Angular 4 + Material 2 SASS编译错误"要导入的文件未找到或不可读"

Question

我正在尝试使用自定义主题,但我一直收到错误:

{
  "status": 1,
  "file": "/home/adam/Projects/test-material/src/unicorn.scss",
  "line": 1,
  "column": 1,
  "message": "File to import not found or unreadable: ~@angular/material/theming.\nParent style sheet: /home/adam/Projects/test-material/src/unicorn.scss",
  "formatted": "Error: File to import not found or unreadable: ~@angular/material/theming.\n       Parent style sheet: /home/adam/Projects/test-material/src/unicorn.scss\n        on line 1 of src/unicorn.scss\n>> @import '~@angular/material/theming';\n   ^\n"
}

我已经安装了一个白兰地新的Angular来测试它,我一直得到同样的错误.我试过了:

$ ng new test-material
$ cd test-material/
$ npm install --save @angular/material

然后我创建了一个名为src/unicorn.scss并粘贴自https://material.angular.io/guide/theming的示例自定义主题的文件,并尝试使用以下方法编译它: $ node-sass src/unicorn.scss dist/unicorn.css 我得到了前面提到的错误.内容unicorn.scss是:

@import '~@angular/material/theming';
@include mat-core();
$candy-app-primary: mat-palette($mat-indigo);
$candy-app-accent:  mat-palette($mat-pink, A200, A100, A400);
$candy-app-warn:    mat-palette($mat-red);
$candy-app-theme: mat-light-theme($candy-app-primary, $candy-app-accent, $candy-app-warn);
@include angular-material-theme($candy-app-theme);

我正在使用Angular 4和Material 2.0.0-beta.3这是我的package.json:

{
  "name": "test-material",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/common": "^4.0.0",
    "@angular/compiler": "^4.0.0",
    "@angular/core": "^4.0.0",
    "@angular/forms": "^4.0.0",
    "@angular/http": "^4.0.0",
    "@angular/material": "^2.0.0-beta.3",
    "@angular/platform-browser": "^4.0.0",
    "@angular/platform-browser-dynamic": "^4.0.0",
    "@angular/router": "^4.0.0",
    "core-js": "^2.4.1",
    "rxjs": "^5.1.0",
    "zone.js": "^0.8.4"
  },
  "devDependencies": {
    "@angular/cli": "1.0.0",
    "@angular/compiler-cli": "^4.0.0",
    "@types/jasmine": "2.5.38",
    "@types/node": "~6.0.60",
    "codelyzer": "~2.0.0",
    "jasmine-core": "~2.5.2",
    "jasmine-spec-reporter": "~3.2.0",
    "karma": "~1.4.1",
    "karma-chrome-launcher": "~2.0.0",
    "karma-cli": "~1.0.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "karma-coverage-istanbul-reporter": "^0.2.0",
    "protractor": "~5.1.0",
    "ts-node": "~2.0.0",
    "tslint": "~4.5.0",
    "typescript": "~2.2.0"
  }
}

Answer 1

我解决了前面的问题，如下所示。

第一步：在目录中
创建。customTheme.scsssrc

@import '../node_modules/@angular/material/_theming';

@include mat-core();

$candy-app-primary: mat-palette($mat-cyan);
$candy-app-accent:  mat-palette($mat-green, A200, A100, A400);
$candy-app-warn:    mat-palette($mat-red);
$candy-app-theme: mat-light-theme($candy-app-primary, $candy-app-accent, $candy-app-warn);
@include angular-material-theme($candy-app-theme);

重要提示：import 语句取决于角度材料版本，并且 import 语句位置取决于您的customTheme.scss位置。

第二步：
添加customTheme.scss到样式数组中.angular-cli.json

styles": [
        "styles.css",
        "customTheme.scss"
      ],

Answer 2

在材料版本中2.0.0-beta.3没有文件'~@angular/material/theming';

如果您检查node_modules/@angular/material目录，您将看到其中存在，_theming.scss因此您需要执行以下操作：

@import '~@angular/material/_theming';

重要的：

sass-loader v6.0.4中有一个错误，您需要.scss在导入中添加扩展@import '~@angular/material/_theming.scss';，而下一个不再sass-loader v6.0.5需要.scss