{"id":3865,"date":"2026-11-14T17:54:25","date_gmt":"2026-11-14T08:54:25","guid":{"rendered":"https:\/\/qol-kk.com\/wp2\/?p=3865"},"modified":"2026-11-14T17:54:25","modified_gmt":"2026-11-14T08:54:25","slug":"20261024-00mvllu7","status":"publish","type":"post","link":"https:\/\/qol-kk.com\/wp2\/blog\/2026\/11\/14\/20261024-00mvllu7\/","title":{"rendered":"Sass\u3068PostCSS\u306e\u5171\u5b58\uff1aresolve-url-loader\u3067\u30d1\u30b9\u89e3\u6c7a\u306e\u843d\u3068\u3057\u7a74\u3092\u56de\u907f\u3059\u308b"},"content":{"rendered":"<h2>\u6982\u8981<\/h2>\n<p>webpack \u3067 Sass \u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3001\u3055\u3089\u306b PostCSS\uff08autoprefixer \u306a\u3069\uff09\u3092\u901a\u3059\u69cb\u6210\u306f\u4e00\u822c\u7684\u3060\u3002\u3068\u3053\u308d\u304c\u3053\u306e\u69cb\u6210\u3067\u3001SCSS \u306b\u66f8\u3044\u305f <code>url(...)<\/code> \u306e\u76f8\u5bfe\u30d1\u30b9\u304c\u672c\u756a\u30d3\u30eb\u30c9\u3067\u7a81\u7136 404 \u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308b\u3002\u539f\u56e0\u306f Sass \u304c <code>url()<\/code> \u306e\u4e2d\u8eab\u3092\u300c\u66f8\u3044\u305f\u5834\u6240\u300d\u3067\u306f\u306a\u304f\u300c\u51fa\u529b\u3055\u308c\u308b CSS \u306e\u4f4d\u7f6e\u300d\u3092\u57fa\u6e96\u306b\u89e3\u6c7a\u3057\u3066\u3057\u307e\u3046\u70b9\u306b\u3042\u308b\u3002\u672c\u8a18\u4e8b\u3067\u306f <code>resolve-url-loader<\/code> \u3092\u4f7f\u3063\u305f\u56de\u907f\u6cd5\u3068\u3001PostCSS \u3068\u5171\u5b58\u3055\u305b\u308b\u3068\u304d\u306e\u30ed\u30fc\u30c0\u30fc\u9806\u5e8f\u306e\u52d8\u6240\u3092\u307e\u3068\u3081\u308b\u3002<\/p>\n<h2>\u74b0\u5883<\/h2>\n<ul>\n<li>webpack 5<\/li>\n<li>sass-loader\uff08Dart Sass \/ <code>sass<\/code> \u30d1\u30c3\u30b1\u30fc\u30b8\uff09<\/li>\n<li>css-loader<\/li>\n<li>postcss-loader\uff08autoprefixer \u306a\u3069\uff09<\/li>\n<li>resolve-url-loader<\/li>\n<li>MiniCssExtractPlugin\uff08CSS \u62bd\u51fa\uff09<\/li>\n<\/ul>\n<h2>\u767a\u751f\u3057\u305f\u554f\u984c<\/h2>\n<p>SCSS \u3092\u30d1\u30fc\u30b7\u30e3\u30eb\u306b\u5206\u5272\u3057\u3001\u5404\u30d1\u30fc\u30b7\u30e3\u30eb\u306e\u96a3\u306b\u753b\u50cf\u3092\u7f6e\u3044\u3066\u76f8\u5bfe\u30d1\u30b9\u3067\u53c2\u7167\u3057\u3066\u3044\u305f\u3002<\/p>\n<pre class=\"lang:default decode:true\">src\/\n\u251c\u2500\u2500 styles\/\n\u2502   \u251c\u2500\u2500 main.scss\n\u2502   \u2514\u2500\u2500 components\/\n\u2502       \u251c\u2500\u2500 _hero.scss\n\u2502       \u2514\u2500\u2500 images\/\n\u2502           \u2514\u2500\u2500 bg.png<\/pre>\n<pre class=\"lang:default decode:true\">\/\/ src\/styles\/components\/_hero.scss\n.hero {\n  background-image: url(\".\/images\/bg.png\");\n}<\/pre>\n<pre class=\"lang:default decode:true\">\/\/ src\/styles\/main.scss\n@use \"components\/hero\";<\/pre>\n<p>\u958b\u767a\u4e2d\u306f\u898b\u3048\u3066\u3044\u305f\u80cc\u666f\u753b\u50cf\u304c\u3001\u30d3\u30eb\u30c9\u3059\u308b\u3068\u8aad\u307f\u8fbc\u3081\u306a\u3044\u3002\u751f\u6210\u3055\u308c\u305f CSS \u3092\u78ba\u8a8d\u3059\u308b\u3068\u3001<code>url()<\/code> \u306e\u30d1\u30b9\u304c <code>_hero.scss<\/code> \u304b\u3089\u898b\u305f\u76f8\u5bfe\u4f4d\u7f6e\u3067\u306f\u306a\u304f\u3001<code>main.scss<\/code>\uff08\uff1d\u51fa\u529b CSS\uff09\u304b\u3089\u898b\u305f\u4f4d\u7f6e\u3068\u3057\u3066\u6271\u308f\u308c\u3066\u3044\u305f\u3002<\/p>\n<h2>\u539f\u56e0<\/h2>\n<p>Sass \u306f <code>@use<\/code> \/ <code>@import<\/code> \u3067\u30d1\u30fc\u30b7\u30e3\u30eb\u3092\u53d6\u308a\u8fbc\u3080\u3068\u3001\u3059\u3079\u3066\u30921\u3064\u306e CSS \u306b\u307e\u3068\u3081\u3066\u51fa\u529b\u3059\u308b\u3002\u3053\u306e\u3068\u304d <code>url()<\/code> \u306e\u4e2d\u8eab\u306f <strong>\u66f8\u304d\u63db\u3048\u305a\u306b\u305d\u306e\u307e\u307e\u51fa\u529b\u3059\u308b<\/strong>\u3002<\/p>\n<p>\u7d50\u679c\u3068\u3057\u3066\u3001<code>url()<\/code> \u306e\u76f8\u5bfe\u30d1\u30b9\u306f\u300c\u5143\u306e <code>.scss<\/code> \u30d5\u30a1\u30a4\u30eb\u306e\u4f4d\u7f6e\u300d\u3067\u306f\u306a\u304f\u300c\u6700\u7d42\u7684\u306b\u751f\u6210\u3055\u308c\u308b CSS \u30d5\u30a1\u30a4\u30eb\u306e\u4f4d\u7f6e\u300d\u3092\u57fa\u6e96\u306b\u89e3\u6c7a\u3055\u308c\u308b\u3002\u30d1\u30fc\u30b7\u30e3\u30eb\u3068\u51fa\u529b CSS \u304c\u5225\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u3042\u308b\u3068\u3001\u3053\u3053\u3067\u30d1\u30b9\u304c\u305a\u308c\u308b\u3002Sass \u81ea\u4f53\u306f\u81ea\u5206\u304c\u3069\u3053\u306b\u51fa\u529b\u3055\u308c\u308b\u304b\u77e5\u3089\u306a\u3044\u305f\u3081\u610f\u56f3\u7684\u306b url \u3092\u66f8\u304d\u63db\u3048\u306a\u3044\u3002\u3053\u308c\u306f\u4ed5\u69d8\u3060\u3002<\/p>\n<h2>\u5bfe\u5fdc\u65b9\u6cd5<\/h2>\n<p><code>resolve-url-loader<\/code> \u3092\u5c0e\u5165\u3059\u308b\u3002\u3053\u306e\u30ed\u30fc\u30c0\u30fc\u306f Sass \u304c\u51fa\u529b\u3057\u305f CSS \u3068\u3001\u305d\u306e\u30bd\u30fc\u30b9\u30de\u30c3\u30d7\u3092\u898b\u3066\u3001<code>url()<\/code> \u304c\u5143\u3005\u3069\u306e <code>.scss<\/code> \u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304b\u308c\u3066\u3044\u305f\u304b\u3092\u7a81\u304d\u6b62\u3081\u3001\u51fa\u529b CSS \u306e\u4f4d\u7f6e\u3092\u57fa\u6e96\u306b\u3057\u305f\u6b63\u3057\u3044\u76f8\u5bfe\u30d1\u30b9\u3078\u66f8\u304d\u63db\u3048\u308b\u3002<\/p>\n<p>\u30dd\u30a4\u30f3\u30c8\u306f2\u3064\u3002<\/p>\n<ol>\n<li><code>resolve-url-loader<\/code> \u306f <strong>sass-loader \u306e\u76f4\u5f8c\uff08\u30ed\u30fc\u30c0\u30fc\u914d\u5217\u3067\u306f sass-loader \u306e\u76f4\u524d\uff09<\/strong> \u306b\u7f6e\u304f<\/li>\n<li><strong>sass-loader \u5074\u3067\u30bd\u30fc\u30b9\u30de\u30c3\u30d7\u3092\u5fc5\u305a\u6709\u52b9\u306b\u3059\u308b<\/strong>\uff08<code>sourceMap: true<\/code>\uff09\u3002\u3053\u308c\u304c\u7121\u3044\u3068\u5143\u30d5\u30a1\u30a4\u30eb\u3092\u7279\u5b9a\u3067\u304d\u305a\u6a5f\u80fd\u3057\u306a\u3044<\/li>\n<\/ol>\n<h2>\u5b9f\u88c5\u4f8b<\/h2>\n<p>webpack \u306e\u30ed\u30fc\u30c0\u30fc\u914d\u5217\u306f\u300c\u4e0b\u304b\u3089\u4e0a\u300d\u306b\u5b9f\u884c\u3055\u308c\u308b\u3002sass-loader \u304c\u6700\u521d\u306b\u8d70\u308a\u3001\u305d\u306e\u51fa\u529b\u3092 resolve-url-loader \u304c\u53d7\u3051\u53d6\u308a\u3001\u3055\u3089\u306b postcss-loader \u2192 css-loader \u3068\u6d41\u308c\u308b\u3002<\/p>\n<pre class=\"lang:default decode:true\">\/\/ webpack.config.js\nconst MiniCssExtractPlugin = require(\"mini-css-extract-plugin\");\n\nmodule.exports = {\n  module: {\n    rules: [\n      {\n        test: \/\\.scss$\/,\n        use: [\n          MiniCssExtractPlugin.loader,\n          {\n            loader: \"css-loader\",\n            options: { sourceMap: true },\n          },\n          {\n            loader: \"postcss-loader\",\n            options: { sourceMap: true },\n          },\n          {\n            \/\/ sass-loader \u306e\u51fa\u529b\u3092\u76f4\u63a5\u53d7\u3051\u53d6\u308b\u4f4d\u7f6e\u306b\u7f6e\u304f\n            loader: \"resolve-url-loader\",\n            options: { sourceMap: true },\n          },\n          {\n            loader: \"sass-loader\",\n            options: {\n              \/\/ resolve-url-loader \u304c\u5143\u30d5\u30a1\u30a4\u30eb\u3092\u7279\u5b9a\u3059\u308b\u306e\u306b\u5fc5\u9808\n              sourceMap: true,\n            },\n          },\n        ],\n      },\n    ],\n  },\n  plugins: [new MiniCssExtractPlugin()],\n};<\/pre>\n<p>PostCSS \u3068\u306e\u5171\u5b58\u3067\u91cd\u8981\u306a\u306e\u306f\u3001<strong>postcss-loader \u3092 resolve-url-loader \u3088\u308a\u4e0a\uff08css-loader \u5bc4\u308a\uff09\u306b\u7f6e\u304f<\/strong> \u3053\u3068\u3002resolve-url-loader \u306f sass-loader \u304c\u5410\u3044\u305f\u30bd\u30fc\u30b9\u30de\u30c3\u30d7\u3092\u983c\u308a\u306b\u5143\u30d5\u30a1\u30a4\u30eb\u3092\u8fbf\u308b\u305f\u3081\u3001\u305d\u306e\u9593\u306b\u5225\u306e\u5909\u63db\u3092\u631f\u3080\u3068\u30bd\u30fc\u30b9\u30de\u30c3\u30d7\u304c\u5d29\u308c\u3066\u30d1\u30b9\u89e3\u6c7a\u306b\u5931\u6557\u3059\u308b\u3053\u3068\u304c\u3042\u308b\u3002sass-loader \u2192 resolve-url-loader \u3092\u96a3\u63a5\u3055\u305b\u3001PostCSS \u5909\u63db\u306f\u305d\u306e\u5f8c\u306b\u304b\u3051\u308b\u306e\u304c\u5b89\u5168\u3060\u3002<\/p>\n<pre class=\"lang:default decode:true\">[\u5b9f\u884c\u9806]\nsass-loader\n  \u2192 resolve-url-loader   (\u3053\u3053\u3067 url() \u3092\u6b63\u3057\u3044\u76f8\u5bfe\u30d1\u30b9\u306b\u66f8\u304d\u63db\u3048)\n    \u2192 postcss-loader     (autoprefixer \u306a\u3069\u3092\u9069\u7528)\n      \u2192 css-loader\n        \u2192 MiniCssExtractPlugin.loader<\/pre>\n<h2>\u78ba\u8a8d\u65b9\u6cd5<\/h2>\n<ol>\n<li>\u30d3\u30eb\u30c9\u5f8c\u306b\u62bd\u51fa\u3055\u308c\u305f CSS \u3092\u958b\u304d\u3001<code>url(...)<\/code> \u304c\u51fa\u529b CSS \u306e\u4f4d\u7f6e\u3092\u57fa\u6e96\u306b\u3057\u305f\u6b63\u3057\u3044\u76f8\u5bfe\u30d1\u30b9\u3078\u66f8\u304d\u63db\u308f\u3063\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3059\u308b<\/li>\n<li>\u30d6\u30e9\u30a6\u30b6\u306e Network \u30bf\u30d6\u3067\u753b\u50cf\u30fb\u30d5\u30a9\u30f3\u30c8\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u304c 200 \u3067\u8fd4\u3063\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3059\u308b<\/li>\n<li>\u308f\u3056\u3068\u30d1\u30fc\u30b7\u30e3\u30eb\u3092\u5225\u968e\u5c64\u3078\u79fb\u52d5\u3057\u3001<code>resolve-url-loader<\/code> \u6709\u308a\uff0f\u7121\u3057\u3067\u51fa\u529b CSS \u306e <code>url()<\/code> \u304c\u3069\u3046\u5909\u308f\u308b\u304b\u898b\u6bd4\u3079\u308b\u3068\u6319\u52d5\u304c\u63b4\u307f\u3084\u3059\u3044<\/li>\n<\/ol>\n<h2>\u6ce8\u610f\u70b9<\/h2>\n<ul>\n<li><strong>\u30bd\u30fc\u30b9\u30de\u30c3\u30d7\u304c\u547d\u7db1<\/strong>\uff1asass-loader \u306e <code>sourceMap: true<\/code> \u3092\u5916\u3059\u3068\u9759\u304b\u306b\u58ca\u308c\u308b\u3002\u300c\u8a2d\u5b9a\u3057\u305f\u6c17\u304c\u3059\u308b\u306e\u306b\u52b9\u304b\u306a\u3044\u300d\u3068\u304d\u306f\u307e\u305a\u3053\u3053\u3092\u7591\u3046\u3002<\/li>\n<li><strong>\u52d5\u7684\u306a url \u306f\u89e3\u6c7a\u3067\u304d\u306a\u3044<\/strong>\uff1a<code>url(\"#{$var}\/bg.png\")<\/code> \u306e\u3088\u3046\u306a Sass \u5909\u6570\u3067\u7d44\u307f\u7acb\u3066\u305f url \u306f\u3001resolve-url-loader \u304c\u9759\u7684\u306b\u8fbf\u308c\u306a\u3044\u305f\u3081\u66f8\u304d\u63db\u3048\u5bfe\u8c61\u306b\u306a\u3089\u306a\u3044\u3002\u30d1\u30b9\u306f\u3067\u304d\u308b\u3060\u3051\u30ea\u30c6\u30e9\u30eb\u3067\u66f8\u304f\u3002<\/li>\n<li><strong>\u30ed\u30fc\u30c0\u30fc\u9806\u5e8f\u304c\u5168\u3066<\/strong>\uff1aresolve-url-loader \u3092 css-loader \u3088\u308a\u4e0a\u306b\u7f6e\u3044\u305f\u308a\u3001postcss-loader \u3092 sass-loader \u3068 resolve-url-loader \u306e\u9593\u306b\u5272\u308a\u8fbc\u307e\u305b\u308b\u3068\u6a5f\u80fd\u3057\u306a\u3044\u3002<\/li>\n<li><strong>\u7d76\u5bfe\u30d1\u30b9\u30fb\u30a8\u30a4\u30ea\u30a2\u30b9\u306f\u5bfe\u8c61\u5916<\/strong>\uff1a<code>~<\/code> \u59cb\u307e\u308a\u3084 webpack \u306e <code>resolve.alias<\/code> \u7d4c\u7531\u306e\u53c2\u7167\u306f css-loader \u306e\u9818\u5206\u3002resolve-url-loader \u304c\u9762\u5012\u3092\u898b\u308b\u306e\u306f\u76f8\u5bfe url\u3002<\/li>\n<\/ul>\n<h2>\u307e\u3068\u3081<\/h2>\n<ul>\n<li>Sass \u306f <code>url()<\/code> \u3092\u66f8\u304d\u63db\u3048\u305a\u3001\u30d1\u30fc\u30b7\u30e3\u30eb\u306e\u76f8\u5bfe\u30d1\u30b9\u306f\u300c\u51fa\u529b CSS \u306e\u4f4d\u7f6e\u300d\u57fa\u6e96\u3067\u89e3\u6c7a\u3055\u308c\u3066\u3057\u307e\u3046\u3002<\/li>\n<li><code>resolve-url-loader<\/code> \u3092 sass-loader \u306e\u76f4\u5f8c\u306b\u631f\u307f\u3001<strong>sass-loader \u306e\u30bd\u30fc\u30b9\u30de\u30c3\u30d7\u3092\u6709\u52b9\u5316<\/strong> \u3059\u308c\u3070\u3001\u5143\u30d5\u30a1\u30a4\u30eb\u57fa\u6e96\u306e\u6b63\u3057\u3044\u30d1\u30b9\u3078\u66f8\u304d\u63db\u308f\u308b\u3002<\/li>\n<li>PostCSS \u3068\u5171\u5b58\u3055\u305b\u308b\u3068\u304d\u306f <strong>sass-loader \u2192 resolve-url-loader \u3092\u96a3\u63a5<\/strong>\u3055\u305b\u3001postcss-loader \u306f\u305d\u306e\u5f8c\u6bb5\u306b\u7f6e\u304f\u3002<\/li>\n<li>\u52d5\u7684 url 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