{"id":473,"date":"2022-09-03T16:34:19","date_gmt":"2022-09-03T08:34:19","guid":{"rendered":"http:\/\/gjweb.top\/?p=473"},"modified":"2022-09-03T16:38:16","modified_gmt":"2022-09-03T08:38:16","slug":"04-webpack-%e4%bc%98%e5%8c%96%e7%af%87%ef%bc%88%e4%ba%8c%ef%bc%89","status":"publish","type":"post","link":"https:\/\/gjweb.top\/?p=473","title":{"rendered":"04. webpack \u4f18\u5316\u7bc7\uff08\u4e8c\uff09"},"content":{"rendered":"\n
  1. tree shaking (\u6447\u6811\u4f18\u5316)<\/li>
  2. \u5206\u5272\u6253\u5305<\/li>
  3. webpack \u61d2\u52a0\u8f7d\u548c\u9884\u52a0\u8f7d<\/li>
  4. PWA \u6e10\u8fdb\u5f0f\u7f51\u7edc\u5f00\u53d1\u5e94\u7528\u7a0b\u5e8f<\/li>
  5. webpack \u591a\u8fdb\u7a0b\u6253\u5305<\/li>
  6. webpack externals ( CND \u6253\u5305\u4f18\u5316)<\/li>
  7. webpack dll (\u52a8\u6001\u94fe\u63a5\u5e93)<\/li><\/ol>\n\n\n\n
    \n\n\n\n

    1. tree shaking \u6447\u6811\u4f18\u5316<\/h2>\n\n\n\n
    • \u524d\u63d0
      • \u5fc5\u987b\u8981\u4f7f\u7528 ES6 \u6a21\u5757\u5316<\/li>
      • \u5f00\u542f production \u73af\u5883<\/li><\/ul><\/li>
      • \u4f5c\u7528
        • \u51cf\u5c11\u4ee3\u7801\u4f53\u79ef<\/li><\/ul><\/li>
        • \u6ce8\u610f\u4e8b\u9879
          • package.json \u4e2d\u914d\u7f6e ‘sideEffects’:false \u8868\u793a\u6240\u6709\u6587\u4ef6\u90fd\u6ca1\u6709\u526f\u4f5c\u7528 (\u53ef\u4ee5\u88ab\u4f18\u5316,\u4f1a\u5bfc\u81f4 js \u4e2d\u5f15\u5165\u7684 css\u6587\u4ef6\u4e0d\u4f1a\u88ab\u7f16\u8bd1)<\/li>
          • \u66f4\u6539 ‘sideEffects’:[‘*.css’]<\/li><\/ul><\/li><\/ul>\n\n\n\n
            \n\n\n\n

            2.\u4ee3\u7801\u5206\u5272<\/h2>\n\n\n\n

            \u65b9\u5f0f\u4e00 \u591a\u6587\u4ef6\u6253\u5305<\/h3>\n\n\n\n
            entry:{\n    index:\".\/src\/index.js\",\n    test:\".\/src\/test.js\"\n},\noutput:{\n    filename:\"js\/[name][hash:10].js\",\n    path:resolve(__dirname,\"dist\")\n}<\/code><\/pre>\n\n\n\n
            [name] \u6620\u5c04\u7684\u662f enty \u7684 key \u503c\uff0c\u800c\u4e0d\u662f \u8def\u5f84\u672c\u8eab\u7684\u6587\u4ef6\u540d<\/p>\n\n\n\n
            \u65b9\u62fe\u4e8c \u516c\u5171\u6587\u4ef6\u62bd\u79bb<\/h3>\n\n\n\n
            optimization:{\n    splitChunks:{\n        chunks:\"all\"\n    }\n}<\/code><\/pre>\n\n\n\n
            • \u53ef\u5c06 node_modules \u4e2d\u7684\u4ee3\u7801\u5355\u72ec\u6253\u5305\u8f93\u51fa\u4e00\u4e2a chunk (\u5355\u5165\u53e3\u6253\u5305\u53ea\u505a\u8fd9\u4e00\u6b65)<\/li>
            • \u81ea\u52a8\u5206\u6790\u591a\u5165\u53e3 chunk ,\u5982\u679c\u6709\u516c\u5171\u6587\u4ef6,\u4f1a\u6253\u5305\u6210\u4e00\u4e2a\u72ec\u7acb\u7684chunk (\u591a\u5165\u53e3\u8fd0\u884c\u5168\u90e8\u6b65\u9aa4)<\/li><\/ul>\n\n\n\n
              \u65b9\u5f0f\u4e09 \u4f7f\u7528JS\u4ee3\u7801\u52a8\u6001\u5f15\u5165<\/h3>\n\n\n\n
              import(\/*webpackChunkName:'test'*\/'.\/test').then((result)=>{\n     console.log(\"\u6587\u4ef6\u52a0\u8f7d\u6210\u529f\"\uff0cresult)\n}).catch((err)=>{\n    console.log('\u6587\u4ef6\u52a0\u8f7d\u5931\u8d25',err)\n})<\/code><\/pre>\n\n\n\n
              \n\n\n\n
              3. webpack \u61d2\u52a0\u8f7d\u548c\u9884\u52a0\u8f7d<\/h2>\n\n\n\n
              \u61d2\u52a0\u8f7d<\/h3>\n\n\n\n
              document.getElementById(\"btn\").onclick = ()=>{\n    import(\/*webpackChunkName:'test'*\/'.\/test.js').then(({add})=>{\n        add(1,2) \/\/ 3\n    }).catch(()=>{\n        \/\/ \u52a0\u8f7d\u5931\u8d25\n    })\n}<\/code><\/pre>\n\n\n\n
              \u9884\u52a0\u8f7d<\/h3>\n\n\n\n
              document.getElementById(\"btn\").onclick = ()=>{\n    import(\/*webpackChunkName:'test',*\/)\n}<\/code><\/pre>\n\n\n\n
              \n\n\n\n
              4.PWA \u6e10\u8fdb\u5f0f\u7f51\u7edc\u5f00\u53d1\u5e94\u7528\u7a0b\u5e8f<\/h2>\n\n\n\n
              \u9ad8\u5927\u4e0a\u7684\u540d\u5b57\u6709\u4e00\u4e2a\u5b9e\u7528\u7684\u53eb\u6cd5\uff1a\u8bbe\u5907\u79bb\u7ebf\u7f13\u5b58\u6280\u672f<\/p>\n\n\n\n
              \u5b89\u88c5\u4f9d\u8d56<\/p>\n\n\n\n
              yarn add workboxWebpackPlugin -D<\/code><\/pre>\n\n\n\n
              webpack.config.js<\/p>\n\n\n\n
              const WorkboxWebpackPliugin = require(workbox-webpack-plugin)\nplugins:[\n    new WorkboxWebpackPlugin.GenerateSW({\n        clientsClaim:true,\n        skipWaiting:true\n    })\n]<\/code><\/pre>\n\n\n\n
              package.json \u914d\u7f6e<\/p>\n\n\n\n
              \"eslintConfig\":{\n    \"env\":{\n        \"browser\":true \/\/ \u5f00\u653eEslint\u8bc6\u522b\u6d4f\u89c8\u5668\u4e2d\u7684\u5168\u5c40\u5c5e\u6027\n    }\n}<\/code><\/pre>\n\n\n\n
              \u5165\u53e3\u6587\u4ef6.JS \u914d\u7f6e<\/p>\n\n\n\n
              if(\"serviceWorker\" in navigator){\n    window.addEventListener(\"load\",()=>{\n        navigator.serviceWorker.register(\"\/service-worke.js\").then(()=>{\n            console.log(\"\u6ce8\u518c\u6210\u529f\")\n        }).catch(()=>{\n            console.log(\"\u6ce8\u518c\u5931\u8d25\")\n        })\n    })\n}<\/code><\/pre>\n\n\n\n
              \n\n\n\n
              5. webpack \u591a\u8fdb\u7a0b\u6253\u5305<\/h2>\n\n\n\n
              \u6ce8\u610f\uff1a\u542f\u52a8\u591a\u8fdb\u7a0b\u6253\u5305\u7684\u65f6\u95f4\u5927\u6982600ms\uff0c\u53ea\u6709\u7684\u8fc7\u5927\u7684\u6587\u4ef6\u7f16\u8bd1\u65f6\u9700\u8981\u5f00\u542f\u591a\u8fdb\u7a0b\u3002<\/p>\n\n\n\n
              \u5b89\u88c5<\/p>\n\n\n\n
              yarn  add thread-loader -D<\/code><\/pre>\n\n\n\n
              \u914d\u7f6e\u9879<\/p>\n\n\n\n
              module:{\n    rules:[\n        {\n            test:\/\\.js$\/,\n            exclude:\/node_nodules\/,\n            use:[\n                {\n                    loader:\"threed-loader\" \/\/ \u5bf9JS\u6587\u4ef6\u884c\u591a\u8fdb\u7a0b\u6253\u5305\u5904\u7406\n                },\n                {\n                    loader:\"babel-loader\",\n                    options:{\n                        persets:[\n                            \"@babel\/perset-env\",\n                            [\n                                useBuiltIns:\"usage\",\n                                corejs:{\n                                    version:'3'\n                                },\n                                taegets:{\n                                    chrome:\"60\"\n                                }\n                            ]\n                        ]\n                    }\n                }\n            ]\n        }\n    ]\n}<\/code><\/pre>\n\n\n\n
              \n\n\n\n
              6. externals (CDN\u6253\u5305\u4f18\u5316)<\/h2>\n\n\n\n
              \u4f7f\u7528\u573a\u666f: \u672c\u5730\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93,\u6253\u5305\u65f6\u60f3\u4f7f\u7528CDN\u7684\u65b9\u5f0f,\u51cf\u5c11\u672c\u5730\u4ee3\u7801\u6253\u5305\u4f53\u79ef<\/p>\n\n\n\n
              \u914d\u7f6e webpackconfig.js<\/p>\n\n\n\n
              externals:{\n    jquery:\"$\"\n}<\/code><\/pre>\n\n\n\n
              \u4e0a\u9762\u7684 externals \u4e2d\u7684 key \u6307\u8868\u793a\u5f15\u5165\u5e93\u7684\u540d\u79f0 , value \u8868\u793a\u66b4\u9732\u7684\u53d8\u91cf\u540d\u79f0, \u4f8b\u5982: import $ from “jquery” \u4e2d [key]<\/strong> \u5bf9\u5e94\u7684 jquery<\/strong> \u800c [value]<\/strong> \u5bf9\u5e94\u7684 “$”<\/strong><\/p>\n\n\n\n
              \n\n\n\n
              7. webpack dll (\u52a8\u6001\u94fe\u63a5\u5e93)<\/h2>\n\n\n\n
              \u901a\u4fd7\u6613\u61c2\u7684\u7406\u89e3\u662f \u5c06\u6307\u5b9a\u7684\u7b2c\u4e09\u65b9\u5e93\u5355\u72ec\u6253\u5305<\/p>\n\n\n\n
              \u6d41\u7a0b:<\/p>\n\n\n\n
              1. \u521b\u5efa webpack.dll.js \u6587\u4ef6\u7528\u6765\u914d\u7f6e\u9700\u8981\u5355\u72ec\u6253\u5305\u7684\u7b2c\u4e09\u65b9\u5e93<\/li>
              2. \u8fd0\u884c webpack -config webpack.dll.js \u4f1a\u751f\u6210\u6253\u5305\u597d\u7684\u5e93,\u5e76\u521b\u5efa\u4e00\u4e2amanifsets.json \u6587\u4ef6, \u7528\u6765\u5c06\u6620\u5c04\u5355\u72ec\u6253\u5305\u7684\u5e93\u7684\u4fe1\u606f<\/li>
              3. \u914d\u7f6e webpack.config.js ,\u901a\u8fc7 manifsets.json \u7684\u6620\u5c04\u4fe1\u606f, \u5ffd\u7565\u9879\u76ee\u7f16\u8bd1\u5bf9\u6307\u5b9a\u5e93\u7684\u7f16\u8bd1, \u5e76\u5c06\u5355\u72ec\u7684\u7b2c\u4e09\u65b9\u5305\u81ea\u52a8\u5f15\u5165\u5230html\u4e2d<\/li><\/ol>\n\n\n\n
                \u914d\u7f6e webpack.dll.js<\/p>\n\n\n\n
                const {resolve} = require(\"path\");\nmodule.exports {\n    entry:{\n        jquery:[\"jquery\"], \/\/ key \u662f\u7ec8\u751f\u6210\u7684name \uff1b value \u8981\u6253\u5305\u7684\u5e93\u662fJquery\n    },\n    output:{\n        filename:\"[name].js\",\n           path:resolve(__dirname,\"dll\"),\n        library:'[name]_[hash].js' \/\/ \u6253\u5305\u51fa\u6765\u7684\u5e93\u5bf9\u5916\u66b4\u9732\u5185\u5bb9\u540d\u5b57\n    },\n    plugins:[\n        \/\/ \u6253\u5305\u751f\u6210\u4e00\u4e2a manifsets.json, \u63d0\u4f9bjquery\u7684\u6620\u5c04\n        new webpack.DllPlugin({\n            name:'[name]_[hash]', \/\/ \u6620\u5c04\u7684\u66b4\u9732\u5185\u5bb9\u7684\u540d\u5b57\n            path:resolve(__dirname,\"dll\/manifsets.json\") \/\/ \u8f93\u51fa\u7684\u6587\u4ef6\u8def\u5f84\n        })\n    ],\n    mode:\"production\"\n}<\/code><\/pre>\n\n\n\n
                \u5b89\u88c5\u4f9d\u8d56<\/p>\n\n\n\n
                yarn add add-asset-html-webpack-plugin -D<\/code><\/pre>\n\n\n\n
                \u914d\u7f6e webpack.config.js<\/p>\n\n\n\n
                plugin:[\n    \/\/ \u68c0\u7d22 manifest \u6587\u4ef6,\u8bc6\u522b\u4e0d\u80fd\u6253\u5305\u7684\u5e93\n    new webpack.DllReferencePlugin({\n        manifest:resolve(__dirname,\"dll\/manifest.json\")\n    })\n    \/\/ \u5c06\u67d0\u4e2a\u6587\u4ef6\u6253\u5305\u8f93\u51fa,\u5e76\u5728html\u4e2d\u81ea\u52a8\u5f15\u5165\u8d44\u6e90\n    new AddAssetHtmlWebpackPlugin({\n        filepath:resolve(__dirname,\"dll\/jquery.js\"),\n        publicPath:\".\/\" \/\/ \u914d\u7f6e html \u5f15\u5165\u7684\u6587\u4ef6\u4e3a\u76f8\u5bf9\u8def\u5f84\n    })\n]<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
                tree shaking (\u6447\u6811\u4f18\u5316) \u5206\u5272\u6253\u5305 webpack \u61d2\u52a0\u8f7d\u548c\u9884\u52a0\u8f7d PWA \u6e10\u8fdb\u5f0f\u7f51\u7edc\u5f00\u53d1\u5e94\u7528\u7a0b […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[54],"tags":[],"class_list":["post-473","post","type-post","status-publish","format-standard","hentry","category-webpack5"],"_links":{"self":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts\/473","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=473"}],"version-history":[{"count":2,"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts\/473\/revisions"}],"predecessor-version":[{"id":475,"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts\/473\/revisions\/475"}],"wp:attachment":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=473"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=473"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=473"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}