问题描述
我有
style.css
section {
display: flex;
background: url('./bg.svg');
}
script.mjs
import css from './style.css'
console.log(css)
webpack.config.mjs
import path from 'path'
import url from 'url';
import autoprefixer from 'autoprefixer'
const __dirname = path.dirname(url.fileURLToPath(import.Meta.url))
export default {
mode: 'production',context: path.resolve(__dirname),entry: path.resolve(__dirname,'script.mjs'),output: {
path: path.resolve(__dirname,'build'),filename: `[name].js`,},module: {
rules: [
{
test: /\.(svg|png|jpg|jpeg)$/,type: 'asset/inline',{
test: /\.css$/,type: 'asset/source',use: [
'css-loader',{
loader: 'postcss-loader',options: {
plugins: [
autoprefixer,],}
package.json
{
"scripts": {
"build": "webpack --config webpack.config.mjs"
},"devDependencies": {
"autoprefixer": "~10.2.5","css-loader": "~5.2.4","postcss-loader": "~5.2.0","webpack": "~5.36.2","webpack-cli": "~4.6.0"
}
}
预期的 console.log 输出
display: -webkit-Box;display: -ms-flexBox;display: flex;background: url('data:image/svg+xml;utf8,...');
实际结果
PostCSS Loader has been initialized using an options object that does not match the API schema"
当 webpack.config.mjs 中没有 postcss-loader 时,我在 console.log 中得到了错误的输出:
// Imports
import ___CSS_LOADER_API_IMPORT___ from "./node_modules/css-loader/dist/runtime/api.js";
import ___CSS_LOADER_GET_URL_IMPORT___ from "./node_modules/css-loader/dist/runtime/getUrl.js";
import ___CSS_LOADER_URL_IMPORT_0___ from "./bg.svg";
var ___CSS_LOADER_EXPORT___ = ___CSS_LOADER_API_IMPORT___(function(i){return i[1]});
var ___CSS_LOADER_URL_REPLACEMENT_0___ = ___CSS_LOADER_GET_URL_IMPORT___(___CSS_LOADER_URL_IMPORT_0___);
// Module
___CSS_LOADER_EXPORT___.push([module.id,"section {\n\tdisplay: flex;\n\tbackground: url(" + ___CSS_LOADER_URL_REPLACEMENT_0___ + ");\n}",""]);
// Exports
export default ___CSS_LOADER_EXPORT___;
解决方法
请针对两个不同的问题尝试这些修复
- PostCSS 加载器未初始化:
//....{
loader: "postcss-loader",options: {
postcssOptions: {
plugins: [
autoprefixer,],},//....
- 控制台未按预期注销: 目前,CSS 文件正在加载但未转换为字符串,因此您会在控制台中看到垃圾。您需要 systemjs/text plugin 将 CSS 文件中的文本作为字符串加载。
首先在终端中执行以下操作
//install Systemjs
npm install systemjs
//install jspm
npm install jspm@0.16x -g
// change over to your project directory
cd my-project
//intall jspm into your project
npm install jspm@0.16x --save-dev
//initialise jspm
jspm init
//install text plugin
jspm install text
然后在你的 script.mjs
import './style.css!';
// Now,you can retrieve the contents of the file using the text plugin:
import css from './style.css!text';
console.log(css);
请注意:还有其他安装 systemjs/text 插件的方法。有关更多安装信息,请参阅 systemjs/text 和 systemjs。
如果可行,请点赞并接受答案。 如果不乐意解决。 快乐编码!!