有条件地将覆盖的 SCSS 应用于 Angular 组件

Question

I am trying to override the css for an Angular-Material component. I am using the

encapsulation:ViewEncapsulation.None

to override in order to avoid the deprecated /deep/ or ::ngdeep .

so my SCSS looks like this

.some-class {
  margin: 50px
}

.some-class .mat-form-field-wrapper {
  color: red;
}

and my html looks like this

<div class="input-field">
   <mat-form-field appearance="outline" class="some-class">
      <mat-label>Password</mat-label>
      <input matInput formControlName="password" required />
   </mat-form-field>
</div>

but I want to apply the property color: red only when a boolean is false. I tried to use ngClass but how do I appply the entire selector ( .some-class.mat-form-field-wrapper ) in the ngClass syntax.

my HTML with ngclass (incomplete)

<div class="input-field">
   <mat-form-field appearance="outline" class="some-class" [ngClass]="{
        ' *some way to get the class here* ':
          !passwordsRequirementSatisfied && f.password.touched
      }">
      <mat-label>Password</mat-label>
      <input matInput formControlName="password" required />
   </mat-form-field>
</div>

Is there any way in css or scss that I can assign the entire selector .some-class.mat-form-field-wrapper to a variable or a placeholder class or a different class so that I can use that variable/placeholder class directly with the [ngClass] syntax.

Answer 1

You can try something like this:

 .some-class.is-invalid.mat-form-field-wrapper { color: red; }

 <div class="input-field"> <mat-form-field appearance="outline" class="some-class" [class.is-invalid]=".passwordsRequirementSatisfied && f.password.touched"> <mat-label>Password</mat-label> <input matInput formControlName="password" required /> </mat-form-field> </div>