getDay()
方法根据本地时间,返回一个具体日期中一周的第几天,0 表示星期天。对于某个月中的第几天,参考Date.prototype.getDate()
.
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语法
dateObj.getDay()
返回值
根据本地时间,返回一个0到6之间的整数值,代表星期几: 0 代表星期日, 1 代表星期一,2 代表星期二, 依次类推。
例子
使用getDay()
下面第二条语句,基于Date
对象 Xmas95
的值,把 1 赋值给 weekday
。也就是说1995年12月25日是星期一。
var Xmas95 = new Date("December 25, 1995 23:15:30");
var weekday = Xmas95.getDay();
console.log(weekday); // 1
注意:如果需要,可以使用Intl.DateTimeFormat
与一个额外的options
参数,从而返回这天的全称(如"Monday"
).使用此方法,结果会更加国际化:
var options = { weekday: 'long'};
console.log(new Intl.DateTimeFormat('en-US', options).format(Xmas95));
// Monday
console.log(new Intl.DateTimeFormat('de-DE', options).format(Xmas95));
// Montag
规范
规范版本 | 规范状态 | 注解 |
---|---|---|
ECMAScript Latest Draft (ECMA-262) Date.prototype.getDay |
Draft | |
ECMAScript 2015 (6th Edition, ECMA-262) Date.prototype.getDay |
Standard | |
ECMAScript 5.1 (ECMA-262) Date.prototype.getDay |
Standard | |
ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.0. |
浏览器兼容性
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
getDay |
Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 3 | Opera Full support Yes | Safari Full support Yes | WebView Android Full support 1 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support 1.0 | nodejs Full support Yes |
Legend
- Full support
- Full support