小编Anu*_*nup的帖子

我正在使用有角度的材料轮廓 mat-form-field 来设计一个表单。我得到了带有边框角半径的默认 mat-form-field 轮廓文本框视图。有什么办法可以去掉outline mat-form-field的边框角半径，转换成方形文本框视图。

我尝试使用以下内容更改角材料 mat-form-field 的默认样式，但它不起作用。

//css

.mat-form-field-appearance-outline .mat-form-field-outline-start 
.alignment{
border-top-left-radius: 0px;
border-top-right-radius: 0px;
border-bottom-right-radius: 0px;
border-bottom-left-radius: 0px;
}

//html

<mat-form-field appearance="outline" [hideRequiredMarker]="true" 
class="alignment">
<mat-label>Email Address</mat-label>
<input type="text" matInput placeholder="Enter email address">
</mat-form-field>

我希望轮廓 mat-form-field 没有边框角半径文本框，就像方形文本框 mat-form-field 一样，但获得默认的轮廓 mat-form-field 视图。

问题陈述：我正在实施 Angular 材料mat-form-field属性。我将表单字段外观作为大纲。我试图在选择输入时更改输入边框的颜色。

预期行为。选择输入时，输入字段轮廓边框颜色应更改。当表单域处于活动状态时，我想将轮廓的颜色更改为黑色。

当前行为：现在，当表单字段处于活动状态时，它会显示角度材料默认原色。

这都是我的依赖

{
  "dependencies": {
    "@angular/animations": "^6.1.9",
    "@angular/cdk": "^6.4.7",
    "@angular/common": "^6.1.0",
    "@angular/compiler": "^6.1.0",
    "@angular/core": "^6.1.0",
    "@angular/forms": "^6.1.0",
    "@angular/http": "^6.1.0",
    "@angular/material": "^6.4.7",
    "@angular/platform-browser": "^6.1.0",
    "@angular/platform-browser-dynamic": "^6.1.0",
    "@angular/router": "^6.1.0",
    "aws-amplify": "^1.1.6",
    "core-js": "^2.5.4",
    "hammerjs": "^2.0.8",
    "rxjs": "~6.2.0",
    "zone.js": "~0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.8.0",
    "@angular/cli": "~6.2.3",
    "@angular/compiler-cli": "^6.1.0",
    "@angular/language-service": "^6.1.0",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "~8.9.4",
    "codelyzer": "~4.3.0",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~3.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~1.1.2",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0", …