util. Collection and encapsulation of JS tool functions

function friendlyDate(timestamp) {
	var formats = {
		'year': '%n%  Years ago ',
		'month': '%n%  Month ago, ',
		'day': '%n%  Days ago, ',
		'hour': '%n%  Hours before ',
		'minute': '%n%  Minutes ago ',
		'second': '%n%  Seconds ago ',
	};

	var now = Date.now();
	var seconds = Math.floor((now - timestamp) / 1000);
	var minutes = Math.floor(seconds / 60);
	var hours = Math.floor(minutes / 60);
	var days = Math.floor(hours / 24);
	var months = Math.floor(days / 30);
	var years = Math.floor(months / 12);

	var diffType = '';
	var diffValue = 0;
	if (years > 0) {
		diffType = 'year';
		diffValue = years;
	} else {
		if (months > 0) {
			diffType = 'month';
			diffValue = months;
		} else {
			if (days > 0) {
				diffType = 'day';
				diffValue = days;
			} else {
				if (hours > 0) {
					diffType = 'hour';
					diffValue = hours;
				} else {
					if (minutes > 0) {
						diffType = 'minute';
						diffValue = minutes;
					} else {
						diffType = 'second';
						diffValue = seconds === 0 ? (seconds = 1) : seconds;
					}
				}
			}
		}
	}
	return formats[diffType].replace('%n%', diffValue);
}

function getDate() {
	let myDate = new Date()
	let month = myDate.getMonth()
	if (month < 10) {
		month = '0' + (month + 1)
	}
	let day = myDate.getDate()
	if (day < 10) {
		day = '0' + day
	}
	let date = myDate.getFullYear() + '-' + month + '-' + day
	return date
}

function getTime() {
	let myDate = new Date()
	let hour = myDate.getHours()
	if (hour < 10) {
		hour = '0' + hour
	}
	let min = myDate.getMinutes()
	if (min < 10) {
		min = '0' + min
	}
	let time = hour + ':' + min
	return time
}

module.exports = {
	friendlyDate: friendlyDate,
        getDate: getDate,
        getTime: getTime
}

main.js Is mounted as a global method in

import { friendlyDate } from './common/util.js'
Vue.prototype.$friendlyDate = friendlyDate