在javascript中将UTC时间转换为小时、分钟和AM/PM格式
问题描述：
给定 UTC 时间，将其转换为以小时、分钟和 AM/PM(例如3:30 PM")为单位的格式的简单方法是什么?
Given a UTC time, what is a simple way of converting it to a format in hours, minutes, and AM/PM (e.g. '3:30 PM')?
答
// d = new Date(utc);
var hour = d.getHours() == 0 ? 12 : (d.getHours() > 12 ? d.getHours() - 12 : d.getHours());
var min = d.getMinutes() < 10 ? '0' + d.getMinutes() : d.getMinutes();
var ampm = d.getHours() < 12 ? 'AM' : 'PM';
var time = hour + ':' + min + ' ' + ampm;