2018-countdown-timer-es6

timer.js

'use strict';

export default class Timer {
    constructor(callback){
        // Target Time : '2018-10-18T09:00:00'
        this.targetDate = new Date(Date.now() + 30 * 1000 + 120 * 1000);
        this.callback = callback;
        this.checkTime();
    }

	checkTime() {
		const now = Date.now();
		if (now > this.targetDate.getTime()) {
			this.callback({
				type: 'endCountDown',
				value: true,
			});
			return;
		}

		let diff = this.targetDate.getTime() - now;
		const minutes = new Intl.NumberFormat('fr', {
			minimumIntegerDigits: 2,
			useGrouping: false,
		}).format(Math.floor(diff / (60 * 1000)));
		const seconds = new Intl.NumberFormat('fr', {
			minimumIntegerDigits: 2,
			useGrouping: false,
		}).format(Math.floor((diff % (60 * 1000)) / 1000));
		const lastMinute = diff < 60 * 1000;
		this.callback({
			type: 'time',
			value: {
				minutes,
				seconds,
				lastMinute,
				diff,
			},
		});

		window.requestAnimationFrame(this.checkTime.bind(this));
	}
}