{"id":1374,"date":"2025-02-06T23:39:32","date_gmt":"2025-02-06T15:39:32","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=1374"},"modified":"2025-02-06T23:39:33","modified_gmt":"2025-02-06T15:39:33","slug":"css-%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e6%95%99%e7%a8%8b%ef%bc%9a%e6%8f%90%e9%ab%98%e7%bd%91%e9%a1%b5%e5%8a%a0%e8%bd%bd%e9%80%9f%e5%ba%a6%e4%b8%8e%e5%93%8d%e5%ba%94%e8%83%bd%e5%8a%9b","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/02\/06\/css-%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e6%95%99%e7%a8%8b%ef%bc%9a%e6%8f%90%e9%ab%98%e7%bd%91%e9%a1%b5%e5%8a%a0%e8%bd%bd%e9%80%9f%e5%ba%a6%e4%b8%8e%e5%93%8d%e5%ba%94%e8%83%bd%e5%8a%9b\/","title":{"rendered":"CSS \u6027\u80fd\u4f18\u5316\u6559\u7a0b\uff1a\u63d0\u9ad8\u7f51\u9875\u52a0\u8f7d\u901f\u5ea6\u4e0e\u54cd\u5e94\u80fd\u529b"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728\u524d\u7aef\u5f00\u53d1\u4e2d\uff0cCSS \u6027\u80fd\u4f18\u5316\u81f3\u5173\u91cd\u8981\u3002\u4f18\u79c0\u7684\u6027\u80fd\u4f18\u5316\u4e0d\u4ec5\u80fd\u63d0\u5347\u7f51\u9875\u7684\u52a0\u8f7d\u901f\u5ea6\uff0c\u8fd8\u80fd\u63d0\u9ad8\u7528\u6237\u4f53\u9a8c\u548c\u5f00\u53d1\u6548\u7387\u3002\u5728\u8fd9\u4e2a\u90e8\u5206\uff0c\u6211\u4eec\u5c06\u6df1\u5165\u63a2\u8ba8\u4e00\u4e9b\u5e38\u89c1\u7684 CSS \u6027\u80fd\u4f18\u5316\u6280\u5de7\uff0c\u5305\u62ec <strong>\u9009\u62e9\u5668\u6027\u80fd\u4f18\u5316<\/strong>\u3001<strong>\u51cf\u5c11\u91cd\u6392\u548c\u91cd\u7ed8<\/strong>\u3001<strong>\u538b\u7f29\u4e0e\u5408\u5e76 CSS \u6587\u4ef6<\/strong> \u7b49\u65b9\u9762\u7684\u6280\u5de7\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u9009\u62e9\u5668\u7684\u6027\u80fd<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u9009\u62e9\u5668\u662f\u5f71\u54cd\u6d4f\u89c8\u5668\u6e32\u67d3\u6548\u7387\u7684\u4e00\u4e2a\u91cd\u8981\u56e0\u7d20\u3002\u8fc7\u4e8e\u590d\u6742\u7684\u9009\u62e9\u5668\u4f1a\u589e\u52a0\u6d4f\u89c8\u5668\u89e3\u6790\u548c\u5339\u914d DOM \u5143\u7d20\u7684\u65f6\u95f4\uff0c\u4ece\u800c\u964d\u4f4e\u6027\u80fd\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">1.1 \u907f\u514d\u8fc7\u4e8e\u590d\u6742\u7684\u9009\u62e9\u5668<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528\u9ad8\u6548\u7684\u9009\u62e9\u5668\u662f\u6027\u80fd\u4f18\u5316\u7684\u5173\u952e\u3002\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u540e\u4ee3\u9009\u62e9\u5668\uff08\u5982 <code>div p<\/code>\uff09\u6216\u901a\u914d\u7b26\uff08\u5982 <code>*<\/code>\uff09\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u9009\u62e9\u5668\u9700\u8981\u904d\u5386 DOM \u4e2d\u5927\u91cf\u7684\u5143\u7d20\u3002<\/li>\n\n\n\n<li>\u4f18\u5148\u4f7f\u7528\u7c7b\u9009\u62e9\u5668\uff08\u5982 <code>.class<\/code>\uff09\u548c ID \u9009\u62e9\u5668\uff08\u5982 <code>#id<\/code>\uff09\uff0c\u5b83\u4eec\u7684\u67e5\u627e\u901f\u5ea6\u8f83\u5feb\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4e0d\u63a8\u8350\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/* \u8fc7\u4e8e\u590d\u6742\u7684\u9009\u62e9\u5668 *\/\ndiv ul li a:hover {\n  color: red;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u63a8\u8350\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/* \u66f4\u7b80\u5355\u4e14\u6027\u80fd\u66f4\u9ad8\u7684\u9009\u62e9\u5668 *\/\n.button:hover {\n  color: red;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u7b80\u5316\u9009\u62e9\u5668\uff0c\u6d4f\u89c8\u5668\u80fd\u66f4\u5feb\u901f\u5730\u627e\u5230\u9700\u8981\u5e94\u7528\u6837\u5f0f\u7684\u5143\u7d20\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u5229\u7528\u6d4f\u89c8\u5668\u7684\u6e32\u67d3\u4f18\u5316<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u73b0\u4ee3\u6d4f\u89c8\u5668\u652f\u6301\u5f88\u591a\u4f18\u5316\u6280\u5de7\uff0c\u53ef\u4ee5\u5e2e\u52a9\u52a0\u901f\u9875\u9762\u6e32\u67d3\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">2.1 \u51cf\u5c11\u91cd\u6392\u4e0e\u91cd\u7ed8<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u91cd\u6392\uff08Reflow\uff09<\/strong> \u548c <strong>\u91cd\u7ed8\uff08Repaint\uff09<\/strong> \u662f\u6d4f\u89c8\u5668\u5728\u5904\u7406\u6837\u5f0f\u65f6\u7ecf\u5e38\u53d1\u751f\u7684\u64cd\u4f5c\u3002\u6bcf\u5f53\u5143\u7d20\u7684\u5e03\u5c40\u3001\u5927\u5c0f\u6216\u4f4d\u7f6e\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u6d4f\u89c8\u5668\u9700\u8981\u91cd\u65b0\u8ba1\u7b97\u5e76\u7ed8\u5236\u5143\u7d20\uff0c\u8fd9\u53ef\u80fd\u5bfc\u81f4\u9875\u9762\u6027\u80fd\u4e0b\u964d\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u91cd\u6392<\/strong>\uff1a\u5f53\u6539\u53d8\u5143\u7d20\u7684\u5927\u5c0f\u3001\u4f4d\u7f6e\u3001\u8fb9\u8ddd\u7b49\u65f6\uff0c\u6d4f\u89c8\u5668\u4f1a\u91cd\u65b0\u8ba1\u7b97\u8be5\u5143\u7d20\u53ca\u5176\u7236\u5143\u7d20\u7684\u5e03\u5c40\u3002<\/li>\n\n\n\n<li><strong>\u91cd\u7ed8<\/strong>\uff1a\u5f53\u6539\u53d8\u5143\u7d20\u7684\u6837\u5f0f\uff08\u4f8b\u5982\u989c\u8272\u3001\u80cc\u666f\uff09\u65f6\uff0c\u6d4f\u89c8\u5668\u4f1a\u91cd\u65b0\u7ed8\u5236\u8be5\u5143\u7d20\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u907f\u514d\u9891\u7e41\u7684\u91cd\u6392\u548c\u91cd\u7ed8\u5bf9\u4e8e\u6027\u80fd\u4f18\u5316\u81f3\u5173\u91cd\u8981\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">2.2 \u4f7f\u7528 <code>will-change<\/code> \u5c5e\u6027<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><code>will-change<\/code> \u5c5e\u6027\u5141\u8bb8\u4f60\u544a\u8bc9\u6d4f\u89c8\u5668\u54ea\u4e9b\u5c5e\u6027\u5373\u5c06\u53d1\u751f\u53d8\u5316\uff0c\u4ece\u800c\u8ba9\u6d4f\u89c8\u5668\u63d0\u524d\u4e3a\u8fd9\u4e9b\u53d8\u5316\u505a\u597d\u51c6\u5907\uff0c\u4f18\u5316\u6e32\u67d3\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.element {\n  will-change: transform, opacity; \/* \u63d0\u524d\u544a\u8bc9\u6d4f\u89c8\u5668\u5143\u7d20\u5c06\u4f1a\u6539\u53d8 transform \u548c opacity \u5c5e\u6027 *\/\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c3d\u7ba1 <code>will-change<\/code> \u53ef\u4ee5\u63d0\u5347\u6027\u80fd\uff0c\u4f46\u5b83\u4e5f\u53ef\u80fd\u589e\u52a0\u5185\u5b58\u6d88\u8017\uff0c\u56e0\u6b64\u5e94\u8c28\u614e\u4f7f\u7528\uff0c\u53ea\u5728\u5fc5\u8981\u65f6\u4f7f\u7528\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">2.3 \u5408\u5e76\u6837\u5f0f<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c3d\u91cf\u5c06\u591a\u4e2a\u76f8\u540c\u7684\u6837\u5f0f\u89c4\u5219\u5408\u5e76\u6210\u4e00\u4e2a\u89c4\u5219\uff0c\u4ee5\u51cf\u5c11\u6d4f\u89c8\u5668\u7684\u8ba1\u7b97\u91cf\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/* \u4e0d\u63a8\u8350 *\/\n.element1 {\n  color: red;\n  font-size: 16px;\n}\n\n.element2 {\n  color: red;\n  font-size: 16px;\n}\n\n\/* \u63a8\u8350 *\/\n.element1, .element2 {\n  color: red;\n  font-size: 16px;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u5408\u5e76\u76f8\u540c\u7684\u6837\u5f0f\uff0c\u51cf\u5c11\u6837\u5f0f\u8868\u4e2d\u7684\u5197\u4f59\u5185\u5bb9\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. \u51cf\u5c11\u52a8\u753b\u7684\u5f71\u54cd<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u52a8\u753b\u548c\u8fc7\u6e21\u6548\u679c\u867d\u7136\u80fd\u63d0\u5347\u7528\u6237\u4f53\u9a8c\uff0c\u4f46\u8fc7\u591a\u7684\u52a8\u753b\u4e5f\u4f1a\u5bf9\u6027\u80fd\u4ea7\u751f\u8d1f\u9762\u5f71\u54cd\u3002\u4e3a\u4e86\u4f18\u5316\u52a8\u753b\u6027\u80fd\uff0c\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u51e0\u79cd\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">3.1 \u4f7f\u7528 <code>transform<\/code> \u548c <code>opacity<\/code> \u5c5e\u6027\u8fdb\u884c\u52a8\u753b<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><code>transform<\/code> \u548c <code>opacity<\/code> \u662f\u4e24\u79cd\u6027\u80fd\u8f83\u9ad8\u7684 CSS \u5c5e\u6027\uff0c\u56e0\u4e3a\u5b83\u4eec\u4e0d\u4f1a\u5f15\u8d77\u91cd\u6392\uff0c\u6d4f\u89c8\u5668\u53ef\u4ee5\u901a\u8fc7 GPU \u52a0\u901f\u5904\u7406\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/* \u9ad8\u6027\u80fd\u52a8\u753b *\/\n.element {\n  transition: transform 0.3s ease, opacity 0.3s ease;\n}\n\n.element:hover {\n  transform: scale(1.1);\n  opacity: 0.8;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0e\u6539\u53d8 <code>width<\/code>\u3001<code>height<\/code>\u3001<code>top<\/code> \u7b49\u5c5e\u6027\u76f8\u6bd4\uff0c<code>transform<\/code> \u548c <code>opacity<\/code> \u80fd\u66f4\u597d\u5730\u5229\u7528\u6d4f\u89c8\u5668\u7684\u786c\u4ef6\u52a0\u901f\uff0c\u63d0\u9ad8\u52a8\u753b\u7684\u6d41\u7545\u5ea6\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">3.2 \u4f7f\u7528 <code>requestAnimationFrame<\/code>\uff08JavaScript\uff09<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4f60\u5728 CSS \u4e2d\u65e0\u6cd5\u5b8c\u6210\u67d0\u4e9b\u590d\u6742\u7684\u52a8\u753b\u6548\u679c\uff0c\u53ef\u4ee5\u4f7f\u7528 JavaScript \u4e2d\u7684 <code>requestAnimationFrame<\/code> \u6765\u5b9e\u73b0\u66f4\u9ad8\u6548\u7684\u52a8\u753b\u3002\u5b83\u80fd\u4fdd\u8bc1\u52a8\u753b\u6bcf\u4e00\u5e27\u7684\u6e32\u67d3\u662f\u5728\u6d4f\u89c8\u5668\u7684\u4e0b\u4e00\u6b21\u91cd\u7ed8\u5468\u671f\u5185\u8fdb\u884c\uff0c\u4ece\u800c\u4f18\u5316\u52a8\u753b\u7684\u6d41\u7545\u5ea6\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">4. \u538b\u7f29\u4e0e\u5408\u5e76 CSS \u6587\u4ef6<\/h4>\n\n\n\n<h5 class=\"wp-block-heading\">4.1 \u4f7f\u7528\u5de5\u5177\u538b\u7f29 CSS \u6587\u4ef6<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">CSS \u6587\u4ef6\u5728\u4f20\u8f93\u65f6\u7684\u5927\u5c0f\u76f4\u63a5\u5f71\u54cd\u9875\u9762\u52a0\u8f7d\u65f6\u95f4\u3002\u901a\u8fc7 <strong>\u538b\u7f29<\/strong> CSS \u6587\u4ef6\uff0c\u53ef\u4ee5\u51cf\u5c11\u6587\u4ef6\u7684\u4f53\u79ef\uff0c\u63d0\u9ad8\u9875\u9762\u52a0\u8f7d\u901f\u5ea6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5e38\u7528\u7684 CSS \u538b\u7f29\u5de5\u5177\u6709\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>CSSNano<\/strong>\uff1a\u4e00\u4e2a\u6d41\u884c\u7684 CSS \u538b\u7f29\u5de5\u5177\uff0c\u5b83\u80fd\u591f\u5c06 CSS \u6587\u4ef6\u538b\u7f29\u5230\u6700\u5c0f\u3002<\/li>\n\n\n\n<li><strong>PostCSS<\/strong>\uff1a\u4e00\u79cd CSS \u5904\u7406\u5de5\u5177\uff0c\u652f\u6301\u591a\u79cd\u63d2\u4ef6\uff0c\u5176\u4e2d\u5305\u62ec\u538b\u7f29 CSS \u529f\u80fd\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528 CSSNano \u538b\u7f29\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>npx cssnano input.css output.min.css<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u538b\u7f29\u540e\u7684 CSS \u6587\u4ef6\u4f1a\u53bb\u9664\u4e0d\u5fc5\u8981\u7684\u7a7a\u683c\u3001\u6ce8\u91ca\u7b49\u5185\u5bb9\uff0c\u4ece\u800c\u51cf\u5c0f\u6587\u4ef6\u7684\u5927\u5c0f\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">4.2 \u5408\u5e76 CSS \u6587\u4ef6<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c06\u591a\u4e2a CSS \u6587\u4ef6\u5408\u5e76\u4e3a\u4e00\u4e2a\u6587\u4ef6\u53ef\u4ee5\u51cf\u5c11 HTTP \u8bf7\u6c42\u7684\u6570\u91cf\uff0c\u4ece\u800c\u63d0\u9ad8\u7f51\u9875\u7684\u52a0\u8f7d\u901f\u5ea6\u3002\u901a\u5e38\uff0c\u53ef\u4ee5\u4f7f\u7528\u6784\u5efa\u5de5\u5177\uff08\u5982 Webpack\u3001Gulp\u3001Grunt \u7b49\uff09\u6765\u81ea\u52a8\u5408\u5e76\u6587\u4ef6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4e0d\u63a8\u8350\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;link rel=\"stylesheet\" href=\"style1.css\"&gt;\n&lt;link rel=\"stylesheet\" href=\"style2.css\"&gt;\n&lt;link rel=\"stylesheet\" href=\"style3.css\"&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u63a8\u8350\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;link rel=\"stylesheet\" href=\"styles.min.css\"&gt; &lt;!-- \u5408\u5e76\u540e\u7684\u6587\u4ef6 --&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u51cf\u5c11\u6587\u4ef6\u8bf7\u6c42\uff0c\u6d4f\u89c8\u5668\u53ef\u4ee5\u66f4\u5feb\u5730\u52a0\u8f7d\u9875\u9762\uff0c\u4ece\u800c\u63d0\u9ad8\u7f51\u9875\u6027\u80fd\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">5. \u4f7f\u7528\u5916\u90e8 CSS \u6587\u4ef6<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c3d\u91cf\u4f7f\u7528\u5916\u90e8 CSS \u6587\u4ef6\uff0c\u800c\u4e0d\u662f\u5c06 CSS \u76f4\u63a5\u5d4c\u5165 HTML \u6587\u4ef6\u4e2d\u3002\u5916\u90e8 CSS \u6587\u4ef6\u80fd\u591f\u88ab\u6d4f\u89c8\u5668\u7f13\u5b58\uff0c\u4ece\u800c\u52a0\u901f\u540e\u7eed\u9875\u9762\u7684\u52a0\u8f7d\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;link rel=\"stylesheet\" href=\"styles.css\"&gt;<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">6. \u907f\u514d\u4f7f\u7528 CSS \u8868\u8fbe\u5f0f<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">CSS 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