2 way binding in angular code example

Example 1: Bidirectionnal model binding

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      <app-sizer [(size)]="fontSizePx"></app-sizer>

Example 2: property binding angular documentation

// component.ts

    @Component({
      templateUrl: 'component.html',
      selector: 'app-component',
    })
    export class Component {
      name = 'Peter';

      updateName() {
        this.name = 'John';
      }
    }
        // component.html

    <p>My name is {{name}}</p>
    <button (click)="updateName()">Update button</button>