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bambooom/dateCompare.js

Created April 13, 2017 02:22
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when variable s is null or undefined, what is Date(s) ?
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dateCompare.js
var s;
// s is undefined
new Date(s)
// -> Invalid date
new Date(s) < new Date()
// -> false
var s = null;
// s is null
new Date(s)
// -> Thu Jan 01 1970 08:00:00 GMT+0800 (HKT)
// i.e. the starting time of unix
new Date(s) < new Date()
// -> true
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