如何解析mocha-webpack中的laravel vue单文件组件别名

Question

我使用vuejs在Laravel5.7建立一个SPA。我用mocha-webpack和vue-test-utils编写了一些vue组件测试。

测试似乎无法将样式表导入到组件中。例如:我有一个ExampleComponent.vue，它包括以下内容：

</script>

<style lang="scss" scoped>

@import '@/_variables.scss';

.subpanel-control > ul > li {
    background-color: lighten($body-bg, 50);
    margin-left: 10px;
    height: 25px;
    width: 25px;
    line-height: 25px;
    color: $body-bg;
}

在运行npm run test时，我得到以下错误：

Error in ./resources/assets/js/components/Panel.vue?vue&type=style&index=0&id=21f01f46&lang=scss&scoped=true&

  Module build failed (from ./node_modules/sass-loader/dist/cjs.js):

  @import '@/variables';
         ^
        Can't find stylesheet to import.
     ╷
  98 │ @import '@/variables';
     │         ^^^^^^^^^^^^^
     ╵
    stdin 98:9  root stylesheet
        in C:\Users\jjackson\Documents\projects\wave\resources\assets\js\components\Panel.vue (line 98, column 9)

我不明白为什么它不理解别名@。这是我的webpack.mix.js：

let mix = require('laravel-mix');
const path = require('path');

mix.js('resources/assets/js/app.js', 'public/js')
    .sass('resources/assets/sass/app.scss', 'public/css')
    .sass('resources/assets/sass/nifty.scss', 'public/css', {
        implementation: require('node-sass')
    })
    .sass('resources/assets/sass/themes/type-b/theme-ocean.scss', 'public/css')
    .less('resources/assets/less/bootstrap-4-utilities.less', 'public/css')
    .webpackConfig({
        resolve: {
            alias: {
                '@': path.resolve('resources/assets/sass'),
                '~': path.resolve('resources/assets/js')
            }
        }
    })
    .sourceMaps();

if (mix.inProduction()) {
    mix.version();
}

如能提供任何帮助，将不胜感激。

Answer 1

结果发现这是一个码头问题。试图在docker环境之外运行npm run dev，这导致了此错误。当我在容器中运行所有npm命令时，一切正常。

Answer 2

当我挣扎于同样的问题时，我登上了这个页面-- https://github.com/vuejs/vue-cli/issues/4053和robbishop的一条评论，让我找到了我的解决方案。使用上述方法，我设法在webpack.mix.js中找到了一种似乎有效的配置：

null-loader)

• Add

1. 第一次安装null-
2. (npm i -D -D)规则中的一行：

{ test: /\.scss$/, use: [{ loader: 'null-loader' }] }

我的webpack.mix.js看起来是这样的：

const mix = require('laravel-mix');

/*
 |--------------------------------------------------------------------------
 | Mix Asset Management
 |--------------------------------------------------------------------------
 |
 | Mix provides a clean, fluent API for defining some Webpack build steps
 | for your Laravel application. By default, we are compiling the Sass
 | file for the application as well as bundling up all the JS files.
 |
 */

mix.js('resources/js/app.js', 'public/js')
    .webpackConfig({
        module: {
            rules: [
                { test: /\.scss$/, use: [{ loader: 'null-loader' }] }
            ]
        },
        resolve: {
            alias: {
                '@': path.resolve('somepath/sass')
            }
        }
    })
    .sass('some/path/app.scss', 'some/path/css');

我的单元测试现在是在组件中导入scss时执行的。