37 lines
879 B
TypeScript
37 lines
879 B
TypeScript
// #docregion
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import {Component, OnInit, OnDestroy} from 'angular2/core';
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@Component({
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selector:'countdown-timer',
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template: '<p>{{message}}</p>'
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})
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export class CountdownTimerComponent implements OnInit, OnDestroy {
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intervalId = 0;
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message = '';
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seconds = 11;
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clearTimer() {clearInterval(this.intervalId);}
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ngOnInit() { this.start(); }
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ngOnDestroy() { this.clearTimer(); }
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start() { this._countDown(); }
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stop() {
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this.clearTimer();
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this.message = `Holding at T-${this.seconds} seconds`;
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}
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private _countDown() {
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this.clearTimer();
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this.intervalId = setInterval(()=>{
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this.seconds -= 1;
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if (this.seconds == 0) {
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this.message = "Blast off!";
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} else {
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if (this.seconds < 0) { this.seconds = 10;} // reset
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this.message = `T-${this.seconds} seconds and counting`;
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}
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}, 1000);
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}
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} |