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           '",[1558,1870,1871],{"class":1586},"...",[1558,1873,1583],{"class":1572},[1558,1875,1717],{"class":1572},[1558,1877,1878],{"class":1720}," // 继承默认的 JS 压缩插件\n",[1558,1880,1881,1883,1886,1889],{"class":1560,"line":1673},[1558,1882,1676],{"class":1572},[1558,1884,1885],{"class":1576}," CssMinimizerPlugin",[1558,1887,1888],{"class":1568},"()",[1558,1890,1635],{"class":1572},[1558,1892,1893,1895],{"class":1560,"line":1687},[1558,1894,1749],{"class":1568},[1558,1896,1635],{"class":1572},[1558,1898,1899],{"class":1560,"line":1697},[1558,1900,1757],{"class":1572},[1558,1902,1903],{"class":1560,"line":1707},[1558,1904,1763],{"class":1572},[1765,1906,1907],{},[1530,1908,1909,1910,1913],{},"记得加上 ",[1544,1911,1912],{},"'...'"," 来保留 webpack 默认的 JS 压缩，否则只有 CSS 会被压缩。",[1534,1915],{},[1525,1917,1919],{"id":1918},"提取-css-为独立文件minicssextractplugin","🎨 提取 CSS 为独立文件（MiniCssExtractPlugin）",[1530,1921,1922,1923,1925],{},"默认情况下，CSS 会被打包进 JS 文件，加载效率不高，且不利于缓存。用 ",[1544,1924,1792],{}," 可以把 CSS 抽离成独立文件，浏览器可以并行加载。",[1549,1927,1929],{"className":1551,"code":1928,"language":1553,"meta":1554,"style":1554},"const MiniCssExtractPlugin = require('mini-css-extract-plugin');\n\nmodule.exports = {\n    module: {\n        rules: [\n            {\n                test: /\\.css$/i,\n                use: [\n                    MiniCssExtractPlugin.loader, // 抽离 CSS\n                    'css-loader',\n                ],\n            },\n        ],\n    },\n    plugins: [\n        new MiniCssExtractPlugin({\n            filename: '[name].[contenthash].css', // 增加内容哈希，方便缓存\n        }),\n    ],\n};\n",[1544,1930,1931,1955,1959,1967,1976,1985,1990,2019,2028,2044,2056,2063,2068,2074,2078,2087,2099,2118,2128,2136],{"__ignoreMap":1554},[1558,1932,1933,1935,1938,1940,1942,1944,1946,1949,1951,1953],{"class":1560,"line":1561},[1558,1934,1565],{"class":1564},[1558,1936,1937],{"class":1568}," MiniCssExtractPlugin ",[1558,1939,1573],{"class":1572},[1558,1941,1577],{"class":1576},[1558,1943,1580],{"class":1568},[1558,1945,1583],{"class":1572},[1558,1947,1948],{"class":1586},"mini-css-extract-plugin",[1558,1950,1583],{"class":1572},[1558,1952,1592],{"class":1568},[1558,1954,1595],{"class":1572},[1558,1956,1957],{"class":1560,"line":1598},[1558,1958,1602],{"emptyLinePlaceholder":1601},[1558,1960,1961,1963,1965],{"class":1560,"line":1605},[1558,1962,1608],{"class":1572},[1558,1964,1611],{"class":1572},[1558,1966,1614],{"class":1572},[1558,1968,1969,1972,1974],{"class":1560,"line":1617},[1558,1970,1971],{"class":1620},"    module",[1558,1973,1624],{"class":1572},[1558,1975,1614],{"class":1572},[1558,1977,1978,1981,1983],{"class":1560,"line":1638},[1558,1979,1980],{"class":1620},"        rules",[1558,1982,1624],{"class":1572},[1558,1984,1670],{"class":1568},[1558,1986,1987],{"class":1560,"line":1648},[1558,1988,1989],{"class":1572},"            {\n",[1558,1991,1992,1995,1997,2000,2003,2006,2010,2013,2017],{"class":1560,"line":1662},[1558,1993,1994],{"class":1620},"                test",[1558,1996,1624],{"class":1572},[1558,1998,1999],{"class":1572}," /",[1558,2001,2002],{"class":1568},"\\.",[1558,2004,2005],{"class":1586},"css",[1558,2007,2009],{"class":2008},"s8pZq","$",[1558,2011,2012],{"class":1572},"/",[1558,2014,2016],{"class":2015},"smPcV","i",[1558,2018,1635],{"class":1572},[1558,2020,2021,2024,2026],{"class":1560,"line":1673},[1558,2022,2023],{"class":1620},"                use",[1558,2025,1624],{"class":1572},[1558,2027,1670],{"class":1568},[1558,2029,2030,2033,2036,2039,2041],{"class":1560,"line":1687},[1558,2031,2032],{"class":1568},"                    MiniCssExtractPlugin",[1558,2034,2035],{"class":1572},".",[1558,2037,2038],{"class":1568},"loader",[1558,2040,1717],{"class":1572},[1558,2042,2043],{"class":1720}," // 抽离 CSS\n",[1558,2045,2046,2049,2052,2054],{"class":1560,"line":1697},[1558,2047,2048],{"class":1572},"                    '",[1558,2050,2051],{"class":1586},"css-loader",[1558,2053,1583],{"class":1572},[1558,2055,1635],{"class":1572},[1558,2057,2058,2061],{"class":1560,"line":1707},[1558,2059,2060],{"class":1568},"                ]",[1558,2062,1635],{"class":1572},[1558,2064,2065],{"class":1560,"line":1724},[1558,2066,2067],{"class":1572},"            },\n",[1558,2069,2070,2072],{"class":1560,"line":1730},[1558,2071,1749],{"class":1568},[1558,2073,1635],{"class":1572},[1558,2075,2076],{"class":1560,"line":1736},[1558,2077,1757],{"class":1572},[1558,2079,2080,2083,2085],{"class":1560,"line":1746},[1558,2081,2082],{"class":1620},"    plugins",[1558,2084,1624],{"class":1572},[1558,2086,1670],{"class":1568},[1558,2088,2089,2092,2095,2097],{"class":1560,"line":1754},[1558,2090,2091],{"class":1572},"        new",[1558,2093,2094],{"class":1576}," MiniCssExtractPlugin",[1558,2096,1580],{"class":1568},[1558,2098,1684],{"class":1572},[1558,2100,2101,2104,2106,2108,2111,2113,2115],{"class":1560,"line":1760},[1558,2102,2103],{"class":1620},"            filename",[1558,2105,1624],{"class":1572},[1558,2107,1627],{"class":1572},[1558,2109,2110],{"class":1586},"[name].[contenthash].css",[1558,2112,1583],{"class":1572},[1558,2114,1717],{"class":1572},[1558,2116,2117],{"class":1720}," // 增加内容哈希，方便缓存\n",[1558,2119,2121,2124,2126],{"class":1560,"line":2120},18,[1558,2122,2123],{"class":1572},"        }",[1558,2125,1592],{"class":1568},[1558,2127,1635],{"class":1572},[1558,2129,2131,2134],{"class":1560,"line":2130},19,[1558,2132,2133],{"class":1568},"    ]",[1558,2135,1635],{"class":1572},[1558,2137,2139],{"class":1560,"line":2138},20,[1558,2140,1763],{"class":1572},[1765,2142,2143],{},[1530,2144,2145,2146,2149],{},"生产环境建议使用内容哈希 ",[1544,2147,2148],{},"[contenthash]","，避免文件名重复导致浏览器缓存失效。",[1534,2151],{},[1525,2153,2155],{"id":2154},"设置环境变量defineplugin-env-文件cross-env","🌿 设置环境变量（DefinePlugin, .env 文件、cross-env）",[1530,2157,2158,2159,2162,2163,2166,2167,2170],{},"前端项目通常需要根据环境加载不同配置。webpack 通过 ",[1544,2160,2161],{},"DefinePlugin"," 注入环境变量，同时可以配合 ",[1544,2164,2165],{},".env"," 文件和 ",[1544,2168,2169],{},"cross-env"," 脚本实现跨平台的环境设置。",[2172,2173,2175,2176],"h3",{"id":2174},"_1-使用-defineplugin","1. 使用 ",[1544,2177,2161],{},[1549,2179,2181],{"className":1551,"code":2180,"language":1553,"meta":1554,"style":1554},"const webpack = require('webpack');\n\nmodule.exports = {\n    plugins: [\n        new webpack.DefinePlugin({\n            'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV),\n            'process.env.API_URL': JSON.stringify(process.env.API_URL),\n        }),\n    ],\n};\n",[1544,2182,2183,2207,2211,2219,2227,2242,2276,2306,2314,2320],{"__ignoreMap":1554},[1558,2184,2185,2187,2190,2192,2194,2196,2198,2201,2203,2205],{"class":1560,"line":1561},[1558,2186,1565],{"class":1564},[1558,2188,2189],{"class":1568}," webpack ",[1558,2191,1573],{"class":1572},[1558,2193,1577],{"class":1576},[1558,2195,1580],{"class":1568},[1558,2197,1583],{"class":1572},[1558,2199,2200],{"class":1586},"webpack",[1558,2202,1583],{"class":1572},[1558,2204,1592],{"class":1568},[1558,2206,1595],{"class":1572},[1558,2208,2209],{"class":1560,"line":1598},[1558,2210,1602],{"emptyLinePlaceholder":1601},[1558,2212,2213,2215,2217],{"class":1560,"line":1605},[1558,2214,1608],{"class":1572},[1558,2216,1611],{"class":1572},[1558,2218,1614],{"class":1572},[1558,2220,2221,2223,2225],{"class":1560,"line":1617},[1558,2222,2082],{"class":1620},[1558,2224,1624],{"class":1572},[1558,2226,1670],{"class":1568},[1558,2228,2229,2231,2234,2236,2238,2240],{"class":1560,"line":1638},[1558,2230,2091],{"class":1572},[1558,2232,2233],{"class":1568}," webpack",[1558,2235,2035],{"class":1572},[1558,2237,2161],{"class":1576},[1558,2239,1580],{"class":1568},[1558,2241,1684],{"class":1572},[1558,2243,2244,2246,2249,2251,2253,2256,2258,2261,2264,2266,2269,2271,2274],{"class":1560,"line":1648},[1558,2245,1868],{"class":1572},[1558,2247,2248],{"class":1620},"process.env.NODE_ENV",[1558,2250,1583],{"class":1572},[1558,2252,1624],{"class":1572},[1558,2254,2255],{"class":1568}," JSON",[1558,2257,2035],{"class":1572},[1558,2259,2260],{"class":1576},"stringify",[1558,2262,2263],{"class":1568},"(process",[1558,2265,2035],{"class":1572},[1558,2267,2268],{"class":1568},"env",[1558,2270,2035],{"class":1572},[1558,2272,2273],{"class":1568},"NODE_ENV)",[1558,2275,1635],{"class":1572},[1558,2277,2278,2280,2283,2285,2287,2289,2291,2293,2295,2297,2299,2301,2304],{"class":1560,"line":1662},[1558,2279,1868],{"class":1572},[1558,2281,2282],{"class":1620},"process.env.API_URL",[1558,2284,1583],{"class":1572},[1558,2286,1624],{"class":1572},[1558,2288,2255],{"class":1568},[1558,2290,2035],{"class":1572},[1558,2292,2260],{"class":1576},[1558,2294,2263],{"class":1568},[1558,2296,2035],{"class":1572},[1558,2298,2268],{"class":1568},[1558,2300,2035],{"class":1572},[1558,2302,2303],{"class":1568},"API_URL)",[1558,2305,1635],{"class":1572},[1558,2307,2308,2310,2312],{"class":1560,"line":1673},[1558,2309,2123],{"class":1572},[1558,2311,1592],{"class":1568},[1558,2313,1635],{"class":1572},[1558,2315,2316,2318],{"class":1560,"line":1687},[1558,2317,2133],{"class":1568},[1558,2319,1635],{"class":1572},[1558,2321,2322],{"class":1560,"line":1697},[1558,2323,1763],{"class":1572},[2172,2325,2327,2328,2330],{"id":2326},"_2-通过-env-文件管理变量","2. 通过 ",[1544,2329,2165],{}," 文件管理变量",[1530,2332,2333,2334,2337,2338,2341],{},"在项目根目录创建 ",[1544,2335,2336],{},".env.production"," 和 ",[1544,2339,2340],{},".env.development"," 文件，写入不同环境变量。",[1549,2343,2346],{"className":2344,"code":2345,"language":2268,"meta":1554,"style":1554},"language-env shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","# .env.production\nAPI_URL=https://api.example.com\n",[1544,2347,2348,2353],{"__ignoreMap":1554},[1558,2349,2350],{"class":1560,"line":1561},[1558,2351,2352],{},"# .env.production\n",[1558,2354,2355],{"class":1560,"line":1598},[1558,2356,2357],{},"API_URL=https://api.example.com\n",[2172,2359,2361,2362,2364],{"id":2360},"_3-使用-cross-env-实现跨平台设置","3. 使用 ",[1544,2363,2169],{}," 实现跨平台设置",[1530,2366,2367,2368,2371],{},"在 ",[1544,2369,2370],{},"package.json"," 脚本中：",[1549,2373,2377],{"className":2374,"code":2375,"language":2376,"meta":1554,"style":1554},"language-json shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","\"scripts\": {\n  \"build:prod\": \"cross-env NODE_ENV=production webpack --config webpack.prod.js\",\n  \"build:dev\": \"cross-env NODE_ENV=development webpack --config webpack.dev.js\"\n}\n","json",[1544,2378,2379,2394,2416,2435],{"__ignoreMap":1554},[1558,2380,2381,2384,2387,2389,2392],{"class":1560,"line":1561},[1558,2382,2383],{"class":1572},"\"",[1558,2385,2386],{"class":1586},"scripts",[1558,2388,2383],{"class":1572},[1558,2390,2391],{"class":1568},": ",[1558,2393,1684],{"class":1572},[1558,2395,2396,2399,2402,2404,2406,2409,2412,2414],{"class":1560,"line":1598},[1558,2397,2398],{"class":1572},"  \"",[1558,2400,2401],{"class":1564},"build:prod",[1558,2403,2383],{"class":1572},[1558,2405,1624],{"class":1572},[1558,2407,2408],{"class":1572}," \"",[1558,2410,2411],{"class":1586},"cross-env NODE_ENV=production webpack --config webpack.prod.js",[1558,2413,2383],{"class":1572},[1558,2415,1635],{"class":1572},[1558,2417,2418,2420,2423,2425,2427,2429,2432],{"class":1560,"line":1605},[1558,2419,2398],{"class":1572},[1558,2421,2422],{"class":1564},"build:dev",[1558,2424,2383],{"class":1572},[1558,2426,1624],{"class":1572},[1558,2428,2408],{"class":1572},[1558,2430,2431],{"class":1586},"cross-env NODE_ENV=development webpack --config webpack.dev.js",[1558,2433,2434],{"class":1572},"\"\n",[1558,2436,2437],{"class":1560,"line":1617},[1558,2438,2439],{"class":1572},"}\n",[1765,2441,2442],{},[1530,2443,2444,2446],{},[1544,2445,2169],{}," 让你不用关心 Windows 和 Linux/macOS 的环境变量写法差异，非常方便。",[1534,2448],{},[1525,2450,2452],{"id":2451},"构建多环境配置webpackprodjs-webpackdevjs","🌍 构建多环境配置（webpack.prod.js, webpack.dev.js）",[1530,2454,2455,2456,2337,2459,2462,2463,2466],{},"为了区分开发和生产环境，常见做法是拆分配置文件，具体到 ",[1544,2457,2458],{},"webpack.prod.js",[1544,2460,2461],{},"webpack.dev.js","，然后用 ",[1544,2464,2465],{},"webpack-merge"," 进行合并。",[1549,2468,2473],{"className":2469,"code":2470,"filename":2471,"language":2472,"meta":1554,"style":1554},"language-js shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","module.exports = {\n    entry: './src/index.js',\n    module: {\n        /* 公共 Loader */\n    },\n    plugins: [\n        /* 公共插件 */\n    ],\n};\n","webpack.common.js","js",[1544,2474,2475,2483,2499,2507,2512,2516,2524,2529,2535],{"__ignoreMap":1554},[1558,2476,2477,2479,2481],{"class":1560,"line":1561},[1558,2478,1608],{"class":1572},[1558,2480,1611],{"class":1572},[1558,2482,1614],{"class":1572},[1558,2484,2485,2488,2490,2492,2495,2497],{"class":1560,"line":1598},[1558,2486,2487],{"class":1620},"    entry",[1558,2489,1624],{"class":1572},[1558,2491,1627],{"class":1572},[1558,2493,2494],{"class":1586},"./src/index.js",[1558,2496,1583],{"class":1572},[1558,2498,1635],{"class":1572},[1558,2500,2501,2503,2505],{"class":1560,"line":1605},[1558,2502,1971],{"class":1620},[1558,2504,1624],{"class":1572},[1558,2506,1614],{"class":1572},[1558,2508,2509],{"class":1560,"line":1617},[1558,2510,2511],{"class":1720},"        /* 公共 Loader */\n",[1558,2513,2514],{"class":1560,"line":1638},[1558,2515,1757],{"class":1572},[1558,2517,2518,2520,2522],{"class":1560,"line":1648},[1558,2519,2082],{"class":1620},[1558,2521,1624],{"class":1572},[1558,2523,1670],{"class":1568},[1558,2525,2526],{"class":1560,"line":1662},[1558,2527,2528],{"class":1720},"        /* 公共插件 */\n",[1558,2530,2531,2533],{"class":1560,"line":1673},[1558,2532,2133],{"class":1568},[1558,2534,1635],{"class":1572},[1558,2536,2537],{"class":1560,"line":1687},[1558,2538,1763],{"class":1572},[1549,2540,2542],{"className":2469,"code":2541,"filename":2458,"language":2472,"meta":1554,"style":1554},"const { merge } = require('webpack-merge');\nconst common = require('./webpack.common.js');\nconst MiniCssExtractPlugin = require('mini-css-extract-plugin');\nconst CssMinimizerPlugin = require('css-minimizer-webpack-plugin');\nconst TerserPlugin = require('terser-webpack-plugin');\n\nmodule.exports = merge(common, {\n    mode: 'production',\n    module: {\n        rules: [\n            {\n                test: /\\.css$/i,\n                use: [MiniCssExtractPlugin.loader, 'css-loader'],\n            },\n        ],\n    },\n    plugins: [new MiniCssExtractPlugin({ filename: '[name].[contenthash].css' })],\n    optimization: {\n        minimize: true,\n        minimizer: [new TerserPlugin(), new CssMinimizerPlugin()],\n    },\n});\n",[1544,2543,2544,2573,2597,2619,2641,2663,2667,2683,2697,2705,2713,2717,2737,2763,2767,2773,2777,2815,2823,2833,2859,2864],{"__ignoreMap":1554},[1558,2545,2546,2548,2551,2554,2557,2559,2561,2563,2565,2567,2569,2571],{"class":1560,"line":1561},[1558,2547,1565],{"class":1564},[1558,2549,2550],{"class":1572}," {",[1558,2552,2553],{"class":1568}," merge ",[1558,2555,2556],{"class":1572},"}",[1558,2558,1611],{"class":1572},[1558,2560,1577],{"class":1576},[1558,2562,1580],{"class":1568},[1558,2564,1583],{"class":1572},[1558,2566,2465],{"class":1586},[1558,2568,1583],{"class":1572},[1558,2570,1592],{"class":1568},[1558,2572,1595],{"class":1572},[1558,2574,2575,2577,2580,2582,2584,2586,2588,2591,2593,2595],{"class":1560,"line":1598},[1558,2576,1565],{"class":1564},[1558,2578,2579],{"class":1568}," common ",[1558,2581,1573],{"class":1572},[1558,2583,1577],{"class":1576},[1558,2585,1580],{"class":1568},[1558,2587,1583],{"class":1572},[1558,2589,2590],{"class":1586},"./webpack.common.js",[1558,2592,1583],{"class":1572},[1558,2594,1592],{"class":1568},[1558,2596,1595],{"class":1572},[1558,2598,2599,2601,2603,2605,2607,2609,2611,2613,2615,2617],{"class":1560,"line":1605},[1558,2600,1565],{"class":1564},[1558,2602,1937],{"class":1568},[1558,2604,1573],{"class":1572},[1558,2606,1577],{"class":1576},[1558,2608,1580],{"class":1568},[1558,2610,1583],{"class":1572},[1558,2612,1948],{"class":1586},[1558,2614,1583],{"class":1572},[1558,2616,1592],{"class":1568},[1558,2618,1595],{"class":1572},[1558,2620,2621,2623,2625,2627,2629,2631,2633,2635,2637,2639],{"class":1560,"line":1617},[1558,2622,1565],{"class":1564},[1558,2624,1805],{"class":1568},[1558,2626,1573],{"class":1572},[1558,2628,1577],{"class":1576},[1558,2630,1580],{"class":1568},[1558,2632,1583],{"class":1572},[1558,2634,1788],{"class":1586},[1558,2636,1583],{"class":1572},[1558,2638,1592],{"class":1568},[1558,2640,1595],{"class":1572},[1558,2642,2643,2645,2647,2649,2651,2653,2655,2657,2659,2661],{"class":1560,"line":1638},[1558,2644,1565],{"class":1564},[1558,2646,1569],{"class":1568},[1558,2648,1573],{"class":1572},[1558,2650,1577],{"class":1576},[1558,2652,1580],{"class":1568},[1558,2654,1583],{"class":1572},[1558,2656,1587],{"class":1586},[1558,2658,1583],{"class":1572},[1558,2660,1592],{"class":1568},[1558,2662,1595],{"class":1572},[1558,2664,2665],{"class":1560,"line":1648},[1558,2666,1602],{"emptyLinePlaceholder":1601},[1558,2668,2669,2671,2673,2676,2679,2681],{"class":1560,"line":1662},[1558,2670,1608],{"class":1572},[1558,2672,1611],{"class":1572},[1558,2674,2675],{"class":1576}," merge",[1558,2677,2678],{"class":1568},"(common",[1558,2680,1717],{"class":1572},[1558,2682,1614],{"class":1572},[1558,2684,2685,2687,2689,2691,2693,2695],{"class":1560,"line":1673},[1558,2686,1621],{"class":1620},[1558,2688,1624],{"class":1572},[1558,2690,1627],{"class":1572},[1558,2692,1630],{"class":1586},[1558,2694,1583],{"class":1572},[1558,2696,1635],{"class":1572},[1558,2698,2699,2701,2703],{"class":1560,"line":1687},[1558,2700,1971],{"class":1620},[1558,2702,1624],{"class":1572},[1558,2704,1614],{"class":1572},[1558,2706,2707,2709,2711],{"class":1560,"line":1697},[1558,2708,1980],{"class":1620},[1558,2710,1624],{"class":1572},[1558,2712,1670],{"class":1568},[1558,2714,2715],{"class":1560,"line":1707},[1558,2716,1989],{"class":1572},[1558,2718,2719,2721,2723,2725,2727,2729,2731,2733,2735],{"class":1560,"line":1724},[1558,2720,1994],{"class":1620},[1558,2722,1624],{"class":1572},[1558,2724,1999],{"class":1572},[1558,2726,2002],{"class":1568},[1558,2728,2005],{"class":1586},[1558,2730,2009],{"class":2008},[1558,2732,2012],{"class":1572},[1558,2734,2016],{"class":2015},[1558,2736,1635],{"class":1572},[1558,2738,2739,2741,2743,2746,2748,2750,2752,2754,2756,2758,2761],{"class":1560,"line":1730},[1558,2740,2023],{"class":1620},[1558,2742,1624],{"class":1572},[1558,2744,2745],{"class":1568}," [MiniCssExtractPlugin",[1558,2747,2035],{"class":1572},[1558,2749,2038],{"class":1568},[1558,2751,1717],{"class":1572},[1558,2753,1627],{"class":1572},[1558,2755,2051],{"class":1586},[1558,2757,1583],{"class":1572},[1558,2759,2760],{"class":1568},"]",[1558,2762,1635],{"class":1572},[1558,2764,2765],{"class":1560,"line":1736},[1558,2766,2067],{"class":1572},[1558,2768,2769,2771],{"class":1560,"line":1746},[1558,2770,1749],{"class":1568},[1558,2772,1635],{"class":1572},[1558,2774,2775],{"class":1560,"line":1754},[1558,2776,1757],{"class":1572},[1558,2778,2779,2781,2783,2786,2789,2791,2793,2796,2799,2801,2803,2805,2807,2810,2813],{"class":1560,"line":1760},[1558,2780,2082],{"class":1620},[1558,2782,1624],{"class":1572},[1558,2784,2785],{"class":1568}," [",[1558,2787,2788],{"class":1572},"new",[1558,2790,2094],{"class":1576},[1558,2792,1580],{"class":1568},[1558,2794,2795],{"class":1572},"{",[1558,2797,2798],{"class":1620}," filename",[1558,2800,1624],{"class":1572},[1558,2802,1627],{"class":1572},[1558,2804,2110],{"class":1586},[1558,2806,1583],{"class":1572},[1558,2808,2809],{"class":1572}," }",[1558,2811,2812],{"class":1568},")]",[1558,2814,1635],{"class":1572},[1558,2816,2817,2819,2821],{"class":1560,"line":2120},[1558,2818,1641],{"class":1620},[1558,2820,1624],{"class":1572},[1558,2822,1614],{"class":1572},[1558,2824,2825,2827,2829,2831],{"class":1560,"line":2130},[1558,2826,1651],{"class":1620},[1558,2828,1624],{"class":1572},[1558,2830,1657],{"class":1656},[1558,2832,1635],{"class":1572},[1558,2834,2835,2837,2839,2841,2843,2845,2847,2849,2852,2854,2857],{"class":1560,"line":2138},[1558,2836,1665],{"class":1620},[1558,2838,1624],{"class":1572},[1558,2840,2785],{"class":1568},[1558,2842,2788],{"class":1572},[1558,2844,1679],{"class":1576},[1558,2846,1888],{"class":1568},[1558,2848,1717],{"class":1572},[1558,2850,2851],{"class":1572}," new",[1558,2853,1885],{"class":1576},[1558,2855,2856],{"class":1568},"()]",[1558,2858,1635],{"class":1572},[1558,2860,2862],{"class":1560,"line":2861},21,[1558,2863,1757],{"class":1572},[1558,2865,2867,2869,2871],{"class":1560,"line":2866},22,[1558,2868,2556],{"class":1572},[1558,2870,1592],{"class":1568},[1558,2872,1595],{"class":1572},[1765,2874,2875],{},[1530,2876,2877,2878,2881],{},"开发环境配置一般开启 ",[1544,2879,2880],{},"devtool","，热更新，避免压缩，方便调试。",[1534,2883],{},[1525,2885,2887],{"id":2886},"使用-webpack-bundle-analyzer-分析构建结果","📊 使用 Webpack Bundle Analyzer 分析构建结果",[1530,2889,2890,2891,2894],{},"构建完成后，了解打包文件体积分布非常重要，",[1544,2892,2893],{},"webpack-bundle-analyzer"," 可以帮你生成可视化报告。",[1549,2896,2898],{"className":1551,"code":2897,"language":1553,"meta":1554,"style":1554},"const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;\n\nmodule.exports = {\n    plugins: [\n        new BundleAnalyzerPlugin({\n            analyzerMode: 'static', // 生成静态 HTML 文件\n            openAnalyzer: false, // 不自动打开浏览器\n            reportFilename: 'bundle-report.html',\n        }),\n    ],\n};\n",[1544,2899,2900,2928,2932,2940,2948,2959,2978,2993,3009,3017,3023],{"__ignoreMap":1554},[1558,2901,2902,2904,2907,2909,2911,2913,2915,2917,2919,2921,2923,2926],{"class":1560,"line":1561},[1558,2903,1565],{"class":1564},[1558,2905,2906],{"class":1568}," BundleAnalyzerPlugin ",[1558,2908,1573],{"class":1572},[1558,2910,1577],{"class":1576},[1558,2912,1580],{"class":1568},[1558,2914,1583],{"class":1572},[1558,2916,2893],{"class":1586},[1558,2918,1583],{"class":1572},[1558,2920,1592],{"class":1568},[1558,2922,2035],{"class":1572},[1558,2924,2925],{"class":1568},"BundleAnalyzerPlugin",[1558,2927,1595],{"class":1572},[1558,2929,2930],{"class":1560,"line":1598},[1558,2931,1602],{"emptyLinePlaceholder":1601},[1558,2933,2934,2936,2938],{"class":1560,"line":1605},[1558,2935,1608],{"class":1572},[1558,2937,1611],{"class":1572},[1558,2939,1614],{"class":1572},[1558,2941,2942,2944,2946],{"class":1560,"line":1617},[1558,2943,2082],{"class":1620},[1558,2945,1624],{"class":1572},[1558,2947,1670],{"class":1568},[1558,2949,2950,2952,2955,2957],{"class":1560,"line":1638},[1558,2951,2091],{"class":1572},[1558,2953,2954],{"class":1576}," BundleAnalyzerPlugin",[1558,2956,1580],{"class":1568},[1558,2958,1684],{"class":1572},[1558,2960,2961,2964,2966,2968,2971,2973,2975],{"class":1560,"line":1648},[1558,2962,2963],{"class":1620},"            analyzerMode",[1558,2965,1624],{"class":1572},[1558,2967,1627],{"class":1572},[1558,2969,2970],{"class":1586},"static",[1558,2972,1583],{"class":1572},[1558,2974,1717],{"class":1572},[1558,2976,2977],{"class":1720}," // 生成静态 HTML 文件\n",[1558,2979,2980,2983,2985,2988,2990],{"class":1560,"line":1662},[1558,2981,2982],{"class":1620},"            openAnalyzer",[1558,2984,1624],{"class":1572},[1558,2986,2987],{"class":1656}," false",[1558,2989,1717],{"class":1572},[1558,2991,2992],{"class":1720}," // 不自动打开浏览器\n",[1558,2994,2995,2998,3000,3002,3005,3007],{"class":1560,"line":1673},[1558,2996,2997],{"class":1620},"            reportFilename",[1558,2999,1624],{"class":1572},[1558,3001,1627],{"class":1572},[1558,3003,3004],{"class":1586},"bundle-report.html",[1558,3006,1583],{"class":1572},[1558,3008,1635],{"class":1572},[1558,3010,3011,3013,3015],{"class":1560,"line":1687},[1558,3012,2123],{"class":1572},[1558,3014,1592],{"class":1568},[1558,3016,1635],{"class":1572},[1558,3018,3019,3021],{"class":1560,"line":1697},[1558,3020,2133],{"class":1568},[1558,3022,1635],{"class":1572},[1558,3024,3025],{"class":1560,"line":1707},[1558,3026,1763],{"class":1572},[1530,3028,3029,3030,3032],{},"运行构建后，打开 ",[1544,3031,3004],{},"，你能清晰看到每个模块的体积占比，方便进一步优化。",[1765,3034,3035],{},[1530,3036,3037],{},"体积大的包可以考虑使用按需加载、CDN 或替换为更轻量的库。",[1534,3039],{},[1525,3041,3043],{"id":3042},"小节总结","🧾 小节总结",[3045,3046,3047,3056,3062,3073,3082],"ul",{},[3048,3049,3050,3051,2337,3053,3055],"li",{},"配置 ",[1544,3052,1546],{},[1544,3054,1788],{},"，可压缩 JS 和 CSS，提高加载效率。",[3048,3057,3058,3059,3061],{},"使用 ",[1544,3060,1792],{}," 把 CSS 抽离成独立文件，利用浏览器缓存和并行加载优势。",[3048,3063,3064,3065,2337,3067,3069,3070,3072],{},"通过 ",[1544,3066,2161],{},[1544,3068,2165],{}," 文件结合 ",[1544,3071,2169],{},"，实现灵活的多环境变量管理。",[3048,3074,3075,3076,3078,3079,3081],{},"采用多环境配置文件，如 ",[1544,3077,2458],{}," 与 ",[1544,3080,2461],{},"，保证配置简洁、清晰。",[3048,3083,3058,3084,3086],{},[1544,3085,2893],{}," 生成可视化报告，帮助分析和优化包体积。",[1534,3088],{},[1525,3090,3092],{"id":3091},"知识问答qa","❓ 知识问答（Q&A）",[1530,3094,3095],{},"Q：为什么要把 CSS 提取成独立文件？",[1530,3097,3098],{},"A：CSS 独立文件可以被浏览器并行加载，提高页面渲染速度，还能更好地利用缓存，减少重复下载。",[1530,3100,3101,3102,2337,3104,3106],{},"Q：",[1544,3103,2161],{},[1544,3105,2165],{}," 有什么区别？",[1530,3108,3109,3110,3112,3113,3115,3116,3118,3119,3121],{},"A：",[1544,3111,2161],{}," 是 webpack 内置用来定义全局常量的插件，",[1544,3114,2165],{}," 文件是存储环境变量的文件，通常结合工具读取 ",[1544,3117,2165],{}," 并传给 ",[1544,3120,2161],{},"。",[1530,3123,3124],{},"Q：构建体积过大怎么办？",[1530,3126,3127,3128,3130],{},"A：可以用 ",[1544,3129,2893],{}," 先查看包体积分布，再采用代码拆分、按需加载等策略优化。",[1534,3132],{},[1525,3134,3136],{"id":3135},"小练习","🧪 小练习",[2172,3138,3140],{"id":3139},"练习一配置生产环境压缩","练习一：配置生产环境压缩",[1530,3142,3143],{},"请基于以下代码，实现生产环境下 JS 和 CSS 的压缩，并抽离 CSS。",[1549,3145,3147],{"className":1551,"code":3146,"language":1553,"meta":1554,"style":1554},"// webpack.prod.js\nconst { merge } = require('webpack-merge');\nconst common = require('./webpack.common.js');\n\nmodule.exports = merge(common, {\n    mode: 'production',\n    // 补充代码，实现 JS 和 CSS 压缩以及 CSS 抽离\n});\n",[1544,3148,3149,3154,3180,3202,3206,3220,3234,3239],{"__ignoreMap":1554},[1558,3150,3151],{"class":1560,"line":1561},[1558,3152,3153],{"class":1720},"// webpack.prod.js\n",[1558,3155,3156,3158,3160,3162,3164,3166,3168,3170,3172,3174,3176,3178],{"class":1560,"line":1598},[1558,3157,1565],{"class":1564},[1558,3159,2550],{"class":1572},[1558,3161,2553],{"class":1568},[1558,3163,2556],{"class":1572},[1558,3165,1611],{"class":1572},[1558,3167,1577],{"class":1576},[1558,3169,1580],{"class":1568},[1558,3171,1583],{"class":1572},[1558,3173,2465],{"class":1586},[1558,3175,1583],{"class":1572},[1558,3177,1592],{"class":1568},[1558,3179,1595],{"class":1572},[1558,3181,3182,3184,3186,3188,3190,3192,3194,3196,3198,3200],{"class":1560,"line":1605},[1558,3183,1565],{"class":1564},[1558,3185,2579],{"class":1568},[1558,3187,1573],{"class":1572},[1558,3189,1577],{"class":1576},[1558,3191,1580],{"class":1568},[1558,3193,1583],{"class":1572},[1558,3195,2590],{"class":1586},[1558,3197,1583],{"class":1572},[1558,3199,1592],{"class":1568},[1558,3201,1595],{"class":1572},[1558,3203,3204],{"class":1560,"line":1617},[1558,3205,1602],{"emptyLinePlaceholder":1601},[1558,3207,3208,3210,3212,3214,3216,3218],{"class":1560,"line":1638},[1558,3209,1608],{"class":1572},[1558,3211,1611],{"class":1572},[1558,3213,2675],{"class":1576},[1558,3215,2678],{"class":1568},[1558,3217,1717],{"class":1572},[1558,3219,1614],{"class":1572},[1558,3221,3222,3224,3226,3228,3230,3232],{"class":1560,"line":1648},[1558,3223,1621],{"class":1620},[1558,3225,1624],{"class":1572},[1558,3227,1627],{"class":1572},[1558,3229,1630],{"class":1586},[1558,3231,1583],{"class":1572},[1558,3233,1635],{"class":1572},[1558,3235,3236],{"class":1560,"line":1662},[1558,3237,3238],{"class":1720},"    // 补充代码，实现 JS 和 CSS 压缩以及 CSS 抽离\n",[1558,3240,3241,3243,3245],{"class":1560,"line":1673},[1558,3242,2556],{"class":1572},[1558,3244,1592],{"class":1568},[1558,3246,1595],{"class":1572},[2172,3248,3250],{"id":3249},"练习二多环境变量配置","练习二：多环境变量配置",[1530,3252,3253,3254,2337,3256,3258,3259,3121],{},"基于 ",[1544,3255,2161],{},[1544,3257,2165],{}," 文件，写出一个简单的生产环境配置，能让代码中访问 ",[1544,3260,2282],{},[1549,3262,3264],{"className":1551,"code":3263,"language":1553,"meta":1554,"style":1554},"// webpack.prod.js\nconst webpack = require('webpack');\n\nmodule.exports = {\n    // 补充代码，实现环境变量注入\n};\n",[1544,3265,3266,3270,3292,3296,3304,3309],{"__ignoreMap":1554},[1558,3267,3268],{"class":1560,"line":1561},[1558,3269,3153],{"class":1720},[1558,3271,3272,3274,3276,3278,3280,3282,3284,3286,3288,3290],{"class":1560,"line":1598},[1558,3273,1565],{"class":1564},[1558,3275,2189],{"class":1568},[1558,3277,1573],{"class":1572},[1558,3279,1577],{"class":1576},[1558,3281,1580],{"class":1568},[1558,3283,1583],{"class":1572},[1558,3285,2200],{"class":1586},[1558,3287,1583],{"class":1572},[1558,3289,1592],{"class":1568},[1558,3291,1595],{"class":1572},[1558,3293,3294],{"class":1560,"line":1605},[1558,3295,1602],{"emptyLinePlaceholder":1601},[1558,3297,3298,3300,3302],{"class":1560,"line":1617},[1558,3299,1608],{"class":1572},[1558,3301,1611],{"class":1572},[1558,3303,1614],{"class":1572},[1558,3305,3306],{"class":1560,"line":1638},[1558,3307,3308],{"class":1720},"    // 补充代码，实现环境变量注入\n",[1558,3310,3311],{"class":1560,"line":1648},[1558,3312,1763],{"class":1572},[1534,3314],{},[1530,3316,3317],{},"🎉 恭喜你已经掌握 webpack 生产环境构建中压缩、提取 CSS、多环境配置及构建分析的核心技能啦！继续保持实战练习，前端打包优化路上越走越顺！",[3319,3320,3321],"style",{},"html pre.shiki code .s50WR, html code.shiki .s50WR{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .sndM8, html code.shiki .sndM8{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .s86vT, html code.shiki .s86vT{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .swgpB, html code.shiki .swgpB{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .sIEYB, html code.shiki .sIEYB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .sd2Uz, html code.shiki .sd2Uz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sPKOg, html code.shiki .sPKOg{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html pre.shiki code .syuKq, html code.shiki .syuKq{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .s8pZq, html code.shiki .s8pZq{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .smPcV, html code.shiki .smPcV{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}",{"title":1554,"searchDepth":1598,"depth":1598,"links":3323},[3324,3325,3326,3327,3328,3336,3337,3338,3339,3340],{"id":1527,"depth":1598,"text":1528},{"id":1538,"depth":1598,"text":1539},{"id":1781,"depth":1598,"text":1782},{"id":1918,"depth":1598,"text":1919},{"id":2154,"depth":1598,"text":2155,"children":3329},[3330,3332,3334],{"id":2174,"depth":1605,"text":3331},"1. 使用 DefinePlugin",{"id":2326,"depth":1605,"text":3333},"2. 通过 .env 文件管理变量",{"id":2360,"depth":1605,"text":3335},"3. 使用 cross-env 实现跨平台设置",{"id":2451,"depth":1598,"text":2452},{"id":2886,"depth":1598,"text":2887},{"id":3042,"depth":1598,"text":3043},{"id":3091,"depth":1598,"text":3092},{"id":3135,"depth":1598,"text":3136,"children":3341},[3342,3343],{"id":3139,"depth":1605,"text":3140},{"id":3249,"depth":1605,"text":3250},"详细讲解如何使用 webpack 进行生产环境构建，包括代码压缩、提取独立 CSS 文件、环境变量配置、多环境管理及构建结果分析。","md",null,{},{"title":395},{"title":395,"description":3344},"ckVgbPys1O",[3352,3354],{"title":391,"path":392,"stem":393,"description":3353,"children":-1},"深入浅出讲解 webpack 代码分割、懒加载、Tree Shaking 及缓存优化，帮你显著提升构建速度和运行效率。",{"title":48,"path":399,"stem":400,"description":3355,"children":-1},"所有考核题目都是由博主亲自编写，考核内容来源于本门课程。",1784715107105]