sass - Bootstrap 和 Angular 8. _root.scss 中 undefined variable

Question

我今天尝试将项目更新到 Angular 8.0.0，但遇到了 bootstrap 问题，无法找到解决方案。

我使用bootstrap 4.3.1

当我执行ngserve时，我收到此错误:

ERROR in ./node_modules/bootstrap/scss/bootstrap.scss (./node_modules/@angular-devkit/build-angular/src/angular-cli-files/plugins/raw-css-loader.js!./node_modules/postcss-loader/src??embedded!./node_modules/sass-loader/lib/loader.js??ref--13-3!./node_modules/bootstrap/scss/bootstrap.scss)
Module build failed (from ./node_modules/sass-loader/lib/loader.js):

  @each $color, $value in $colors {
                         ^
      Undefined variable.
  ╷
3 │   @each $color, $value in $colors {
  │                           ^^^^^^^
  ╵
  node_modules/bootstrap/scss/_root.scss 3:27  @import
  stdin 11:9                                   root stylesheet
      in ./node_modules/bootstrap/scss/_root.scss (line 3, column 27)

在我的 angular.json 中，我有这个(我刚刚包含了与 scss 相关的部分):

  "schematics": {
    "@schematics/angular:component": {
      "style": "sass"
    }
  },
  "architect": {
    "build": {
      "builder": "@angular-devkit/build-angular:browser",
      "options": {
        "outputPath": "dist",
        "index": "src/index.html",
        "main": "src/main.ts",
        "polyfills": "src/polyfills.ts",
        "tsConfig": "src/tsconfig.app.json",
        "assets": [
          "src/favicon.ico",
          "src/assets",
          "src/manifest.json"
        ],
        "styles": [
          "./node_modules/bootstrap/scss/bootstrap.scss",
          "./node_modules/c3/c3.css",
          "./node_modules/@fortawesome/fontawesome-free/css/all.css",
          "./node_modules/@angular/material/prebuilt-themes/indigo-pink.css",
          "./src/styles/styles.scss"
        ],
        "stylePreprocessorOptions": {
          "includePaths": [
            "src/styles"
          ]
        },
        "scripts": [],
        "es5BrowserSupport": true
      },

根据我对错误的理解，这是由于全局 scss 变量不可用，在 "./node_modules/bootstrap/scss/bootstrap.scss" 中，它看起来像这个:

@import "functions";
@import "variables";
@import "mixins";
@import "root";
@import "many_other_stuff"

$colors 变量在 "variables" 中定义，因此它应该在 "root" 中可用。

知道我在这里做错了什么吗？

Answer 1

应该是 scss 而不是 sass :

"schematics": {
    "@schematics/angular:component": {
      "style": "scss"
    }
  },

谢谢