{"id":300957,"date":"2024-05-20T17:55:39","date_gmt":"2024-05-20T09:55:39","guid":{"rendered":""},"modified":"2024-05-20T17:55:59","modified_gmt":"2024-05-20T09:55:59","slug":"%e5%a6%82%e4%bd%95%e7%bc%96%e5%86%99%e4%b8%80%e4%b8%aa-webpack-%e7%9a%84-loader","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/300957.html","title":{"rendered":"\u5982\u4f55\u7f16\u5199\u4e00\u4e2a  webpack \u7684  loader"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/26213126\/0bf0db82-3b6e-40f2-8077-68067f7cfbde.webp\" alt=\"\u5982\u4f55\u7f16\u5199\u4e00\u4e2a  webpack \u7684  loader\" \/><\/p>\n<p><p>\u8981\u7f16\u5199\u4e00\u4e2awebpack\u7684loader\uff0c\u5173\u952e\u5728\u4e8e\u7406\u89e3\u5176\u4f5c\u7528\u3001\u9075\u5faa\u7279\u5b9a\u7684\u7f16\u5199\u6a21\u5f0f\uff0c\u5e76\u6709\u6548\u4f7f\u7528loader 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API<\/h2>\n<\/p>\n<p><p>Webpack\u7684Loader API\u63d0\u4f9b\u4e86\u4e00\u5957\u7ea6\u5b9a\u548c\u5de5\u5177\uff0c\u4f7fLoader\u7684\u5f00\u53d1\u6210\u4e3a\u53ef\u80fd\u3002\u9075\u5b88\u8fd9\u4e9bAPI\u7ea6\u5b9a\u662f\u7f16\u5199\u6709\u6548Loader\u7684\u5173\u952e\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>context\uff08\u4e0a\u4e0b\u6587\uff09<\/strong>\uff1aWebpack\u63d0\u4f9b\u7ed9Loader\u7684\u4e0a\u4e0b\u6587\u4e2d\u5305\u542b\u4e86\u5927\u91cf\u7684\u6709\u7528\u4fe1\u606f\u3002\u6bd4\u5982\uff0cLoader\u53ef\u4ee5\u901a\u8fc7\u4e0a\u4e0b\u6587\u6765\u83b7\u53d6\u5f53\u524d\u5904\u7406\u6587\u4ef6\u7684\u8def\u5f84\u3001\u67e5\u8be2\u53c2\u6570\u7b49\u4fe1\u606f\uff0c\u8fd9\u4e9b\u90fd\u662f\u5904\u7406\u6587\u4ef6\u65f6\u53ef\u80fd\u9700\u8981\u7528\u5230\u7684\u4fe1\u606f\u3002<\/li>\n<li><strong>callback\u51fd\u6570<\/strong>\uff1aLoader\u901a\u5e38\u4f1a\u5229\u7528callback\u51fd\u6570\u8fd4\u56de\u5904\u7406\u7ed3\u679c\u3002\u8fd9\u4e2a\u51fd\u6570\u5141\u8bb8\u4f60\u5f02\u6b65\u5730\u5904\u7406\u6587\u4ef6\uff0c\u5e76\u5728\u5904\u7406\u5b8c\u6210\u540e\u5c06\u7ed3\u679c\u8fd4\u56de\u7ed9webpack\u3002<\/li>\n<\/ul>\n<p><p>\u7f16\u5199Loader\u65f6\uff0c\u5145\u5206\u5229\u7528\u8fd9\u4e9bAPI\u80fd\u591f\u8ba9\u4f60\u7684Loader\u66f4\u52a0\u7075\u6d3b\u548c\u5f3a\u5927\u3002<\/p>\n<\/p>\n<p><h2>\u4e09\u3001\u5229\u7528LOADER 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href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" target=\"_blank\">AI<\/a>t\u6765\u7ba1\u7406\u5f02\u6b65\u64cd\u4f5c\uff0c\u6709\u52a9\u4e8e\u63d0\u9ad8Loader\u7684\u6267\u884c\u6548\u7387\u548c\u7a33\u5b9a\u6027\u3002<\/li>\n<\/ul>\n<p><h2>\u4e94\u3001\u7f16\u5199\u53ef\u914d\u7f6e\u7684LOADER<\/h2>\n<\/p>\n<p><p>\u5bf9\u4e8e\u590d\u6742\u7684Loader\uff0c\u63d0\u4f9b\u53ef\u914d\u7f6e\u9009\u9879\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u5b9e\u8df5\u3002\u8fd9\u6837\u7528\u6237\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u9700\u6c42\u6765\u8c03\u6574Loader\u7684\u884c\u4e3a\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u89e3\u6790options<\/strong>\uff1a\u5728Loader\u51fd\u6570\u5f00\u59cb\u5904\uff0c\u4f7f\u7528loader-utils\u7684<code>getOptions<\/code>\u51fd\u6570\u6765\u89e3\u6790\u4f20\u5165\u7684options\uff0c\u57fa\u4e8e\u8fd9\u4e9boptions\u6765\u8c03\u6574Loader\u7684\u884c\u4e3a\u3002<\/li>\n<li><strong>\u5408\u7406\u4f7f\u7528\u9ed8\u8ba4\u503c<\/strong>\uff1a\u4e3a\u4f60\u7684Loader\u7684\u914d\u7f6e\u9009\u9879\u63d0\u4f9b\u5408\u7406\u7684\u9ed8\u8ba4\u503c\uff0c\u786e\u4fdd\u5373\u4fbf\u7528\u6237\u6ca1\u6709\u63d0\u4f9b\u67d0\u4e9b\u914d\u7f6e\uff0cLoader\u4e5f\u80fd\u6309\u7167\u9884\u671f\u7684\u65b9\u5f0f\u8fd0\u884c\u3002<\/li>\n<\/ul>\n<p><h2>\u516d\u3001\u8fdb\u884c\u6d4b\u8bd5\u548c\u8c03\u8bd5<\/h2>\n<\/p>\n<p><p>\u50cf\u5f00\u53d1\u4efb\u4f55\u8f6f\u4ef6\u7ec4\u4ef6\u4e00\u6837\uff0c\u7f16\u5199Loader\u4e5f\u9700\u8981\u7ecf\u8fc7\u5145\u5206\u7684\u6d4b\u8bd5\u548c\u8c03\u8bd5\u3002\u786e\u4fdd\u4f60\u7684Loader\u5728\u4e0d\u540c\u7684\u573a\u666f\u548c\u914d\u7f6e\u4e0b\u90fd\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u7f16\u5199\u5355\u5143\u6d4b\u8bd5<\/strong>\uff1a\u4f7f\u7528Jest\u7b49\u6d4b\u8bd5\u6846\u67b6\u6765\u4e3a\u4f60\u7684Loader\u7f16\u5199\u5355\u5143\u6d4b\u8bd5\u3002\u786e\u4fdd\u4e3b\u8981\u7684\u529f\u80fd\u548c\u8fb9\u754c\u6761\u4ef6\u5f97\u5230\u4e86\u8986\u76d6\u3002<\/li>\n<li><strong>\u4f7f\u7528webpack\u8fdb\u884c\u96c6\u6210\u6d4b\u8bd5<\/strong>\uff1a\u9664\u4e86\u5355\u5143\u6d4b\u8bd5\uff0c\u4f7f\u7528webpack\u6784\u5efa\u6765\u8fdb\u884c\u96c6\u6210\u6d4b\u8bd5\u4e5f\u5f88\u91cd\u8981\u3002\u8fd9\u53ef\u4ee5\u5e2e\u52a9\u4f60\u786e\u4fddLoader\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\u4e0ewebpack\u7684\u96c6\u6210\u65e0\u7f1d\u3001\u65e0\u8bef\u3002<\/li>\n<\/ul>\n<p><p>\u901a\u8fc7\u9075\u5faa\u4e0a\u8ff0\u51c6\u5219\uff0c\u4f60\u53ef\u4ee5\u7f16\u5199\u51fa\u65e2\u9ad8\u6548\u53c8\u5f3a\u5927\u7684webpack Loader\uff0c\u4f7f\u5176\u80fd\u591f\u5728webpack\u7684\u5f3a\u5927\u751f\u6001\u7cfb\u7edf\u4e2d\u53d1\u6325\u91cd\u8981\u4f5c\u7528\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>\u95ee\u98981\uff1a\u5982\u4f55\u521b\u5efa\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684Webpack Loader\uff1f<\/strong><\/p>\n<p>\u7f16\u5199\u4e00\u4e2aWebpack Loader\u53ef\u4ee5\u8ba9\u4f60\u5bf9\u4ee3\u7801\u8fdb\u884c\u81ea\u5b9a\u4e49\u5904\u7406\uff0c\u5982\u8f6c\u6362\u3001\u683c\u5f0f\u5316\u6216\u8005\u4efb\u4f55\u5176\u4ed6\u4f60\u9700\u8981\u7684\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u521b\u5efa\u4e00\u4e2a\u81ea\u5b9a\u4e49Webpack Loader\u7684\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li>\n<p>\u521b\u5efa\u4e00\u4e2a\u65b0\u7684JavaScript\u6587\u4ef6\uff0c\u547d\u540d\u4e3a<code>my-loader.js<\/code>\uff08\u53ef\u4ee5\u66ff\u6362\u4e3a\u4f60\u81ea\u5df1\u559c\u6b22\u7684\u540d\u5b57\uff09\u3002<\/p>\n<\/li>\n<li>\n<p>\u5728<code>my-loader.js<\/code>\u4e2d\uff0c\u7f16\u5199\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u5c06\u4f5c\u4e3aWebpack Loader\u7684\u5904\u7406\u51fd\u6570\u3002\u8fd9\u4e2a\u51fd\u6570\u63a5\u6536\u4e00\u4e2a\u53c2\u6570\uff0c\u5373\u9700\u8981\u5904\u7406\u7684\u6e90\u4ee3\u7801\u5b57\u7b26\u4e32\u3002<\/p>\n<\/li>\n<li>\n<p>\u5728\u51fd\u6570\u4f53\u5185\uff0c\u4f60\u53ef\u4ee5\u5bf9\u6e90\u4ee3\u7801\u8fdb\u884c\u4efb\u4f55\u4f60\u9700\u8981\u7684\u64cd\u4f5c\uff0c\u6bd4\u5982\u89e3\u6790\u3001\u8f6c\u6362\u3001\u6dfb\u52a0\/\u5220\u9664\u4ee3\u7801\u7b49\u3002<\/p>\n<\/li>\n<li>\n<p>\u5904\u7406\u5b8c\u6210\u540e\uff0c\u901a\u8fc7<code>return<\/code>\u5173\u952e\u5b57\u5c06\u5904\u7406\u7ed3\u679c\u8fd4\u56de\u3002<\/p>\n<\/li>\n<li>\n<p>\u4fdd\u5b58<code>my-loader.js<\/code>\u6587\u4ef6\u3002<\/p>\n<\/li>\n<li>\n<p>\u6253\u5f00\u4f60\u7684Webpack\u914d\u7f6e\u6587\u4ef6\uff08\u901a\u5e38\u662f<code>webpack.config.js<\/code>\uff09\uff0c\u5728<code>module.rules<\/code>\u6570\u7ec4\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684rule\uff0c\u7528\u6765\u6307\u5b9a\u4f7f\u7528\u4f60\u7684\u81ea\u5b9a\u4e49Loader\u3002<\/p>\n<pre><code class=\"language-javascript\">module: {\n  rules: [\n    \/\/ \u5176\u4ed6\u89c4\u5219...\n    {\n      test: \/\\.js$\/,  \/\/ \u5339\u914d\u4f60\u60f3\u8981\u5904\u7406\u7684\u6587\u4ef6\u7c7b\u578b\uff0c\u4f8b\u5982\u5904\u7406JavaScript\u6587\u4ef6\n      use: [\n        &#039;babel-loader&#039;, \/\/ \u5176\u4ed6\u5df2\u6709\u7684Loader\n        path.resolve(__dirname, &#039;my-loader.js&#039;) \/\/ \u4f7f\u7528\u4f60\u7684\u81ea\u5b9a\u4e49Loader\n      ]\n    }\n  ]\n}\n<\/code><\/pre>\n<\/li>\n<li>\n<p>\u4fdd\u5b58Webpack\u914d\u7f6e\u6587\u4ef6\uff0c\u5e76\u91cd\u65b0\u8fd0\u884cWebpack\u3002\u73b0\u5728\uff0cWebpack\u4f1a\u81ea\u52a8\u4f7f\u7528\u4f60\u7684\u81ea\u5b9a\u4e49Loader\u6765\u5904\u7406\u5339\u914d\u5230\u7684\u6587\u4ef6\u3002<\/p>\n<\/li>\n<\/ol>\n<p><strong>\u95ee\u98982\uff1a\u5982\u4f55\u5728Webpack Loader\u4e2d\u4f7f\u7528\u5176\u4ed6Loader\uff1f<\/strong><\/p>\n<p>\u6709\u65f6\u5019\uff0c\u4f60\u7684\u81ea\u5b9a\u4e49Loader\u53ef\u80fd\u9700\u8981\u4f9d\u8d56\u5176\u4ed6\u5df2\u6709\u7684Loader\u6765\u5b8c\u6210\u4e00\u4e9b\u4efb\u52a1\u3002\u4f60\u53ef\u4ee5\u5728\u81ea\u5b9a\u4e49Loader\u4e2d\u4f7f\u7528<code>!<\/code>\u7b26\u53f7\u6765\u4e32\u8054\u591a\u4e2aLoader\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<pre><code class=\"language-javascript\">module: {\n  rules: [\n    {\n      test: \/\\.scss$\/,  \/\/ \u5339\u914d\u4f60\u60f3\u8981\u5904\u7406\u7684\u6587\u4ef6\u7c7b\u578b\n      use: [\n        &#039;style-loader&#039;, \/\/ \u5c06CSS\u52a8\u6001\u5730\u6ce8\u5165\u5230\u9875\u9762\u4e2d\n        &#039;css-loader&#039;,   \/\/ \u5904\u7406CSS\u6587\u4ef6\n        &#039;sass-loader&#039;,  \/\/ \u5904\u7406Sass\/Scss\u6587\u4ef6\n        path.resolve(__dirname, &#039;my-loader.js&#039;) \/\/ \u4f7f\u7528\u4f60\u7684\u81ea\u5b9a\u4e49Loader\n      ]\n    }\n  ]\n}\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cWebpack\u9996\u5148\u4f1a\u4f7f\u7528<code>sass-loader<\/code>\u5904\u7406<code>.scss<\/code>\u6587\u4ef6\uff0c\u7136\u540e\u4f7f\u7528<code>css-loader<\/code>\u5904\u7406\u751f\u6210\u7684CSS\u6587\u4ef6\uff0c\u63a5\u7740\u4f7f\u7528<code>style-loader<\/code>\u5c06\u6700\u7ec8\u7684CSS\u6ce8\u5165\u5230\u9875\u9762\u4e2d\u3002\u6700\u540e\uff0c\u4f7f\u7528\u4f60\u7684\u81ea\u5b9a\u4e49Loader<code>my-loader.js<\/code>\u5bf9CSS\u8fdb\u884c\u5904\u7406\u3002<\/p>\n<p><strong>\u95ee\u98983\uff1a\u5982\u4f55\u5728Webpack Loader\u4e2d\u5904\u7406\u5176\u4ed6\u8d44\u6e90\u6587\u4ef6\uff1f<\/strong><\/p>\n<p>\u9664\u4e86\u5904\u7406\u4ee3\u7801\u6587\u4ef6\uff0cWebpack Loader\u4e5f\u53ef\u4ee5\u7528\u6765\u5904\u7406\u5176\u4ed6\u7c7b\u578b\u7684\u8d44\u6e90\u6587\u4ef6\uff0c\u5982\u56fe\u7247\u3001\u5b57\u4f53\u7b49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728\u81ea\u5b9a\u4e49Loader\u4e2d\u5904\u7406\u56fe\u7247\u6587\u4ef6\uff1a<\/p>\n<pre><code class=\"language-javascript\">module: {\n  rules: [\n    {\n      test: \/\\.(png|jpg|gif)$\/i,  \/\/ \u5339\u914d\u4f60\u60f3\u8981\u5904\u7406\u7684\u6587\u4ef6\u7c7b\u578b\uff0c\u4f8b\u5982\u5904\u7406PNG\u3001JPG\u548cGIF\u56fe\u7247\n      use: [\n        {\n          loader: &#039;url-loader&#039;,\n          options: {\n            limit: 8192,  \/\/ \u5c0f\u4e8e8KB\u7684\u56fe\u7247\u4f1a\u88ab\u8f6c\u6362\u6210Base64\u7f16\u7801\n            name: &#039;[name].[ext]&#039;,  \/\/ \u8f93\u51fa\u6587\u4ef6\u540d\u548c\u6269\u5c55\u540d\u4e0d\u53d8\n            outputPath: &#039;images\/&#039;  \/\/ \u8f93\u51fa\u5230\u6307\u5b9a\u76ee\u5f55\u4e0b\n          }\n        },\n        path.resolve(__dirname, &#039;my-loader.js&#039;) \/\/ \u4f7f\u7528\u4f60\u7684\u81ea\u5b9a\u4e49Loader\n      ]\n    }\n  ]\n}\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cWebpack\u9996\u5148\u4f7f\u7528<code>url-loader<\/code>\u5bf9\u56fe\u7247\u6587\u4ef6\u8fdb\u884c\u5904\u7406\u3002\u5982\u679c\u56fe\u7247\u6587\u4ef6\u7684\u4f53\u79ef\u5c0f\u4e8e8KB\uff0c\u5b83\u5c06\u88ab\u8f6c\u6362\u6210Base64\u7f16\u7801\uff0c\u5e76\u63d2\u5165\u5230\u751f\u6210\u7684JavaScript\u6587\u4ef6\u4e2d\uff1b\u5426\u5219\uff0c\u5c06\u751f\u6210\u4e00\u4e2a\u72ec\u7acb\u7684\u56fe\u7247\u6587\u4ef6\u3002\u7136\u540e\uff0c\u4f7f\u7528\u4f60\u7684\u81ea\u5b9a\u4e49Loader<code>my-loader.js<\/code>\u5bf9\u5904\u7406\u540e\u7684\u56fe\u7247\u6587\u4ef6\u8fdb\u884c\u8fdb\u4e00\u6b65\u64cd\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u8981\u7f16\u5199\u4e00\u4e2awebpack\u7684loader\uff0c\u5173\u952e\u5728\u4e8e\u7406\u89e3\u5176\u4f5c\u7528\u3001\u9075\u5faa\u7279\u5b9a\u7684\u7f16\u5199\u6a21\u5f0f\uff0c\u5e76\u6709\u6548\u4f7f\u7528loader API [&hellip;]","protected":false},"author":3,"featured_media":300985,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/300957"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=300957"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/300957\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/300985"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=300957"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=300957"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=300957"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}