-
Notifications
You must be signed in to change notification settings - Fork 22.4k
/
index.md
64 lines (43 loc) · 2.48 KB
/
index.md
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
---
title: Date.prototype.setHours()
slug: Web/JavaScript/Reference/Global_Objects/Date/setHours
page-type: javascript-instance-method
browser-compat: javascript.builtins.Date.setHours
---
{{JSRef}}
The **`setHours()`** method of {{jsxref("Date")}} instances changes the hours, minutes, seconds, and/or milliseconds for this date according to local time.
{{EmbedInteractiveExample("pages/js/date-sethours.html")}}
## Syntax
```js-nolint
setHours(hoursValue)
setHours(hoursValue, minutesValue)
setHours(hoursValue, minutesValue, secondsValue)
setHours(hoursValue, minutesValue, secondsValue, msValue)
```
### Parameters
- `hoursValue`
- : An integer between 0 and 23 representing the hours.
- `minutesValue` {{optional_inline}}
- : An integer between 0 and 59 representing the minutes.
- `secondsValue` {{optional_inline}}
- : An integer between 0 and 59 representing the seconds. If you specify `secondsValue`, you must also specify `minutesValue`.
- `msValue` {{optional_inline}}
- : An integer between 0 and 999 representing the milliseconds. If you specify `msValue`, you must also specify `minutesValue` and `secondsValue`.
### Return value
Changes the {{jsxref("Date")}} object in place, and returns its new [timestamp](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date#the_epoch_timestamps_and_invalid_date). If a parameter is `NaN` (or other values that get [coerced](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number#number_coercion) to `NaN`, such as `undefined`), the date is set to [Invalid Date](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date#the_epoch_timestamps_and_invalid_date) and `NaN` is returned.
## Description
If you do not specify the `minutesValue`, `secondsValue`, and `msValue` parameters, the same values as what are returned by {{jsxref("Date/getMinutes", "getMinutes()")}}, {{jsxref("Date/getSeconds", "getSeconds()")}}, and {{jsxref("Date/getMilliseconds", "getMilliseconds()")}} are used.
If a parameter you specify is outside of the expected range, other parameters and the date information in the {{jsxref("Date")}} object are updated accordingly. For example, if you specify 100 for `secondsValue`, the minutes are incremented by 1 (`minutesValue + 1`), and 40 is used for seconds.
## Examples
### Using setHours()
```js
const theBigDay = new Date();
theBigDay.setHours(7);
```
## Specifications
{{Specifications}}
## Browser compatibility
{{Compat}}
## See also
- {{jsxref("Date.prototype.getHours()")}}
- {{jsxref("Date.prototype.setUTCHours()")}}