A guess on Angular Material UI

[reboottime]

Below is a speculative explanation of how the Material UI button functions, focusing on the mat-raised-button directive, without referring to the actual source code.

• Define the directives

import { Directive, ElementRef, Renderer2, OnInit } from '@angular/core';

@Directive({
  selector: '[mat-raised-button]'
})
export class MatRaisedButtonDirective implements OnInit {
  
  constructor(private el: ElementRef, private renderer: Renderer2) {}

  ngOnInit() {
    // Add Material Design specific classes
    this.renderer.addClass(this.el.nativeElement, 'mat-button');
    this.renderer.addClass(this.el.nativeElement, 'mat-raised-button');

    // Add any additional styles or attributes necessary for the raised effect
    this.renderer.setStyle(this.el.nativeElement, 'box-shadow', '0px 3px 1px -2px rgba(0,0,0,0.2), 0px 2px 2px 0px rgba(0,0,0,0.14), 0px 1px 5px 0px rgba(0,0,0,0.12)');
    // ... other styles or event bindings
  }
}

• define the module

@NgModule({
  declarations: [
    MatRaisedButtonDirective,
    // ... other components and directives
  ],
  // ...
})
export class MaterialModule { }

• Apply the directive

<button mat-raised-button>Click Me</button>