VueUse中文文档useDateFormat
Get the formatted date according to the string of tokens passed in, inspired by dayjs.
List of all available formats (HH:mm:ss by default):
| Format | Output | Description |
|---|---|---|
YY | 18 | Two-digit year |
YYYY | 2018 | Four-digit year |
M | 1-12 | The month, beginning at 1 |
MM | 01-12 | The month, 2-digits |
MMM | Jan-Dec | The abbreviated month name |
MMMM | January-December | The full month name |
D | 1-31 | The day of the month |
DD | 01-31 | The day of the month, 2-digits |
H | 0-23 | The hour |
HH | 00-23 | The hour, 2-digits |
h | 1-12 | The hour, 12-hour clock |
hh | 01-12 | The hour, 12-hour clock, 2-digits |
m | 0-59 | The minute |
mm | 00-59 | The minute, 2-digits |
s | 0-59 | The second |
ss | 00-59 | The second, 2-digits |
SSS | 000-999 | The millisecond, 3-digits |
A | AM PM | The meridiem |
AA | A.M. P.M. | The meridiem, periods |
a | am pm | The meridiem, lowercase |
aa | a.m. p.m. | The meridiem, lowercase and periods |
d | 0-6 | The day of the week, with Sunday as 0 |
dd | S-S | The min name of the day of the week |
ddd | Sun-Sat | The short name of the day of the week |
dddd | Sunday-Saturday | The name of the day of the week |
- Meridiem is customizable by defining
customMeridieminoptions.
例子
Usage
Basic
html
<script setup lang="ts">
import { useNow, useDateFormat } from '@vueuse/core'
const formatted = useDateFormat(useNow(), 'YYYY-MM-DD HH:mm:ss')
</script>
<template>
<div>{{ formatted }}</div>
</template>
<script setup lang="ts">
import { useNow, useDateFormat } from '@vueuse/core'
const formatted = useDateFormat(useNow(), 'YYYY-MM-DD HH:mm:ss')
</script>
<template>
<div>{{ formatted }}</div>
</template>
Use with locales
html
<script setup lang="ts">
import { useNow, useDateFormat } from '@vueuse/core'
const formatted = useDateFormat(useNow(), 'YYYY-MM-DD (ddd)', { locales: 'en-US' })
</script>
<template>
<div>{{ formatted }}</div>
</template>
<script setup lang="ts">
import { useNow, useDateFormat } from '@vueuse/core'
const formatted = useDateFormat(useNow(), 'YYYY-MM-DD (ddd)', { locales: 'en-US' })
</script>
<template>
<div>{{ formatted }}</div>
</template>
Use with custom meridiem
html
<script setup lang="ts">
import { useDateFormat } from '@vueuse/core'
const customMeridiem = (hours: number, minutes: number, isLowercase?: boolean, hasPeriod?: boolean) => {
const m = hours > 11 ? (isLowercase ? 'μμ' : 'ΜΜ') : (isLowercase ? 'πμ' : 'ΠΜ')
return hasPeriod ? m.split('').reduce((acc, current) => acc += `${current}.`, '') : m
}
const am = useDateFormat('2022-01-01 05:05:05', 'hh:mm:ss A', { customMeridiem })
// am.value = '05:05:05 ΠΜ'
const pm = useDateFormat('2022-01-01 17:05:05', 'hh:mm:ss AA', { customMeridiem })
// pm.value = '05:05:05 Μ.Μ.'
</script>
<script setup lang="ts">
import { useDateFormat } from '@vueuse/core'
const customMeridiem = (hours: number, minutes: number, isLowercase?: boolean, hasPeriod?: boolean) => {
const m = hours > 11 ? (isLowercase ? 'μμ' : 'ΜΜ') : (isLowercase ? 'πμ' : 'ΠΜ')
return hasPeriod ? m.split('').reduce((acc, current) => acc += `${current}.`, '') : m
}
const am = useDateFormat('2022-01-01 05:05:05', 'hh:mm:ss A', { customMeridiem })
// am.value = '05:05:05 ΠΜ'
const pm = useDateFormat('2022-01-01 17:05:05', 'hh:mm:ss AA', { customMeridiem })
// pm.value = '05:05:05 Μ.Μ.'
</script>
类型声明(Type Declarations)
显示类型声明
typescript
export type DateLike = Date | number | string | undefined
export interface UseDateFormatOptions {
/**
* The locale(s) to used for dd/ddd/dddd/MMM/MMMM format
*
* [MDN]( https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Intl#locales_argument).
*/
locales?: Intl.LocalesArgument
/**
* A custom function to re-modify the way to display meridiem
*
*/
customMeridiem?: (
hours: number,
minutes: number,
isLowercase?: boolean,
hasPeriod?: boolean
) => string
}
export declare const formatDate: (
date: Date,
formatStr: string,
options?: UseDateFormatOptions
) => string
export declare const normalizeDate: (date: DateLike) => Date
/**
* Get the formatted date according to the string of tokens passed in.
*
* @see https://vueuse.org/useDateFormat
* @param date - The date to format, can either be a `Date` object, a timestamp, or a string
* @param formatStr - The combination of tokens to format the date
* @param options - UseDateFormatOptions
*/
export declare function useDateFormat(
date: MaybeComputedRef<DateLike>,
formatStr?: MaybeComputedRef<string>,
options?: UseDateFormatOptions
): ComputedRef<string>
export type UseDateFormatReturn = ReturnType<typeof useDateFormat>
export type DateLike = Date | number | string | undefined
export interface UseDateFormatOptions {
/**
* The locale(s) to used for dd/ddd/dddd/MMM/MMMM format
*
* [MDN]( https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Intl#locales_argument).
*/
locales?: Intl.LocalesArgument
/**
* A custom function to re-modify the way to display meridiem
*
*/
customMeridiem?: (
hours: number,
minutes: number,
isLowercase?: boolean,
hasPeriod?: boolean
) => string
}
export declare const formatDate: (
date: Date,
formatStr: string,
options?: UseDateFormatOptions
) => string
export declare const normalizeDate: (date: DateLike) => Date
/**
* Get the formatted date according to the string of tokens passed in.
*
* @see https://vueuse.org/useDateFormat
* @param date - The date to format, can either be a `Date` object, a timestamp, or a string
* @param formatStr - The combination of tokens to format the date
* @param options - UseDateFormatOptions
*/
export declare function useDateFormat(
date: MaybeComputedRef<DateLike>,
formatStr?: MaybeComputedRef<string>,
options?: UseDateFormatOptions
): ComputedRef<string>
export type UseDateFormatReturn = ReturnType<typeof useDateFormat>