{"id":1397,"date":"2021-11-02T16:43:26","date_gmt":"2021-11-02T08:43:26","guid":{"rendered":"https:\/\/aif.amtbbs.org\/?p=1397"},"modified":"2021-11-02T16:43:26","modified_gmt":"2021-11-02T08:43:26","slug":"%e5%a6%82%e4%bd%95%e7%bc%96%e5%86%99%e5%b1%9e%e4%ba%8e%e8%87%aa%e5%b7%b1%e7%9a%84postcss-8%e6%8f%92%e4%bb%b6%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/aif.amtbbs.org\/index.php\/2021\/11\/02\/1397\/","title":{"rendered":"\u5982\u4f55\u7f16\u5199\u5c5e\u4e8e\u81ea\u5df1\u7684PostCSS 8\u63d2\u4ef6\uff1f"},"content":{"rendered":"
\"\u56fe\u7247\"<\/section>\n
\u4f5c\u8005 | \u674e\u4f73\u6d69<\/section>\n

\u7b14\u8005\u8fd1\u671f\u5728\u5c06\u524d\u7aef\u67b6\u6784 webpack \u5347\u7ea7\u5230 5 \u65f6\uff0c\u4e00\u4e9b\u914d\u5957\u6a21\u5757\u4e5f\u9700\u8981\u8fdb\u884c\u5347\u7ea7\uff0c\u5176\u4e2d\u5305\u62ec\u4e86 css \u5904\u7406\u6a21\u5757 PostCSS\u3002\u65e7\u7248\u672c\u4f7f\u7528\u7684\u662f PostCSS 7\uff0c\u5728\u5347\u7ea7\u81f3 PostCSS 8 \u7684\u8fc7\u7a0b\u4e2d\uff0c\u7b14\u8005\u53d1\u73b0\u90e8\u5206\u63d2\u4ef6\u524d\u7f6e\u4f9d\u8d56\u8fd8\u662f\u505c\u7559\u5728 7 \u7248\u672c\uff0c\u4e14\u5e74\u4e45\u5931\u4fee\uff0c\u5728 PostCSS 8 \u4e2d\u51fa\u73b0\u5404\u79cd\u5404\u6837\u7684\u95ee\u9898\uff0c\u65e0\u5948\u53ea\u80fd\u7814\u7a76\u6e90\u7801\uff0c\u5c06\u76ee\u524d\u90e8\u5206\u65e7\u7248\u672c\u63d2\u4ef6\u5347\u7ea7\u81f3\u65b0\u7248\u672c\u3002\u8fd9\u91cc\uff0c\u7b14\u8005\u5c06\u5347\u7ea7\u63d2\u4ef6\u7684\u8fc7\u7a0b\u8fdb\u884c\u7b80\u5316\u548c\u63d0\u70bc\uff0c\u8ba9\u8bfb\u8005\u81ea\u5df1\u4e5f\u53ef\u4ee5\u7f16\u5199\u4e00\u4e2a PostCSS 8 \u63d2\u4ef6\u3002<\/p>\n

\u63d2\u4ef6\u5de5\u4f5c\u539f\u7406<\/section>\n

PostCSS \u662f\u4e00\u4e2a\u5141\u8bb8\u4f7f\u7528 JS \u63d2\u4ef6\u8f6c\u6362\u6837\u5f0f\u7684\u5de5\u5177\u3002\u5f00\u53d1\u8005\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u5b9e\u9645\u9700\u6c42\uff0c\u5728\u7f16\u8bd1\u8fc7\u7a0b\u5c06\u6307\u5b9a css \u6837\u5f0f\u8fdb\u884c\u8f6c\u6362\u548c\u5904\u7406\u3002\u76ee\u524d PostCSS \u5b98\u65b9\u6536\u5f55\u63d2\u4ef6\u6709 200 \u591a\u6b3e\uff0c\u5176\u4e2d\u5305\u62ec\u4f7f\u7528\u6700\u5e7f\u6cdb\u7684Autoprefixer<\/code>\u81ea\u52a8\u8865\u5168 css \u524d\u7f00\u63d2\u4ef6\u3002<\/p>\n

PostCSS \u548c\u63d2\u4ef6\u7684\u5de5\u4f5c\u539f\u7406\u5176\u5b9e\u5f88\u7b80\u5355\uff0c\u5c31\u662f\u5148\u5c06 css \u6e90\u7801\u8f6c\u6362\u4e3a AST\uff0c\u63d2\u4ef6\u57fa\u4e8e\u8f6c\u6362\u540e AST \u7684\u4fe1\u606f\u8fdb\u884c\u4e2a\u6027\u5316\u5904\u7406\uff0c\u6700\u540e PostCSS \u518d\u5c06\u5904\u7406\u540e\u7684 AST \u4fe1\u606f\u8f6c\u6362\u4e3a css \u6e90\u7801\uff0c\u5b8c\u6210 css \u6837\u5f0f\u8f6c\u6362\uff0c\u5176\u6d41\u7a0b\u53ef\u4ee5\u5f52\u7ed3\u4e3a\u4e0b\u56fe\uff1a<\/p>\n

\"\u56fe\u7247\"<\/p>\n

\u4e0b\u9762\u6211\u4eec\u901a\u8fc7\u5b9e\u9645\u4f8b\u5b50\u770b\u770b PostCSS \u4f1a\u5c06 css \u6e90\u7801\u8f6c\u6362\u6210\u7684 AST \u683c\u5f0f\uff1a<\/p>\n

const postcss = require('postcss')\r\npostcss().process(`\r\n.demo {\r\n  font-size: 14px; \/*this is a comment*\/\r\n}\r\n`).then(result => {\r\n  console.log(result)\r\n})\r\n<\/code><\/pre>\n
\u4ee3\u7801\u4e2d\u76f4\u63a5\u5f15\u7528 PostCSS\uff0c\u5728\u4e0d\u7ecf\u8fc7\u4efb\u4f55\u63d2\u4ef6\u7684\u60c5\u51b5\u4e0b\u5c06 css \u6e90\u7801\u8fdb\u884c\u8f6c\u6362\uff0cAST \u8f6c\u6362\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{\r\n  \"processor\": {\r\n    \"version\": \"8.3.6\",\r\n    \"plugins\": []\r\n  },\r\n  \"messages\": [],\r\n  \"root\": {\r\n    \"raws\": {\r\n      \"semicolon\": false,\r\n      \"after\": \"\\n\"\r\n    },\r\n    \"type\": \"root\",\r\n    \/\/ \u2193 nodes \u5b57\u6bb5\u5185\u5bb9\u91cd\u70b9\u5173\u6ce8\r\n    \"nodes\": [\r\n      {\r\n        \"raws\": {\r\n          \"before\": \"\\n\",\r\n          \"between\": \" \",\r\n          \"semicolon\": true,\r\n          \"after\": \"\\n\"\r\n        },\r\n        \"type\": \"rule\",\r\n        \"nodes\": [\r\n          {\r\n            \"raws\": {\r\n              \"before\": \"\\n  \",\r\n              \"between\": \": \"\r\n            },\r\n            \"type\": \"decl\",\r\n            \"source\": {\r\n              \"inputId\": 0,\r\n              \"start\": {\r\n                \"offset\": 11,\r\n                \"line\": 3,\r\n                \"column\": 3\r\n              },\r\n              \"end\": {\r\n                \"offset\": 26,\r\n                \"line\": 3,\r\n                \"column\": 18\r\n              }\r\n            },\r\n            \"prop\": \"font-size\", \/\/ css \u5c5e\u6027\u548c\u503c\r\n            \"value\": \"14px\"\r\n          },\r\n          {\r\n            \"raws\": {\r\n              \"before\": \" \",\r\n              \"left\": \"\",\r\n              \"right\": \"\"\r\n            },\r\n            \"type\": \"comment\", \/\/ \u6ce8\u91ca\u7c7b\r\n            \"source\": {\r\n              \"inputId\": 0,\r\n              \"start\": {\r\n                \"offset\": 28,\r\n                \"line\": 3,\r\n                \"column\": 20\r\n              },\r\n              \"end\": {\r\n                \"offset\": 48,\r\n                \"line\": 3,\r\n                \"column\": 40\r\n              }\r\n            },\r\n            \"text\": \"this is a comment\"\r\n          }\r\n        ],\r\n        \"source\": {\r\n          \"inputId\": 0,\r\n          \"start\": {\r\n            \"offset\": 1,\r\n            \"line\": 2,\r\n            \"column\": 1\r\n          },\r\n          \"end\": {\r\n            \"offset\": 28,\r\n            \"line\": 4,\r\n            \"column\": 1\r\n          }\r\n        },\r\n        \"selector\": \".demo\", \/\/ \u7c7b\u540d\r\n        \"lastEach\": 1,\r\n        \"indexes\": {}\r\n      }\r\n    ],\r\n    \"source\": {\r\n      \"inputId\": 0,\r\n      \"start\": {\r\n        \"offset\": 0,\r\n        \"line\": 1,\r\n        \"column\": 1\r\n      }\r\n    },\r\n    \"lastEach\": 1,\r\n    \"indexes\": {},\r\n    \"inputs\": [\r\n      {\r\n        \"hasBOM\": false,\r\n        \"css\": \"\\n.demo {\\n  font-size: 14px;\\n}\\n\",\r\n        \"id\": \"<input css vi1Oew>\"\r\n      }\r\n    ]\r\n  },\r\n  \"opts\": {},\r\n  \"css\": \"\\n.demo {\\n  font-size: 14px;\\n}\\n\"\r\n}\r\n<\/code><\/pre>\n
AST \u5bf9\u8c61\u4e2d nodes \u5b57\u6bb5\u91cc\u7684\u5185\u5bb9\u5c24\u4e3a\u91cd\u8981\uff0c\u5176\u4e2d\u5b58\u50a8\u4e86 css \u6e90\u7801\u7684\u5173\u952e\u5b57\u3001\u6ce8\u91ca\u3001\u6e90\u7801\u7684\u8d77\u59cb\u3001\u7ed3\u675f\u4f4d\u7f6e\u4ee5\u53ca css \u7684\u5c5e\u6027\u548c\u5c5e\u6027\u503c\uff0c\u7c7b\u540d\u4f7f\u7528selector<\/code>\u5b58\u50a8\uff0c\u6bcf\u4e2a\u7c7b\u4e0b\u53c8\u5b58\u50a8\u4e00\u4e2a nodes \u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u4e0b\u5b58\u653e\u7684\u5c31\u662f\u8be5\u7c7b\u7684\u5c5e\u6027 (prop<\/code>) \u548c\u5c5e\u6027\u503c (value<\/code>)\u3002\u90a3\u4e48\u63d2\u4ef6\u5c31\u53ef\u4ee5\u57fa\u4e8e AST \u5b57\u6bb5\u5bf9 css \u5c5e\u6027\u8fdb\u884c\u4fee\u6539\uff0c\u4ece\u800c\u5b9e\u73b0 css \u7684\u8f6c\u6362\u3002<\/p>\n
PostCSS \u63d2\u4ef6\u683c\u5f0f\u89c4\u8303\u53ca API<\/section>\n
PostCSS \u63d2\u4ef6\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a JS \u5bf9\u8c61\uff0c\u5176\u57fa\u672c\u5f62\u5f0f\u548c\u89e3\u6790\u5982\u4e0b\uff1a<\/p>\n
module.exports = (opts = { }) => {\r\n  \/\/ \u6b64\u5904\u53ef\u5bf9\u63d2\u4ef6\u914d\u7f6e opts \u8fdb\u884c\u5904\u7406\r\n  return {\r\n    postcssPlugin: 'postcss-test', \/\/ \u63d2\u4ef6\u540d\u5b57\uff0c\u4ee5 postcss- \u5f00\u5934\r\n\r\n    Once (root, postcss) {\r\n      \/\/ \u6b64\u5904 root \u5373\u4e3a\u8f6c\u6362\u540e\u7684 AST\uff0c\u6b64\u65b9\u6cd5\u8f6c\u6362\u4e00\u6b21 css \u5c06\u8c03\u7528\u4e00\u6b21\r\n    },\r\n\r\n    Declaration (decl, postcss) {\r\n      \/\/ postcss \u904d\u5386 css \u6837\u5f0f\u65f6\u8c03\u7528\uff0c\u5728\u8fd9\u91cc\u53ef\u4ee5\u5feb\u901f\u83b7\u5f97 type \u4e3a decl \u7684\u8282\u70b9 (\u8bf7\u53c2\u8003\u7b2c\u4e8c\u8282\u7684 AST \u5bf9\u8c61)\r\n    },\r\n\r\n    Declaration: {\r\n      color(decl, postcss) {\r\n        \/\/ \u53ef\u4ee5\u8fdb\u4e00\u6b65\u83b7\u5f97 decl \u8282\u70b9\u6307\u5b9a\u7684\u5c5e\u6027\u503c\uff0c\u8fd9\u91cc\u662f\u83b7\u5f97\u5c5e\u6027\u4e3a color \u7684\u503c\r\n      }\r\n    },\r\n\r\n    Comment (comment, postcss) {\r\n        \/\/ \u53ef\u4ee5\u5feb\u901f\u8bbf\u95ee AST \u6ce8\u91ca\u8282\u70b9\uff08type \u4e3a comment\uff09\r\n    },\r\n\r\n    AtRule(atRule, postcss) {\r\n        \/\/ \u53ef\u4ee5\u5feb\u901f\u8bbf\u95ee css \u5982 @media\uff0c@import \u7b49 @\u5b9a\u4e49\u7684\u8282\u70b9\uff08type \u4e3a atRule\uff09\r\n    }\r\n\r\n  }\r\n}\r\nmodule.exports.postcss = true\r\n<\/code><\/pre>\n
\u66f4\u591a\u7684 PostCSS \u63d2\u4ef6 API \u53ef\u4ee5\u8be6\u7ec6\u53c2\u8003\u5b98\u65b9 PostCSS 8 \u6587\u6863 (https:\/\/postcss.org\/api\/)\uff0c\u57fa\u672c\u539f\u7406\u5c31\u662f PostCSS \u4f1a\u904d\u5386\u6bcf\u4e00\u4e2a css \u6837\u5f0f\u5c5e\u6027\u503c\u3001\u6ce8\u91ca\u7b49\u8282\u70b9\uff0c\u4e4b\u540e\u5f00\u53d1\u8005\u5c31\u53ef\u4ee5\u9488\u5bf9\u4e2a\u6027\u9700\u6c42\u5bf9\u8282\u70b9\u8fdb\u884c\u5904\u7406\u5373\u53ef\u3002<\/p>\n
\u5b9e\u9645\u5f00\u53d1\u4e00\u4e2a PostCSS 8 \u63d2\u4ef6<\/section>\n
\u4e86\u89e3\u4e86 PostCSS \u63d2\u4ef6\u7684\u683c\u5f0f\u548c API\uff0c\u6211\u4eec\u5c06\u6839\u636e\u5b9e\u9645\u9700\u6c42\u6765\u5f00\u53d1\u4e00\u4e2a\u7b80\u6613\u7684\u63d2\u4ef6\uff0c\u6709\u5982\u4e0b css\uff1a<\/p>\n
.demo {\r\n  font-size: 14px; \/*this is a comment*\/\r\n  color: #ffffff;\r\n}\r\n<\/code><\/pre>\n
\u9700\u6c42\u5982\u4e0b\uff1a<\/p>\n
    \n
  1. \u5220\u9664 css \u5185\u6ce8\u91ca<\/li>\n
  2. \u5c06\u6240\u6709\u989c\u8272\u4e3a\u5341\u516d\u8fdb\u5236\u7684#ffffff<\/code>\u8f6c\u4e3a css \u5185\u7f6e\u7684\u989c\u8272\u53d8\u91cfwhite<\/code><\/li>\n<\/ol>\n
    \u6839\u636e\u7b2c\u4e09\u8282\u7684\u63d2\u4ef6\u683c\u5f0f\uff0c\u672c\u6b21\u5f00\u53d1\u53ea\u9700\u4f7f\u7528Comment<\/code>\u548cDeclaration<\/code>\u63a5\u53e3\u5373\u53ef:<\/p>\n
    \/\/ plugin.js\r\nmodule.exports = (opts = { }) => {\r\n\r\n  return {\r\n    postcssPlugin: 'postcss-test',\r\n\r\n    Declaration (decl, postcss) {\r\n        if (decl.value === '#ffffff') {\r\n            decl.value = 'white'\r\n        }\r\n    },\r\n\r\n    Comment(comment) {\r\n      comment.text = ''\r\n    }\r\n\r\n  }\r\n}\r\nmodule.exports.postcss = true\r\n<\/code><\/pre>\n
    \u5728 PostCSS \u4e2d\u4f7f\u7528\u8be5\u63d2\u4ef6\uff1a<\/p>\n
    \/\/ index.js\r\nconst plugin = require('.\/plugin.js')\r\n\r\npostcss([plugin]).process(`\r\n.demo {\r\n  font-size: 14px; \/*this is a comment*\/\r\n  color: #ffffff;\r\n}\r\n`).then(result => {\r\n  console.log(result.css)\r\n})\r\n<\/code><\/pre>\n
    \u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
    .demo {\r\n  font-size: 14px; \/**\/\r\n  color: white;\r\n}\r\n<\/code><\/pre>\n
    \u53ef\u4ee5\u770b\u5230\uff0c\u5b57\u4f53\u989c\u8272\u503c\u5df2\u7ecf\u6210\u529f\u505a\u4e86\u8f6c\u6362\uff0c\u6ce8\u91ca\u5185\u5bb9\u5df2\u7ecf\u5220\u6389\uff0c\u4f46\u6ce8\u91ca\u6807\u8bc6\u7b26\u8fd8\u4f9d\u65e7\u5b58\u5728\uff0c\u8fd9\u662f\u56e0\u4e3a\u6ce8\u91ca\u8282\u70b9\u662f\u5305\u542b\/**\/<\/code>\u5185\u5bb9\u5b58\u5728\u7684\uff0c\u53ea\u8981 AST \u91cc\u6ce8\u91ca\u8282\u70b9\u8fd8\u5b58\u5728\uff0c\u6700\u540e PostCSS \u8fd8\u539f AST \u65f6\u8fd8\u662f\u4f1a\u628a\u8fd9\u6bb5\u5185\u5bb9\u8fd8\u539f\uff0c\u8981\u505a\u5230\u5f7b\u5e95\u5220\u6389\u6ce8\u91ca\uff0c\u9700\u8981\u5bf9 AST \u7684 nodes \u5b57\u6bb5\u8fdb\u884c\u904d\u5386\uff0c\u5c06 type \u4e3a comment \u7684\u8282\u70b9\u8fdb\u884c\u5220\u9664\uff0c\u63d2\u4ef6\u6e90\u7801\u4fee\u6539\u5982\u4e0b\uff1a<\/p>\n
    \/\/ plugin.js\r\nmodule.exports = (opts = { }) => {\r\n\r\n  \/\/ Work with options here\r\n  \/\/ https:\/\/postcss.org\/api\/#plugin\r\n\r\n  return {\r\n    postcssPlugin: 'postcss-test',\r\n\r\n    Once (root, postcss) {\r\n      \/\/ Transform CSS AST here\r\n      root.nodes.forEach(node => {\r\n        if (node.type === 'rule') {\r\n          node.nodes.forEach((n, i) => {\r\n            if (n.type === 'comment') {\r\n              node.nodes.splice(i, 1)\r\n            }\r\n          })\r\n        }\r\n      })\r\n    },\r\n\r\n\r\n\r\n    Declaration (decl, postcss) {\r\n      \/\/ The faster way to find Declaration node\r\n      if (decl.value === '#ffffff') {\r\n        decl.value = 'white'\r\n      }\r\n    }\r\n\r\n  }\r\n}\r\nmodule.exports.postcss = true\r\n<\/code><\/pre>\n
    \u91cd\u65b0\u6267\u884c PostCSS\uff0c\u7ed3\u679c\u5982\u4e0b\uff0c\u7b26\u5408\u9884\u671f\u3002<\/p>\n
    .demo {\r\n  font-size: 14px;\r\n  color: white;\r\n}\r\n<\/code><\/pre>\n
    \u63d2\u4ef6\u5f00\u53d1\u6ce8\u610f\u4e8b\u9879<\/section>\n
    \u901a\u8fc7\u5b9e\u64cd\u5f00\u53d1\u53ef\u4ee5\u770b\u5230\uff0c\u5f00\u53d1\u4e00\u4e2a PostCSS \u63d2\u4ef6\u5176\u5b9e\u5f88\u7b80\u5355\uff0c\u4f46\u5728\u5b9e\u9645\u7684\u63d2\u4ef6\u5f00\u53d1\u4e2d\uff0c\u5f00\u53d1\u8005\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u4e8b\u9879\uff1a<\/p>\n
    \u00a01. \u5c3d\u91cf\u4f7f\u63d2\u4ef6\u7b80\u5355\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u5230\u624b\u5373\u7528<\/section>\n
    Build code that is short, simple, clear, and modular.<\/p><\/blockquote>\n
    \u5c3d\u91cf\u4f7f\u4f60\u7684\u63d2\u4ef6\u548c\u4f7f\u7528\u8005\u4ee3\u7801\u89e3\u8026\uff0c\u5f00\u653e\u6709\u9650\u7684 API\uff0c\u540c\u65f6\u5f00\u53d1\u8005\u5728\u4f7f\u7528\u4f60\u7684\u63d2\u4ef6\u65f6\u4ece\u540d\u5b57\u5c31\u53ef\u4ee5\u77e5\u9053\u63d2\u4ef6\u7684\u529f\u80fd\u3002\u8fd9\u91cc\u63a8\u8350\u4e00\u4e2a\u7b80\u5355\u800c\u4f18\u96c5\u7684 PostCSS \u63d2\u4ef6 postcss-focus(https:\/\/github.com\/postcss\/postcss-focus)\uff0c\u8bfb\u8005\u53ef\u4ee5\u4ece\u8fd9\u4e2a\u63d2\u4ef6\u7684\u6e90\u7801\u4e2d\u4f53\u4f1a\u8fd9\u4e2a\u8bbe\u8ba1\u7406\u5ff5\u3002<\/p>\n
    \u00a02. \u5f00\u53d1\u63d2\u4ef6\u524d\u786e\u8ba4\u662f\u5426\u6709\u73b0\u6210\u7684\u8f6e\u5b50<\/section>\n
    \u5982\u679c\u4f60\u5bf9\u81ea\u5df1\u7684\u9879\u76ee\u6709\u4e2a\u65b0\u70b9\u5b50\uff0c\u60f3\u81ea\u5df1\u5f00\u53d1\u4e00\u4e2a\u63d2\u4ef6\u53bb\u5b9e\u73b0\uff0c\u5728\u5f00\u59cb\u5199\u4ee3\u7801\u524d\uff0c\u53ef\u4ee5\u5148\u5230 PostCSS \u5b98\u65b9\u6ce8\u518c\u7684\u63d2\u4ef6\u5217\u8868 (https:\/\/github.com\/postcss\/postcss\/blob\/main\/docs\/plugins.md) \u4e2d\u67e5\u770b\u662f\u5426\u6709\u7b26\u5408\u81ea\u5df1\u9700\u6c42\u7684\u63d2\u4ef6\uff0c\u907f\u514d\u91cd\u590d\u9020\u8f6e\u5b50\u3002\u4e0d\u8fc7\u622a\u6b62\u76ee\u524d (2021.8)\uff0c\u5927\u90e8\u5206\u63d2\u4ef6\u4f9d\u65e7\u505c\u7559\u5728 PostCSS 8 \u4ee5\u4e0b\uff0c\u867d\u7136 PostCSS 8 \u5df2\u7ecf\u5bf9\u65e7\u7248\u672c\u63d2\u4ef6\u505a\u4e86\u5904\u7406\uff0c\u4f46\u5728 AST \u7684\u89e3\u6790\u5904\u7406\u4e0a\u8fd8\u662f\u6709\u5dee\u5f02\uff0c\u4ece\u5b9e\u9645\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u6211\u5c31\u53d1\u73b0 PostCss8 \u4f7f\u7528\u4f4e\u7248\u672c\u63d2\u4ef6\u4f1a\u5bfc\u81f4 AST \u5185\u7684 source map \u4e22\u5931 (https:\/\/github.com\/leodido\/postcss-clean\/issues\/17)\uff0c\u56e0\u6b64\u76ee\u524d\u800c\u8a00\u5b8c\u5168\u517c\u5bb9 PostCSS 8 \u7684\u63d2\u4ef6\u8fd8\u9700\u5404\u4f4d\u5f00\u53d1\u8005\u53bb\u5347\u7ea7\u3002<\/p>\n
    \u4ece\u4f4e\u7248\u672c PostCSS \u8fc1\u79fb<\/section>\n
    \u5347\u7ea7\u4f60\u7684 PostCSS \u63d2\u4ef6\u5177\u4f53\u53ef\u4ee5\u53c2\u8003\u5b98\u65b9\u7ed9\u51fa\u7684 \u5347\u7ea7\u6307\u5f15\u3002\u8fd9\u91cc\u53ea\u5bf9\u90e8\u5206\u5173\u952e\u90e8\u5206\u505a\u4e0b\u89e3\u91ca\uff1a<\/p>\n
    \n
    \u00a01. \u5347\u7ea7 API<\/section>\n<\/section>\n
      \n
    • \u5c06\u65e7\u7248module.exports = postcss.plugin(name, creator)<\/code>\u66ff\u6362\u4e3amodule.exports = creator<\/code>\uff1b<\/li>\n
    • \u65b0\u7248\u63d2\u4ef6\u5c06\u76f4\u63a5\u8fd4\u56de\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5bf9\u8c61\u5185\u5305\u542bOnce<\/code>\u65b9\u6cd5\u56de\u8c03\uff1b<\/li>\n
    • \u5c06\u539f\u63d2\u4ef6\u903b\u8f91\u4ee3\u7801\u8f6c\u79fb\u81f3Once<\/code>\u65b9\u6cd5\u5185\uff1b<\/li>\n
    • \u63d2\u4ef6\u6e90\u7801\u6700\u540e\u52a0\u4e0amodule.exports.postcss = true<\/code>\uff1b<\/li>\n<\/ul>\n
      \u5177\u4f53\u793a\u4f8b\u5982\u4e0b\u3002<\/p>\n
      \u65e7\u7248\u63d2\u4ef6\uff1a<\/p>\n
      - module.exports = postcss.plugin('postcss-dark-theme-class', (opts = {}) => {\r\n-   checkOpts(opts)\r\n-   return (root, result) => {\r\n      root.walkAtRules(atrule => { \u2026 })\r\n-   }\r\n- })\r\n<\/code><\/pre>\n
      \u5347\u7ea7\u540e\u63d2\u4ef6\uff1a<\/p>\n
      + module.exports = (opts = {}) => {\r\n+   checkOpts(opts)\r\n+   return {\r\n+     postcssPlugin: 'postcss-dark-theme-class',\r\n+     Once (root, { result }) {\r\n        root.walkAtRules(atrule => { \u2026 })\r\n+     }\r\n+   }\r\n+ }\r\n+ module.exports.postcss = true\r\n<\/code><\/pre>\n
      \n
      \u00a02. \u63d0\u53d6\u903b\u8f91\u4ee3\u7801\u81f3\u65b0\u7248 API<\/section>\n<\/section>\n
      \u628a\u903b\u8f91\u4ee3\u7801\u90fd\u653e\u5728Once<\/code>\u56de\u8c03\u5185\u8fd8\u4e0d\u591f\u4f18\u96c5\uff0cPostCSS 8 \u5df2\u7ecf\u5b9e\u73b0\u4e86\u5355\u4e2a css \u7684\u4ee3\u7801\u626b\u63cf\uff0c\u63d0\u4f9b\u4e86Declaration()<\/code>, Rule()<\/code>, AtRule()<\/code>, Comment()<\/code>\u7b49\u65b9\u6cd5\uff0c\u65e7\u7248\u63d2\u4ef6\u7c7b\u4f3croot.walkAtRules<\/code>\u7684\u65b9\u6cd5\u5c31\u53ef\u4ee5\u5206\u522b\u8fdb\u884c\u91cd\u6784\uff0c\u63d2\u4ef6\u6548\u7387\u4e5f\u4f1a\u5f97\u5230\u63d0\u5347:<\/p>\n
        module.exports = {\r\n    postcssPlugin: 'postcss-dark-theme-class',\r\n-   Once (root) {\r\n-     root.walkAtRules(atRule => {\r\n-       \/\/ Slow\r\n-     })\r\n-   }\r\n+   AtRule (atRule) {\r\n+     \/\/ Faster\r\n+   }\r\n  }\r\n  module.exports.postcss = true\r\n<\/code><\/pre>\n
      \u603b\u00a0 \u7ed3<\/section>\n
      \u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd\uff0c\u8bfb\u8005\u53ef\u4ee5\u4e86\u89e3 PostCSS 8 \u5de5\u4f5c\u7684\u57fa\u672c\u539f\u7406\uff0c\u6839\u636e\u5177\u4f53\u9700\u6c42\u5feb\u901f\u5f00\u53d1\u4e00\u4e2a PostCSS 8 \u63d2\u4ef6\uff0c\u5e76\u5728\u6700\u540e\u5f15\u7528\u5b98\u65b9\u793a\u4f8b\u4e2d\u4ecb\u7ecd\u4e86\u5982\u4f55\u5feb\u901f\u5347\u7ea7\u65e7\u7248 PostCSS \u63d2\u4ef6\u3002\u76ee\u524d PostCSS 8 \u8fd8\u6709\u5927\u91cf\u8fd8\u6ca1\u8fdb\u884c\u5347\u7ea7\u517c\u5bb9\u7684 PostCSS \u63d2\u4ef6\uff0c\u5e0c\u671b\u8bfb\u8005\u53ef\u4ee5\u5728\u9605\u8bfb\u672c\u6587\u540e\u53ef\u4ee5\u83b7\u5f97\u542f\u53d1\uff0c\u5bf9 PostCSS 8 \u7684\u63d2\u4ef6\u751f\u6001\u505a\u51fa\u8d21\u732e\u3002<\/p>\n
      <\/div>\n
      <\/g><\/svg><\/i> \"Loading\"<\/p>\n
      <\/div>\n","protected":false},"excerpt":{"rendered":"
      \u4f5c\u8005 | \u674e\u4f73\u6d69 \u7b14\u8005\u8fd1\u671f\u5728\u5c06\u524d\u7aef\u67b6\u6784 webpack \u5347\u7ea7\u5230 5 \u65f6\uff0c\u4e00\u4e9b\u914d\u5957\u6a21\u5757\u4e5f\u9700\u8981\u8fdb\u884c\u5347\u7ea7\uff0c\u5176\u4e2d\u5305\u62ec\u4e86 […]<\/p>\n
      <\/div>\n
      <\/g><\/svg><\/i> \"Loading\"<\/p>\n
      <\/div>\n","protected":false},"author":1,"featured_media":1398,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1397","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ai"],"_links":{"self":[{"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/posts\/1397","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/comments?post=1397"}],"version-history":[{"count":1,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/posts\/1397\/revisions"}],"predecessor-version":[{"id":1400,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/posts\/1397\/revisions\/1400"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/media\/1398"}],"wp:attachment":[{"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/media?parent=1397"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/categories?post=1397"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/tags?post=1397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}