setDate()
方法根据本地时间来指定一个日期对象的天数。
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语法
dateObj.setDate(dayValue)
参数
-
dayValue
- 一个整数,表示该月的第几天。
描述
如果 dayValue
超出了月份的合理范围,setDate
将会相应地更新 Date
对象。
例如,如果为 dayValue
指定0,那么日期就会被设置为上个月的最后一天。
如果dayValue被设置为负数,日期会设置为上个月最后一天往前数这个负数绝对值天数后的日期。-1会设置为上月最后一天的前一天(译者注:例如当前为4月,如果setDate(-2),则为3月29日)
例子
例子:使用setDate
方法
var theBigDay = new Date(1962, 6, 7); // 1962-07-07 theBigDay.setDate(24); // 1962-07-24 theBigDay.setDate(32); // 1962-08-01
规范
规范版本 | 规范状态 | 注解 |
---|---|---|
ECMAScript 1st Edition. Implemented in JavaScript 1.0 | Standard | Initial definition. |
ECMAScript 5.1 (ECMA-262) Date.prototype.setDate |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) Date.prototype.setDate |
Standard |
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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
setDate |
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