3>\n<p>\u9996\u5c4f&#xff08;Above the Fold&#xff09;\u662f\u7528\u6237\u8fdb\u5165\u7f51\u7ad9\u540e\u7684\u7b2c\u4e00\u89c6\u89c9\u89e6\u70b9&#xff0c;\u4e5f\u662f\u54c1\u724c\u5370\u8c61\u7684&#034;\u96f6\u79d2\u51b3\u7b56\u533a&#034;\u3002\u5728 2026 \u5e74\u7684\u524d\u7aef\u5de5\u7a0b\u5b9e\u8df5\u4e2d&#xff0c;\u9996\u5c4f\u89c6\u89c9\u5c42\u7684\u9009\u62e9\u5df2\u7ecf\u6f14\u53d8\u4e3a\u4e00\u573a\u7cbe\u786e\u7684\u6027\u80fd\u535a\u5f08&#xff1a;WebGL \u7684 GPU \u5e76\u884c\u6e32\u67d3\u80fd\u529b\u53ef\u4ee5\u521b\u9020\u6d41\u4f53\u5149\u6655\u3001\u7c92\u5b50\u573a\u7b49\u6c89\u6d78\u5f0f\u6548\u679c&#xff0c;\u4f46\u5176\u4e0a\u4e0b\u6587\u521d\u59cb\u5316\u6210\u672c\u548c\u6301\u7eed\u5e27\u6e32\u67d3\u5f00\u9500\u4e0d\u5bb9\u5ffd\u89c6&#xff1b;\u89c6\u9891\u80cc\u666f&#xff08;MP4\/WebM&#xff09;\u5219\u80fd\u4ee5\u8f83\u4f4e\u7684\u5f00\u53d1\u6210\u672c\u63d0\u4f9b\u52a8\u6001\u53d9\u4e8b\u611f&#xff0c;\u4f46\u89c6\u9891\u89e3\u7801\u5bf9 CPU \u7684\u62a2\u5360\u53ef\u80fd\u76f4\u63a5\u62d6\u57ae LCP&#xff08;Largest Contentful Paint&#xff09;\u3002\u672c\u6587\u5c06\u4ee5 Codex \u5b98\u7f51\u7684\u9996\u5c4f\u6280\u672f\u7b56\u7565\u4e3a\u5207\u5165\u70b9&#xff0c;\u62c6\u89e3\u89c6\u89c9\u5c42\u80cc\u540e\u7684\u5de5\u7a0b\u6743\u8861\u4e0e\u4f18\u5316\u8def\u5f84\u3002<\/p>\n<hr \/>\n<h3>\u4e00\u3001\u9996\u5c4f\u89c6\u89c9\u5c42\u7684\u68c0\u6d4b&#xff1a;WebGL \u662f\u5426\u5b58\u5728&#xff1f;<\/h3>\n<p>\u5728\u5206\u6790\u4efb\u4f55\u7f51\u7ad9\u7684\u9996\u5c4f\u6027\u80fd\u4e4b\u524d&#xff0c;\u9996\u8981\u4efb\u52a1\u662f\u786e\u8ba4\u5176\u89c6\u89c9\u5c42\u7684\u771f\u5b9e\u6280\u672f\u6784\u6210\u3002\u5bf9\u4e8e Codex \u5b98\u7f51\u8fd9\u7c7b\u9ad8\u6d41\u91cf\u4ea7\u54c1\u9875\u9762&#xff0c;\u901a\u8fc7 Chrome DevTools \u8fdb\u884c\u4e09\u5c42\u9a8c\u8bc1&#xff1a;<\/p>\n<p>\u7b2c\u4e00\u5c42&#xff1a;\u5143\u7d20\u9762\u677f\u68c0\u6d4b \u6253\u5f00 Elements \u9762\u677f&#xff0c;\u641c\u7d22 &lt;canvas&gt; \u6807\u7b7e\u3002\u82e5\u9996\u5c4f\u5b58\u5728\u5168\u5c4f Canvas \u5143\u7d20&#xff0c;\u4e14\u5176 width\/height \u5c5e\u6027\u5339\u914d\u89c6\u53e3\u5206\u8fa8\u7387&#xff08;\u6216\u903b\u8f91\u50cf\u7d20\u6bd4\u7f29\u653e\u503c&#xff09;&#xff0c;\u5219\u9ad8\u5ea6\u7591\u4f3c WebGL \u80cc\u666f\u3002<\/p>\n<p>\u7b2c\u4e8c\u5c42&#xff1a;GPU \u9762\u677f\u9a8c\u8bc1 \u5728 Chrome \u7684 chrome:\/\/gpu \u9875\u9762\u4e2d&#xff0c;\u67e5\u770b \u201cGraphics Feature Status\u201d \u4e0b\u7684 WebGL \u548c WebGL2 \u72b6\u6001\u3002\u968f\u540e\u5728 Performance \u9762\u677f\u5f55\u5236\u9996\u5c4f\u52a0\u8f7d\u8fc7\u7a0b&#xff0c;\u89c2\u5bdf\u662f\u5426\u5b58\u5728\u6301\u7eed\u7684 \u201cGPU\u201d \u6d3b\u52a8\u6761\u3002\u82e5 GPU \u5360\u7528\u5728\u9996\u5c4f\u52a0\u8f7d\u540e\u4ecd\u4fdd\u6301 5%-15% \u7684\u57fa\u7ebf\u6ce2\u52a8&#xff0c;\u8bf4\u660e\u5b58\u5728\u6d3b\u8dc3\u7684\u7740\u8272\u5668\u6e32\u67d3\u5faa\u73af\u3002<\/p>\n<p>\u7b2c\u4e09\u5c42&#xff1a;JavaScript \u65ad\u70b9\u8ffd\u8e2a \u5728 Sources \u9762\u677f\u4e2d\u641c\u7d22 THREE.WebGLRenderer \u6216 gl &#061; canvas.getContext(&#039;webgl2&#039;) \u7684\u521d\u59cb\u5316\u4ee3\u7801\u3002Codex \u4f5c\u4e3a OpenAI \u7684\u6838\u5fc3\u4ea7\u54c1\u9875\u9762&#xff0c;\u5176\u524d\u7aef\u67b6\u6784\u9075\u5faa\u5b98\u65b9\u8bbe\u8ba1\u6307\u5357\u4e2d\u5f3a\u8c03\u7684&#034;restrained composition&#034;&#xff08;\u514b\u5236\u6784\u56fe&#xff09;\u539f\u5219&#xff0c;\u503e\u5411\u4e8e\u4f7f\u7528&#034;one dominant visual&#034;\u800c\u975e\u8fc7\u5ea6\u88c5\u9970\u3002\u56e0\u6b64&#xff0c;\u82e5\u5176\u9996\u5c4f\u91c7\u7528 WebGL&#xff0c;\u66f4\u53ef\u80fd\u662f\u57fa\u4e8e Simplex Noise \u7684\u6781\u7b80\u6d41\u52a8\u5149\u6655&#xff0c;\u800c\u975e\u590d\u6742\u7684 3D \u573a\u666f\u3002<\/p>\n<hr \/>\n<h3>\u4e8c\u3001Shader \u5b9e\u73b0\u62c6\u89e3&#xff1a;\u54c1\u724c\u8272\u6d41\u52a8\u5149\u6655<\/h3>\n<p>\u5047\u8bbe Codex \u9996\u5c4f\u91c7\u7528\u4e86 WebGL \u80cc\u666f&#xff0c;\u5176\u6280\u672f\u5b9e\u73b0\u5927\u6982\u7387\u9075\u5faa\u4ee5\u4e0b\u67b6\u6784\u2014\u2014\u57fa\u4e8e\u5168\u5c4f\u56db\u8fb9\u5f62&#xff08;Full-screen Quad&#xff09;\u7684\u7247\u6bb5\u7740\u8272\u5668&#xff08;Fragment Shader&#xff09;&#xff0c;\u4ee5 Simplex Noise \u9a71\u52a8\u54c1\u724c\u8272\u7684\u6d41\u52a8\u6548\u679c&#xff1a;<\/p>\n<h4>\u6838\u5fc3 GLSL \u7740\u8272\u5668<\/h4>\n<p>\/\/ Vertex Shader<br \/>\nattribute vec2 position;<br \/>\nvoid main() {<br \/>\n  gl_Position &#061; vec4(position, 0.0, 1.0);<br \/>\n}<\/p>\n<p>\/\/ Fragment Shader<br \/>\nprecision highp float;<br \/>\nuniform float u_time;<br \/>\nuniform vec2 u_resolution;<br \/>\nuniform vec3 u_brandColor; \/\/ Codex \u54c1\u724c\u4e3b\u8272<\/p>\n<p>\/\/ Simplex Noise 3D \u51fd\u6570&#xff08;\u7b80\u5316\u7248&#xff09;<br \/>\nvec3 mod289(vec3 x) { return x &#8211; floor(x * (1.0 \/ 289.0)) * 289.0; }<br \/>\nvec2 mod289(vec2 x) { return x &#8211; floor(x * (1.0 \/ 289.0)) * 289.0; }<br \/>\nvec3 permute(vec3 x) { return mod289(((x*34.0)&#043;1.0)*x); }<\/p>\n<p>float snoise(vec2 v) {<br \/>\n  const vec4 C &#061; vec4(0.211324865405187, 0.366025403784439,<br \/>\n             -0.577350269189626, 0.024390243902439);<br \/>\n  vec2 i  &#061; floor(v &#043; dot(v, C.yy));<br \/>\n  vec2 x0 &#061; v &#8211;   i &#043; dot(i, C.xx);<br \/>\n  vec2 i1;<br \/>\n  i1 &#061; (x0.x &gt; x0.y) ? vec2(1.0, 0.0) : vec2(0.0, 1.0);<br \/>\n  vec4 x12 &#061; x0.xyxy &#043; C.xxzz;<br \/>\n  x12.xy -&#061; i1;<br \/>\n  i &#061; mod289(i);<br \/>\n  vec3 p &#061; permute(permute(i.y &#043; vec3(0.0, i1.y, 1.0))<br \/>\n    &#043; i.x &#043; vec3(0.0, i1.x, 1.0));<br \/>\n  vec3 m &#061; max(0.5 &#8211; vec3(dot(x0,x0), dot(x12.xy,x12.xy),<br \/>\n    dot(x12.zw,x12.zw)), 0.0);<br \/>\n  m &#061; m*m;<br \/>\n  m &#061; m*m;<br \/>\n  vec3 x &#061; 2.0 * fract(p * C.www) &#8211; 1.0;<br \/>\n  vec3 h &#061; abs(x) &#8211; 0.5;<br \/>\n  vec3 ox &#061; floor(x &#043; 0.5);<br \/>\n  vec3 a0 &#061; x &#8211; ox;<br \/>\n  m *&#061; 1.79284291400159 &#8211; 0.85373472095314 * (a0*a0 &#043; h*h);<br \/>\n  vec3 g;<br \/>\n  g.x  &#061; a0.x  * x0.x  &#043; h.x  * x0.y;<br \/>\n  g.yz &#061; a0.yz * x12.xz &#043; h.yz * x12.yw;<br \/>\n  return 130.0 * dot(m, g);<br \/>\n}<\/p>\n<p>void main() {<br \/>\n  vec2 uv &#061; gl_FragCoord.xy \/ u_resolution.xy;<br \/>\n  float aspect &#061; u_resolution.x \/ u_resolution.y;<br \/>\n  uv.x *&#061; aspect;<\/p>\n<p>  \/\/ \u591a\u5c42\u566a\u58f0\u53e0\u52a0&#xff0c;\u521b\u9020\u6d41\u52a8\u611f<br \/>\n  float noise1 &#061; snoise(uv * 2.0 &#043; u_time * 0.05);<br \/>\n  float noise2 &#061; snoise(uv * 4.0 &#8211; u_time * 0.03) * 0.5;<br \/>\n  float noise3 &#061; snoise(uv * 1.0 &#043; u_time * 0.02) * 0.25;<br \/>\n  float finalNoise &#061; noise1 &#043; noise2 &#043; noise3;<\/p>\n<p>  \/\/ \u54c1\u724c\u8272\u5149\u6655&#xff1a;\u4e3b\u8272 &#043; \u566a\u58f0\u9a71\u52a8\u7684\u660e\u6697\u53d8\u5316<br \/>\n  vec3 color &#061; u_brandColor * (0.85 &#043; finalNoise * 0.15);<\/p>\n<p>  \/\/ \u8fb9\u7f18\u6697\u89d2&#xff0c;\u805a\u7126\u4e2d\u5fc3\u5185\u5bb9<br \/>\n  float vignette &#061; 1.0 &#8211; length((gl_FragCoord.xy \/ u_resolution.xy &#8211; 0.5) * 1.2);<br \/>\n  color *&#061; smoothstep(0.0, 1.0, vignette);<\/p>\n<p>  gl_FragColor &#061; vec4(color, 1.0);<br \/>\n}<\/p>\n<p>\u6280\u672f\u8981\u70b9\u89e3\u6790&#xff1a;<\/p>\n<ul>\n<li>Simplex Noise \u66ff\u4ee3 Perlin Noise&#xff1a;\u8ba1\u7b97\u590d\u6742\u5ea6\u4ece O(2^n) \u964d\u81f3 O(n)&#xff0c;\u5728\u79fb\u52a8 GPU \u4e0a\u5e27\u7387\u63d0\u5347\u7ea6 30%\u3002<\/li>\n<li>\u4e09\u5c42\u566a\u58f0\u53e0\u52a0&#xff1a;\u4e0d\u540c\u9891\u7387&#xff08;2.0\u30014.0\u30011.0&#xff09;\u548c\u65f6\u95f4\u504f\u79fb\u7684\u566a\u58f0\u53e0\u52a0&#xff0c;\u907f\u514d\u5355\u4e00\u9891\u7387\u7684\u673a\u68b0\u611f&#xff0c;\u521b\u9020\u6709\u673a\u6d41\u52a8\u6548\u679c\u3002<\/li>\n<li>\u54c1\u724c\u8272\u6ce8\u5165&#xff1a;\u901a\u8fc7 u_brandColor uniform \u53d8\u91cf\u5c06\u52a8\u6001\u566a\u58f0\u6620\u5c04\u5230\u54c1\u724c\u8272\u57df&#xff0c;\u786e\u4fdd\u89c6\u89c9\u5c42\u4e0e\u54c1\u724c\u8bc6\u522b\u7cfb\u7edf\u4e00\u81f4&#xff0c;\u800c\u975e\u4f7f\u7528\u786c\u7f16\u7801\u8272\u503c\u3002<\/li>\n<li>\u8fb9\u7f18\u6697\u89d2&#xff08;Vignette&#xff09;&#xff1a;\u901a\u8fc7 smoothstep \u5728\u89c6\u53e3\u8fb9\u7f18\u5236\u9020\u81ea\u7136\u6697\u89d2&#xff0c;\u5c06\u89c6\u89c9\u7126\u70b9\u5f15\u5411\u4e2d\u5fc3\u7684\u6587\u6848\u5185\u5bb9&#xff0c;\u7b26\u5408 OpenAI \u524d\u7aef\u8bbe\u8ba1\u6307\u5357\u4e2d&#034;brand first, headline second&#034;\u7684\u5c42\u7ea7\u539f\u5219\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e09\u3001requestAnimationFrame \u7684\u8282\u6d41\u4e0e\u751f\u547d\u5468\u671f\u7ba1\u7406<\/h3>\n<p>WebGL \u80cc\u666f\u6700\u5927\u7684\u6027\u80fd\u9677\u9631\u4e0d\u662f\u521d\u59cb\u52a0\u8f7d&#xff0c;\u800c\u662f\u6301\u7eed\u6e32\u67d3\u5e26\u6765\u7684\u65e0\u8c13\u80fd\u8017\u3002\u5f53\u7528\u6237\u5207\u6362\u5230\u5176\u4ed6\u6807\u7b7e\u9875\u6216\u5c06\u7a97\u53e3\u6700\u5c0f\u5316\u65f6&#xff0c;\u540e\u53f0\u7684 requestAnimationFrame \u5faa\u73af\u4ecd\u5728\u6d88\u8017 GPU \u8d44\u6e90\u3002<\/p>\n<h4>\u667a\u80fd\u8282\u6d41\u7b56\u7565<\/h4>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">WebGLBackground<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token function\">constructor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">canvas<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>canvas <span class=\"token operator\">&#061;<\/span> canvas<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>gl <span class=\"token operator\">&#061;<\/span> canvas<span class=\"token punctuation\">.<\/span><span class=\"token function\">getContext<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;webgl2&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n      <span class=\"token literal-property property\">alpha<\/span><span class=\"token operator\">:<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span><br \/>\n      <span class=\"token literal-property property\">antialias<\/span><span class=\"token operator\">:<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span><br \/>\n      <span class=\"token literal-property property\">powerPreference<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#039;low-power&#039;<\/span> <span class=\"token comment\">\/\/ \u4f18\u5148\u4f7f\u7528\u96c6\u6210 GPU&#xff0c;\u8282\u7701\u80fd\u8017<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>isVisible <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>rafId <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u76d1\u542c\u9875\u9762\u53ef\u89c1\u6027\u53d8\u5316<\/span><br \/>\n    document<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;visibilitychange&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n      <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>document<span class=\"token punctuation\">.<\/span>hidden<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">pause<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n      <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">resume<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n      <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u76d1\u542c\u5143\u7d20\u662f\u5426\u8fdb\u5165\u89c6\u53e3<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>observer <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">IntersectionObserver<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">entries<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n      entries<span class=\"token punctuation\">.<\/span><span class=\"token function\">forEach<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">entry<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>isVisible <span class=\"token operator\">&#061;<\/span> entry<span class=\"token punctuation\">.<\/span>isIntersecting<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>isVisible <span class=\"token operator\">?<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">resume<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">:<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">pause<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n      <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">threshold<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">0<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>observer<span class=\"token punctuation\">.<\/span><span class=\"token function\">observe<\/span><span class=\"token punctuation\">(<\/span>canvas<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><\/p>\n<p>  <span class=\"token function\">render<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>isVisible <span class=\"token operator\">||<\/span> document<span class=\"token punctuation\">.<\/span>hidden<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u66f4\u65b0 uniform \u5e76\u7ed8\u5236<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">updateUniforms<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>gl<span class=\"token punctuation\">.<\/span><span class=\"token function\">drawArrays<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>gl<span class=\"token punctuation\">.<\/span><span class=\"token constant\">TRIANGLES<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">6<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>rafId <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">requestAnimationFrame<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">render<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><\/p>\n<p>  <span class=\"token function\">pause<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>rafId<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n      <span class=\"token function\">cancelAnimationFrame<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>rafId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n      <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>rafId <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><\/p>\n<p>  <span class=\"token function\">resume<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>rafId <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>isVisible <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token operator\">!<\/span>document<span class=\"token punctuation\">.<\/span>hidden<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n      <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">render<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><\/p>\n<p>  <span class=\"token function\">destroy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">pause<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>observer<span class=\"token punctuation\">.<\/span><span class=\"token function\">disconnect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u663e\u5f0f\u91ca\u653e WebGL \u4e0a\u4e0b\u6587<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> ext <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>gl<span class=\"token punctuation\">.<\/span><span class=\"token function\">getExtension<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;WEBGL_lose_context&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ext<span class=\"token punctuation\">)<\/span> ext<span class=\"token punctuation\">.<\/span><span class=\"token function\">loseContext<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5173\u952e\u4f18\u5316\u70b9&#xff1a;<\/p>\n<ul>\n<li>powerPreference: &#039;low-power&#039;&#xff1a;\u5728\u53cc GPU \u8bbe\u5907&#xff08;\u5982 MacBook Pro&#xff09;\u4e0a\u5f3a\u5236\u4f7f\u7528\u96c6\u6210 GPU \u6e32\u67d3\u80cc\u666f&#xff0c;\u5c06\u72ec\u7acb GPU \u7559\u7ed9\u4e3b\u5e94\u7528\u5185\u5bb9\u3002\u5bf9\u4e8e\u7b80\u5355\u7684\u566a\u58f0\u7740\u8272\u5668&#xff0c;\u96c6\u6210 GPU \u5b8c\u5168\u8db3\u591f&#xff0c;\u4e14\u80fd\u663e\u8457\u964d\u4f4e\u53d1\u70ed\u548c\u529f\u8017\u3002<\/li>\n<li>visibilitychange \u4e8b\u4ef6&#xff1a;\u9875\u9762\u9690\u85cf\u65f6\u7acb\u5373\u6682\u505c\u6e32\u67d3\u5faa\u73af&#xff0c;\u8fd9\u662f\u79fb\u52a8\u7aef\u8282\u7701\u7535\u91cf\u7684\u5173\u952e\u3002<\/li>\n<li>IntersectionObserver&#xff1a;\u5f53\u7528\u6237\u5411\u4e0b\u6eda\u52a8&#xff0c;WebGL Canvas \u79bb\u5f00\u89c6\u53e3\u65f6\u81ea\u52a8\u6682\u505c&#xff0c;\u8fd4\u56de\u65f6\u6062\u590d\u3002\u8fd9\u907f\u514d\u4e86\u9996\u5c4f\u80cc\u666f\u5728\u9875\u9762\u751f\u547d\u5468\u671f\u540e\u534a\u6bb5\u7684\u65e0\u6548\u6e32\u67d3\u3002<\/li>\n<li>WEBGL_lose_context&#xff1a;\u7ec4\u4ef6\u5378\u8f7d\u65f6\u4e3b\u52a8\u91ca\u653e\u4e0a\u4e0b\u6587&#xff0c;\u9632\u6b62\u5355\u9875\u5e94\u7528&#xff08;SPA&#xff09;\u8def\u7531\u5207\u6362\u540e\u7684 WebGL \u4e0a\u4e0b\u6587\u6cc4\u6f0f\u2014\u2014\u8fd9\u662f\u957f\u671f\u8fd0\u884c\u9875\u9762\u4e2d GPU \u5185\u5b58\u788e\u7247\u5316\u7684\u4e3b\u8981\u6839\u6e90\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u56db\u3001\u89c6\u9891\u80cc\u666f\u4e0e WebGL \u7684\u6743\u8861\u51b3\u7b56<\/h3>\n<p>\u5e76\u975e\u6240\u6709\u52a8\u6001\u80cc\u666f\u90fd\u9002\u5408 WebGL\u3002\u5728 Codex \u5b98\u7f51\u7684\u8bed\u5883\u4e0b&#xff0c;\u89c6\u9891\u80cc\u666f&#xff08;MP4\/WebM&#xff09;\u4e0e WebGL \u7684\u6289\u62e9\u5e94\u57fa\u4e8e\u4ee5\u4e0b\u7ef4\u5ea6&#xff1a;<\/p>\n<table>\n<tr>\u7ef4\u5ea6WebGL (Simplex Noise)\u89c6\u9891\u80cc\u666f (MP4\/WebM)<\/tr>\n<tbody>\n<tr>\n<td>\u521d\u59cb\u52a0\u8f7d<\/td>\n<td>\u9700\u4e0b\u8f7d JS &#043; Shader \u4ee3\u7801&#xff08;&lt; 50KB&#xff09;&#xff0c;\u4e0a\u4e0b\u6587\u521d\u59cb\u5316\u7ea6 50-100ms<\/td>\n<td>\u9700\u4e0b\u8f7d\u89c6\u9891\u6587\u4ef6&#xff08;\u901a\u5e38 2-10MB&#xff09;&#xff0c;\u9996\u5e27\u89e3\u7801\u5ef6\u8fdf<\/td>\n<\/tr>\n<tr>\n<td>\u8fd0\u884c\u65f6\u5f00\u9500<\/td>\n<td>GPU \u7740\u8272\u5668\u8ba1\u7b97&#xff08;5-15% GPU \u5360\u7528&#xff09;&#xff0c;\u51e0\u4e4e\u96f6 CPU \u89e3\u7801\u8d1f\u62c5<\/td>\n<td>\u89c6\u9891\u89e3\u7801\u6301\u7eed\u5360\u7528 CPU&#xff08;\u8f6f\u89e3&#xff09;\u6216 GPU&#xff08;\u786c\u89e3&#xff09;&#xff0c;\u5185\u5b58\u5360\u7528\u9ad8<\/td>\n<\/tr>\n<tr>\n<td>\u89c6\u89c9\u7075\u6d3b\u6027<\/td>\n<td>\u65e0\u9650&#xff1a;\u5b9e\u65f6\u54cd\u5e94\u9f20\u6807\u3001\u6eda\u52a8\u3001\u65f6\u95f4<\/td>\n<td>\u6709\u9650&#xff1a;\u9884\u6e32\u67d3\u5185\u5bb9&#xff0c;\u4ea4\u4e92\u9700\u989d\u5916 JS \u63a7\u5236<\/td>\n<\/tr>\n<tr>\n<td>\u6587\u4ef6\u4f53\u79ef<\/td>\n<td>\u6781\u5c0f&#xff08;\u4ee3\u7801\u9a71\u52a8&#xff09;<\/td>\n<td>\u5927&#xff0c;\u5373\u4f7f\u538b\u7f29\u540e\u4ecd\u53ef\u80fd\u8d85\u8fc7\u6027\u80fd\u9884\u7b97<\/td>\n<\/tr>\n<tr>\n<td>\u7535\u6c60\u6d88\u8017<\/td>\n<td>\u4e2d\u7b49&#xff08;GPU \u6301\u7eed\u5de5\u4f5c&#xff09;<\/td>\n<td>\u9ad8&#xff08;\u89c6\u9891\u89e3\u7801 &#043; \u6e32\u67d3\u53cc\u5f00\u9500&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u65e0\u969c\u788d<\/td>\n<td>\u9700\u914d\u5408 prefers-reduced-motion \u5173\u95ed<\/td>\n<td>\u9700\u5904\u7406\u81ea\u52a8\u64ad\u653e\u7b56\u7565\u3001\u5b57\u5e55\u3001\u66ff\u4ee3\u6587\u672c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Codex \u7684\u51b3\u7b56\u903b\u8f91&#xff1a;<\/p>\n<p>\u82e5\u9996\u5c4f\u9700\u8981&#034;\u54c1\u724c\u6c1b\u56f4\u611f&#034;\u800c\u975e&#034;\u53d9\u4e8b\u89c6\u9891\u5185\u5bb9&#034;&#xff0c;WebGL \u662f\u66f4\u4f18\u89e3\u3002\u5176\u7406\u7531\u5728\u4e8e&#xff1a;<\/p>\n<li>\u4f53\u79ef\u9884\u7b97&#xff1a;Codex \u4f5c\u4e3a\u5f00\u53d1\u8005\u5de5\u5177\u4ea7\u54c1&#xff0c;\u9996\u5c4f\u6027\u80fd\u9884\u7b97\u6781\u4e3a\u7d27\u5f20\u3002\u4e00\u4e2a 5MB \u7684\u89c6\u9891\u6587\u4ef6\u53ef\u80fd\u76f4\u63a5\u8017\u5c3d 3G \u7f51\u7edc\u4e0b\u7684\u6027\u80fd\u9884\u7b97&#xff0c;\u800c WebGL Shader \u4ee3\u7801\u7ecf\u8fc7 gzip \u538b\u7f29\u540e\u901a\u5e38\u4e0d\u8db3 10KB\u3002<\/li>\n<li>\u89e3\u7801\u7ade\u4e89&#xff1a;\u89c6\u9891\u89e3\u7801\u7ebf\u7a0b\u4e0e\u4e3b\u7ebf\u7a0b\u7684 LCP \u56fe\u7247\u89e3\u7801\u5b58\u5728\u8d44\u6e90\u7ade\u4e89\u3002\u5728\u4f4e\u7aef\u8bbe\u5907\u4e0a&#xff0c;\u89c6\u9891\u9996\u5e27\u89e3\u7801\u53ef\u80fd\u5bfc\u81f4 LCP \u5ef6\u8fdf 200-500ms\u3002<\/li>\n<li>\u54c1\u724c\u4e00\u81f4\u6027&#xff1a;\u89c6\u9891\u80cc\u666f\u7684\u8272\u8c03\u548c\u52a8\u6001\u96be\u4ee5\u4e0e\u54c1\u724c\u8272\u7cbe\u786e\u5339\u914d&#xff0c;\u800c WebGL \u7740\u8272\u5668\u53ef\u4ee5\u901a\u8fc7 uniform \u53d8\u91cf\u5b9e\u65f6\u540c\u6b65\u8bbe\u8ba1\u7cfb\u7edf\u7684 Token \u53d8\u66f4\u3002<\/li>\n<p>\u89c6\u9891\u80cc\u666f\u7684\u9002\u7528\u573a\u666f&#xff1a;\u4ec5\u5f53\u9996\u5c4f\u9700\u8981\u5c55\u793a\u771f\u5b9e\u4ea7\u54c1\u754c\u9762\u5f55\u5c4f&#xff08;\u5982 Codex CLI \u7684\u64cd\u4f5c\u6f14\u793a&#xff09;\u6216\u54c1\u724c\u53d9\u4e8b\u77ed\u7247\u65f6&#xff0c;\u624d\u5e94\u9009\u62e9\u89c6\u9891\u3002\u6b64\u65f6\u5e94\u9075\u5faa\u4ee5\u4e0b\u4f18\u5316&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528 &lt;video muted loop playsinline preload&#061;&#034;none&#034;&gt;&#xff0c;\u907f\u514d\u81ea\u52a8\u4e0b\u8f7d\u3002<\/li>\n<li>\u63d0\u4f9b poster \u5c5e\u6027\u4f5c\u4e3a\u9996\u5e27\u5360\u4f4d&#xff0c;\u786e\u4fdd LCP \u4e0d\u53d7\u89c6\u9891\u52a0\u8f7d\u963b\u585e\u3002<\/li>\n<li>\u4f7f\u7528 IntersectionObserver \u5ef6\u8fdf\u52a0\u8f7d\u89c6\u9891\u6e90&#xff0c;\u4ec5\u5728\u9996\u5c4f\u53ef\u89c1\u65f6\u5f00\u59cb\u4e0b\u8f7d\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e94\u3001IntersectionObserver \u5ef6\u8fdf\u521d\u59cb\u5316&#xff1a;\u9996\u5c4f\u963b\u585e\u7684\u9632\u7ebf<\/h3>\n<p>WebGL \u4e0a\u4e0b\u6587\u521d\u59cb\u5316\u6d89\u53ca GPU \u9a71\u52a8\u7684\u72b6\u6001\u673a\u6784\u5efa\u3001\u7740\u8272\u5668\u7f16\u8bd1\u548c\u94fe\u63a5\u3001\u7eb9\u7406\u5185\u5b58\u5206\u914d\u7b49\u64cd\u4f5c&#xff0c;\u5728\u4e3b\u7ebf\u7a0b\u4e0a\u53ef\u80fd\u6d88\u8017 50-200ms\u3002\u82e5\u8fd9\u6bb5\u903b\u8f91\u4e0e\u5173\u952e CSS\u3001\u5b57\u4f53\u52a0\u8f7d\u3001LCP \u56fe\u7247\u5e76\u884c\u6267\u884c&#xff0c;\u5c06\u76f4\u63a5\u963b\u585e\u9996\u6b21\u7ed8\u5236\u3002<\/p>\n<h4>\u5ef6\u8fdf\u521d\u59cb\u5316\u7b56\u7565<\/h4>\n<p><span class=\"token comment\">\/\/ \u4e0d\u5728 DOMContentLoaded \u65f6\u7acb\u5373\u521d\u59cb\u5316<\/span><br \/>\n<span class=\"token comment\">\/\/ \u800c\u662f\u7b49\u5f85\u9996\u5c4f\u5173\u952e\u5185\u5bb9\u6e32\u67d3\u5b8c\u6210\u540e&#xff0c;\u518d\u542f\u52a8 WebGL<\/span><\/p>\n<p><span class=\"token keyword\">const<\/span> heroCanvas <span class=\"token operator\">&#061;<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;hero-webgl&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u65b9\u6848\u4e00&#xff1a;\u57fa\u4e8e requestIdleCallback \u7684\u95f2\u65f6\u521d\u59cb\u5316<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;requestIdleCallback&#039;<\/span> <span class=\"token keyword\">in<\/span> window<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token function\">requestIdleCallback<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">initWebGLBackground<\/span><span class=\"token punctuation\">(<\/span>heroCanvas<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">timeout<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">2000<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6700\u957f\u7b49\u5f85 2 \u79d2<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token comment\">\/\/ \u964d\u7ea7&#xff1a;\u4f7f\u7528 setTimeout \u5ef6\u8fdf\u5230\u5173\u952e\u6e32\u67d3\u540e<\/span><br \/>\n  <span class=\"token function\">setTimeout<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token function\">initWebGLBackground<\/span><span class=\"token punctuation\">(<\/span>heroCanvas<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u65b9\u6848\u4e8c&#xff1a;\u4e0e LCP \u5143\u7d20\u52a0\u8f7d\u8054\u52a8<\/span><br \/>\n<span class=\"token keyword\">new<\/span> <span class=\"token class-name\">PerformanceObserver<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">list<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token keyword\">const<\/span> entries <span class=\"token operator\">&#061;<\/span> list<span class=\"token punctuation\">.<\/span><span class=\"token function\">getEntries<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token keyword\">const<\/span> lcpEntry <span class=\"token operator\">&#061;<\/span> entries<span class=\"token punctuation\">[<\/span>entries<span class=\"token punctuation\">.<\/span>length <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <span class=\"token comment\">\/\/ LCP \u5b8c\u6210\u540e 100ms \u518d\u521d\u59cb\u5316 WebGL&#xff0c;\u907f\u514d\u6e32\u67d3\u7ade\u4e89<\/span><br \/>\n  <span class=\"token function\">setTimeout<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token function\">initWebGLBackground<\/span><span class=\"token punctuation\">(<\/span>heroCanvas<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">observe<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">entryTypes<\/span><span class=\"token operator\">:<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;largest-contentful-paint&#039;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5de5\u7a0b\u539f\u5219&#xff1a;<\/p>\n<ul>\n<li>\u7edd\u4e0d\u4e0e\u5173\u952e\u8d44\u6e90\u5e76\u884c&#xff1a;WebGL \u521d\u59cb\u5316\u5e94\u6392\u5728 LCP \u5143\u7d20\u3001\u9996\u5c4f\u5b57\u4f53\u3001\u5173\u952e CSS \u4e4b\u540e\u3002\u4f7f\u7528 requestIdleCallback \u6216 PerformanceObserver \u786e\u4fdd\u5176\u5728\u6d4f\u89c8\u5668&#034;\u7a7a\u95f2\u65f6\u6bb5&#034;\u6267\u884c\u3002<\/li>\n<li>\u6e10\u8fdb\u589e\u5f3a&#xff1a;\u82e5 WebGL \u521d\u59cb\u5316\u5931\u8d25&#xff08;\u5982 GPU \u9ed1\u540d\u5355\u3001\u4e0a\u4e0b\u6587\u4e22\u5931&#xff09;&#xff0c;\u5e94\u4f18\u96c5\u964d\u7ea7\u4e3a\u9759\u6001 CSS \u6e10\u53d8\u80cc\u666f&#xff0c;\u786e\u4fdd\u9996\u5c4f\u5185\u5bb9\u59cb\u7ec8\u53ef\u8bbf\u95ee\u3002<\/li>\n<li>\u51cf\u5c11\u8fd0\u52a8\u504f\u597d&#xff1a;\u5c0a\u91cd prefers-reduced-motion \u5a92\u4f53\u67e5\u8be2&#xff0c;\u4e3a\u654f\u611f\u7528\u6237\u5173\u95ed\u52a8\u6001\u80cc\u666f&#xff0c;\u76f4\u63a5\u5c55\u793a\u9759\u6001\u54c1\u724c\u8272\u3002<\/li>\n<\/ul>\n<p><span class=\"token atrule\"><span class=\"token rule\">&#064;media<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token property\">prefers-reduced-motion<\/span><span class=\"token punctuation\">:<\/span> reduce<span class=\"token punctuation\">)<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token selector\">#hero-webgl<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token property\">display<\/span><span class=\"token punctuation\">:<\/span> none<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n  <span class=\"token selector\">.hero-fallback<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token property\">background<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token function\">linear-gradient<\/span><span class=\"token punctuation\">(<\/span>135deg<span class=\"token punctuation\">,<\/span> <span class=\"token function\">var<\/span><span class=\"token punctuation\">(<\/span>&#8211;brand-primary<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">var<\/span><span class=\"token punctuation\">(<\/span>&#8211;brand-secondary<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<hr \/>\n<h3>\u7ed3\u8bed<\/h3>\n<p>\u9996\u5c4f\u89c6\u89c9\u5c42\u7684\u6027\u80fd\u535a\u5f08&#xff0c;\u672c\u8d28\u4e0a\u662f&#034;\u611f\u5b98\u51b2\u51fb\u529b&#034;\u4e0e&#034;\u6280\u672f\u514b\u5236&#034;\u4e4b\u95f4\u7684\u5e73\u8861\u3002Codex \u5b98\u7f51\u82e5\u9009\u62e9 WebGL \u4f5c\u4e3a\u9996\u5c4f\u80cc\u666f&#xff0c;\u5176\u4ef7\u503c\u4e0d\u5728\u4e8e\u6280\u672f\u7684\u70ab\u793a&#xff0c;\u800c\u5728\u4e8e\u901a\u8fc7\u6781\u7b80\u7684 Simplex Noise \u7740\u8272\u5668\u3001\u4e25\u683c\u7684\u6e32\u67d3\u751f\u547d\u5468\u671f\u7ba1\u7406\u548c\u7cbe\u51c6\u7684\u5ef6\u8fdf\u521d\u59cb\u5316\u7b56\u7565&#xff0c;\u5728\u51e0\u4e4e\u96f6\u611f\u77e5\u6210\u672c\u7684\u524d\u63d0\u4e0b\u63d0\u5347\u54c1\u724c\u6c1b\u56f4\u3002\u76f8\u6bd4\u4e4b\u4e0b&#xff0c;\u89c6\u9891\u80cc\u666f\u867d\u7136\u5f00\u53d1\u95e8\u69db\u4f4e&#xff0c;\u4f46\u5176\u4f53\u79ef\u5f00\u9500\u548c\u6301\u7eed\u89e3\u7801\u6210\u672c\u4f7f\u5176\u4ec5\u9002\u7528\u4e8e\u5f3a\u53d9\u4e8b\u573a\u666f\u3002\u6700\u7ec8&#xff0c;\u65e0\u8bba\u9009\u62e9\u4f55\u79cd\u6280\u672f\u8def\u5f84&#xff0c;\u6838\u5fc3\u539f\u5219\u59cb\u7ec8\u4e0d\u53d8&#xff1a;\u9996\u5c4f\u7684\u6bcf\u4e00\u6beb\u79d2\u548c\u6bcf\u4e00\u5b57\u8282&#xff0c;\u90fd\u5fc5\u987b\u4e3a\u7528\u6237\u7684\u9996\u6b21\u8ba4\u77e5\u670d\u52a1&#xff0c;\u800c\u975e\u4e3a\u6280\u672f\u7684\u5b58\u5728\u8bc1\u660e\u3002<\/p>\n<hr 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