时间流逝
轻松测量已经过去的时间。
npm install time-elapsed
使用：
// Require the Module:
var TimeElapsed = require('time-elapsed');
// Create new Instance of Time Elapsed:
var timer = new TimeElapsed();
// Wait a duration of time:
setTimeout(function(){
// See how many Milliseconds it has been:
console.log('Time elapsed:', timer.timeElapsed());
}, 500);
