时间戳单位为秒时

import moment from 'moment';

let timeStr = moment.unix(1537527600).format('HH:mm:ss');

console.log('timeStr' );   //  19:00:00

时间戳单位为毫秒时

import moment from 'moment';

let timeStr = moment(1537527600000).format('HH:mm:ss');

console.log('timeStr' );   //  19:00:00