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angular material - Slider custom formatted thumb label

app.component.ts 

import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styles: [`
    mat-slider{
      width: 400px;
    }
  `]
})


export class AppComponent { 
  value:number = 1;

  formatLabel(value: number) {
      return String.fromCharCode(value); 
  }
}
app.component.html 

<h2 style="padding-top:25px; padding-bottom:25px;">
    Angular Material - Show custom thumb label in Slider
</h2>


<h3>Selected Value : {{value}}</h3>
<h3>String From Char Code : {{formatLabel(value)}}</h3>

<mat-slider 
    [(ngModel)]="value"
    thumbLabel="true"
    min="1"
    max="120"
    [displayWith]="formatLabel">
</mat-slider>
app.module.ts [import] 

import { MatSliderModule } from '@angular/material/slider';
import { FormsModule } from '@angular/forms';
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