/TypeScript/Display digital clock in angular

Display digital clock in angular

// in ts file

import { Component, OnInit } from '@angular/core';
import { Subscription, timer } from 'rxjs';
import { map, share } from "rxjs/operators";
import { OnDestroy } from '@angular/core';


@Component({
  selector: 'app-clock',
  templateUrl: './clock.component.html',
  styleUrls: ['./clock.component.scss']
})
export class ClockComponent implements OnInit, OnDestroy {

  date: Date = new Date();

  constructor() {
  }

  time = new Date();
  rxTime = new Date();
  intervalId;
  subscription: Subscription;

  ngOnInit() {
    // Using Basic Interval
    this.intervalId = setInterval(() => {
      this.time = new Date();
    }, 1000);

    // Using RxJS Timer
    this.subscription = timer(0, 1000)
      .pipe(
        map(() => new Date()),
        share()
      )
      .subscribe(time => {
        this.rxTime = time;
      });
  }

  ngOnDestroy() {
    clearInterval(this.intervalId);
    if (this.subscription) {
      this.subscription.unsubscribe();
    }
  }

}

// in html
 Simple Clock:
 <div>{{ time | date: 'hh:mm:ss a' }}</div>
 RxJS Clock:
 <div>{{ rxTime | date: 'hh:mm:ss a' }}</div>

Similar codes

0 vote122 views1 answer
HOW TO DROP ALL TABLES WITH THEIR CONSTRAINTS AT ONCE IN ORACLE
TypeScript
6 votes118 views1 answer
React native typescrypt
TypeScript
0 vote139 views1 answer
Angular child routes not working
TypeScript
1 vote115 views1 answer
Add correct host key in known_hosts to get rid of this message
TypeScript
0 vote123 views1 answer
Alert angular
TypeScript
0 vote142 views1 answer
Mat-toolbar' is not a known element
TypeScript
0 vote120 views1 answer
Mongodb move documents to another collection
TypeScript
0 vote124 views1 answer
Code to check if a triangle is valid or not
TypeScript
1 vote130 views2 answers
View all foreign key constraints postgres
TypeScript
0 vote118 views1 answer
Error TS2304: Cannot find name 'EventEmitter'.
TypeScript