Guide on customizing a dropdown button in a class-based Angular library with version 4 or higher

My dilemma revolves around utilizing the Angular Material library for a drop-down navigation bar. The issue at hand is my desire to hover through the list, yet I am unable to tweak the style within HTML. Fortunately, I can easily make alterations in Chrome.

/* Class set by Angular Material itself */

button.mat-menu-item:hover {
    width: 100%;
    color: green;
}

<mat-menu #menu="matMenu">
  <a href="https://google.com"><button mat-menu-item>Help</button></a>
  <button mat-menu-item (click)="Logout()">Sign Out</button>
</mat-menu>

Despite attempting to implement this CSS styling, it fails to take effect. I experimented with applying a class, but unfortunately, that strategy also proved unsuccessful.

htmlcssangularangular-material

Answer №1

Due to the encapsulation of Angular styles. As mentioned by @devpato, you'll need to utilize ::ng-deep in order to achieve the desired styling for the mat button component.

It's important to note that using ::ng-deep on its own will apply that style to all buttons with the .mat-menu-item class throughout your application.

If you only want the style to affect a specific component, add :host before it (where :host refers to the component hosting the mat button component).

:host ::ng-deep button.mat-menu-item:hover {
   ....
}

Answer №2

button {
  -webkit-transition-duration: 0.4s; /* Safari */
  transition-duration: 0.4s;
}

button:hover {
  background-color: #4CAF50; /* Green */
  color: white;
}
<mat-menu #menu="matMenu">
              <a href="https://google.com"><button mat-menu-item>Help</button></a>
              <button mat-menu-item (click)="Logout()">Sign Out</button>
</mat-menu>

Answer №3

Give this a shot:

Implement ::ng-deep in your CSS to style elements within shadow DOM. The functionality may change in the future, but it's effective for now.

::ng-deep button.mat-menu-item:hover {
    width: 100%;
    color: green;
}

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