How to use vue to convert timestamps into custom time formats

export function formatDate (date, fmt) {
if (/(y+)/.test(fmt)) {
fmt = fmt.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length));
}
let o = {
'M+': date.getMonth() + 1,
'd+': date.getDate(),
'h+': date.getHours(),
'm+': date.getMinutes(),
's+': date.getSeconds()
};
for (let k in o) {
if (new RegExp(`(${k})`).test(fmt)) {
let str = o[k] + '';
fmt = fmt.replace(RegExp.$1, (RegExp.$1.length === 1) ? str : padLeftZero(str));
}
}
return fmt;
};
function padLeftZero (str) {
return ('00' + str).substr(str.length);
};

import {formatDate} from '../../date.js';

formatDate(new Date(time * 1000), 'yyyy-MM-dd hh:mm');