我对webpack很陌生...... 我希望能够读取一个值，具体来说是从webpack.config.js文件中读取env的值，并在文件中使用不同的css样式来基于环境。
例如：
- env = development，color = green
- env = production，color = blue
到目前为止，我已经专注于sass-loader，试图传递数据，但没有成功，当我运行npm run build:Debug时（这会运行webpack --app=all --env=development），$ env变量总是未定义的。
这些是我拥有的文件:
webpack.config.js
const path = require("path");
const common = require("./.webpack/webpack.common.config");
const config = [];
function addAppConfig(app) {
app.module = common.module;
app.resolve = common.resolve;
config.push(app);
}
module.exports = (env, argv) => {
switch (argv.app) {
// Add new configs to below
case "a":
addAppConfig(aa);
break;
case "b":
addAppConfig(bb);
break;
case "c":
addAppConfig(cc);
break;
default:
case "all":
addAppConfig(xyz);
}
switch (env) {
case "local":
config.forEach(appConfig => {
// The "development" mode configuration option tells webpack to use its built-in development optimizations
// https://webpack.js.org/configuration/mode/#mode-development
appConfig.mode = "development";
appConfig.output.path = path.resolve(__dirname, "../dist");
appConfig.output.publicPath = "http://localhost:3000/dist";
appConfig.devtool = "inline-source-map";
appConfig.devServer = {
contentBase: path.resolve(__dirname, "./public"),
port: "3000",
watchContentBase: true
};
});
break;
case "development":
config.forEach(appConfig => {
// The "development" mode configuration option tells webpack to use its built-in development optimizations
// https://webpack.js.org/configuration/mode/#mode-development
appConfig.mode = "development";
appConfig.devtool = "inline-source-map";
});
break;
default:
case "production":
config.forEach(appConfig => {
// The "production" mode configuration option tells webpack to use its built-in production optimizations including minification etc.
// https://webpack.js.org/configuration/mode/#mode-production
appConfig.mode = "production";
appConfig.devtool = "cheap-source-map";
});
break;
}
return config;
};webpack.common.config.js - 这个文件在 webpack.config.js 中被使用
module.exports = {
module: {
rules: [
{
test: /\.jsx?$/,
exclude: /node_modules/,
use: {
loader: "babel-loader"
}
},
{
test: /\.(s*)css$/,
use: [
{
loader: "file-loader",
options: {
name: "[name].css"
}
},
"extract-loader",
"css-loader",
"sass-loader"
]
},
{
test: /\.(png|jp(e*)g)$/,
use: [
{
loader: "url-loader",
options: {
// Convert images < 8kb to base64 strings
limit: 8000,
name: "images/[name].[ext]"
}
}
]
},
{
test: /\.(svg)$/,
use: [
{
loader: "url-loader",
options: {
// 80kb limit to avoid an IE11 display bug
limit: 80000,
name: "images/[name].[ext]"
}
}
]
},
{
test: /\.(woff|woff2|eot|ttf)$/,
use: [
{
loader: "url-loader",
options: {
// Convert images < 8kb to base64 strings
limit: 8000,
name: "fonts/[name].[ext]"
}
}
]
}
]
},
resolve: {
extensions: [".js", ".jsx"]
}
};最后：
document.scss
.aside__left, .aside__right {
@if $env == 'development' {
background-color: red;
} @else {
background-color: green;
}
background-color: $desiredColor;
}
- options有一个未知的属性'data'。这些属性是有效的： object { implementation？, sassOptions？, additionalData？, sourceMap？, webpackImporter？}文档还明确提到了data被忽略了https://webpack.js.org/loaders/sass-loader/#sassoptions - Oliver Salzburg