date.getDay
date.getDay
getDay()方法根据本地时间返回指定日期的星期值，其中0代表星期日。查看指定日期在这个月的哪一天，请用getDate()。
语法
dateObj.getDay()
返回值
根据当地时间，给定日期所对应的整数编号为: 周日为0，周一为1，周二为2，以此类推。
例子
使用 getDay()
下面的第二个语句根据Date对象Xmas95的值，将值1分配给变量weekday。 December 25, 1995 是 星期一。
var Xmas95 = new Date('December 25, 1995 23:15:30'
var weekday = Xmas95.getDay(
console.log(weekday // 1
规格
| Specification | Status | Comment |
|---|---|---|
| ECMAScript Latest Draft (ECMA-262)The definition of 'Date.prototype.getDay' in that specification. | Living Standard | |
| ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'Date.prototype.getDay' in that specification. | Standard | |
| ECMAScript 5.1 (ECMA-262)The definition of 'Date.prototype.getDay' in that specification. | Standard | |
| ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.0. |
浏览器兼容性
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic Support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
| Feature | Android | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
|---|---|---|---|---|---|---|---|
| Basic Support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
