Utilize custom SCSS styling for Angular component based on specific conditions

Currently, I am attempting to customize the css for an Angular-Material component. To achieve this, I am utilizing

encapsulation:ViewEncapsulation.None

in order to sidestep using the deprecated /deep/ or ::ngdeep.

Thus, my SCSS code appears as follows:

.some-class {
  margin: 50px
}

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

Meanwhile, my html code 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>

However, I aim to apply the style property color: red only when a boolean value is false. I experimented with ngClass but encountered challenges in referencing the complete selector (

.some-class .mat-form-field-wrapper
) within the syntax.

Below is my HTML code snippet incorporating ngClass (though incomplete):

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

Are there any techniques in css or scss that would allow me to assign the entire selector

.some-class .mat-form-field-wrapper
to a variable, placeholder class, or different class? This would enable direct usage of said variable/placeholder class within the [ngClass] syntax.

Answer №1

If you're looking to achieve a similar effect, consider the following code snippet:

.custom-class.error .form-field-wrapper {
  color: red;
}
<div class="input-container">
   <form-field
    appearance="outline"
    class="custom-class"
    [class.error]="!conditionsMet && formField.touched">
      <label>Sample Label</label>
      <input fieldControlName="sample" required />
   </mat-form-field>
</div>

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