# vue-moment
[](https://badge.fury.io/js/vue-moment)
[](https://travis-ci.org/brockpetrie/vue-moment)
[](https://www.npmjs.com/package/vue-moment)
[](https://opensource.org/licenses/MIT)
Handy [Moment.js](http://www.momentjs.com) filters for your [Vue.js](http://vuejs.org/) project.
## Installation
Install via NPM...
```sh
$ npm install vue-moment
```
...and require the plugin like so:
```js
Vue.use(require('vue-moment'));
```
## Usage
Simply set `moment` as the filtering function and you're good to go. At least one argument is expected, which the filter assumes to be a `format` string if the argument doesn't match any of the other filtering methods.
```html
{{ someDate | moment("dddd, MMMM Do YYYY") }}
{{ new Date() | moment("dddd, MMMM Do YYYY") }}
```
## Passing Your Date
Moment.js expects your input to be either: a valid ISO 8601 formatted string (see ), a valid `Date` object, a Unix timestamp (in seconds or milliseconds, passed as a Number), or a date string with an accompanying format pattern (i.e. when you know the format of the date input). For the latter, `vue-moment` allows you to pass your date and format pattern(s) as an array, like such:
```html
{{ [ someDate, "MM.DD.YY" ] | moment("dddd, MMMM Do YYYY") }}
{{ [ someDate, ["MM.DD.YY", "MM-DD-YY", "MM-DD-YYYY"] ] | moment("dddd, MMMM Do YYYY") }}
```
As of 3.0.0, passing an empty or invalid input will no longer initiate moment with a new `Date` object fallback.
## Filtering Methods
### format (default)
This is the default filtering option. Formats the date against a string of tokens. See for a list of tokens and examples.
**Default**
```html
{{ someDate | moment("YYYY") }}
{{ someDate | moment("ddd, hA") }}
{{ someDate | moment("dddd, MMMM Do YYYY, h:mm:ss a") }}
```
For more information about `moment#format`, check out .
### from
Display a Moment in relative time, either from now or from a specified date.
**Default** (calculates from current time)
```html
{{ someDate | moment("from", "now") }}
{{ someDate | moment("from") }}
```
**With a reference time given**
```html
{{ someDate | moment("from", "Jan. 11th, 1985") }}
```
**With suffix hidden** (e.g. '4 days ago' -> '4 days')
```html
{{ someDate | moment("from", "now", true) }}
{{ someDate | moment("from", true) }}
{{ someDate | moment("from", "Jan. 11th, 2000", true) }}
```
For more information about `moment#fromNow` and `moment#from`, check out and .
### calendar
Formats a date with different strings depending on how close to a certain date (today by default) the date is. You can also pass a reference date and options.
**Default** (calculates from current time)
```html
{{ someDate | moment("calendar") }}
```
**With a reference time given**
```html
{{ someDate | moment("calendar", "July 10 2011") }}
```
**With options**
```html
{{ new Date() | moment('add', '6 days', 'calendar', null, { nextWeek: '[Happens in a week]' }) }}
```
For more information about `moment#calendar`, check out .
### add
Mutates the original Moment by adding time.
```html
{{ someDate | moment("add", "7 days") }}
{{ someDate | moment("add", "1 year, 3 months, 30 weeks, 10 days") }}
```
For more information about `moment#add`, check out .
### subtract
Works the same as `add`, but mutates the original moment by subtracting time.
```html
{{ someDate | moment("subtract", "3 hours") }}
```
For more information about `moment#subtract`, check out .
### timezone
Convert the date to a certain timezone
```html
{{ date | moment('timezone', 'America/Los_Angeles', 'LLLL ss')}}
```
**To use this filter you will need to pass `moment-timezone` through to the plugin**
```js
// main.js
import Vue from 'vue'
import VueMoment from 'vue-moment'
import moment from 'moment-timezone'
Vue.use(VueMoment, {
moment,
})
```
For more information about `moment#timezone`, check out .
## Chaining
There's some built-in (and not thoroughly tested) support for chaining, like so:
```html
{{ someDate | moment("add", "2 years, 8 days", "subtract", "3 hours", "ddd, hA") }}
```
This would add 2 years and 8 months to the date, then subtract 3 hours, then format the resulting date.
## Durations
`vue-moment` also provides a `duration` filter that leverages Moment's ability to parse, manipulate and display durations of time. Durations should be passed as either: a String of a valid ISO 8601 formatted duration, a Number of milliseconds, an Array containing a number and unit of measurement (for passing a number other than milliseconds), or an Object of values (for when multiple different units of measurement are needed).
```html
{{ 3600000 | duration('humanize') }}
{{ 'PT1800S' | duration('humanize') }}
{{ [35, 'days'] | duration('humanize', true) }}
```
This filter is purely a pass-through proxy to `moment.duration` methods, so pretty much all the functions outlined in their [docs](https://momentjs.com/docs/#/durations/) are callable.
```html
{{ [-1, 'minutes'] | duration('humanize', true) }}
{{ { days: 10, months: 1 } | duration('asDays') }}
{{ 'P3D' | duration('as', 'hours') }}
```
For manipulating a duration by either subtraction or addition, first use the relevant filter option, then chain your duration display filter.
```html
{{ [1, 'minutes'] | duration('subtract', 120000) | duration('humanize', true) }}
{{ [-10, 'minutes'] | duration('add', 'PT11M') | duration('humanize', true) }}
{{ [2, 'years'] | duration('add', 1, 'year') | duration('humanize') }}
```
`duration` is for contextless lengths of time; for comparing 2 dates, use the `diff` method rather than hacking around with Moment durations. For more information about `moment#duration`, check out .
## Configuration
`vue-moment` should respect any global Moment customizations, including i18n locales. For more info, check out .
You can also pass a custom Moment object through with the plugin options. This technique is especially useful for overcoming the browserify locale bug demonstrated in the docs
```js
const moment = require('moment')
require('moment/locale/es')
Vue.use(require('vue-moment'), {
moment
})
console.log(Vue.moment().locale()) //es
```
## this.$moment
`vue-moment` attaches the momentjs instance to your Vue app as `this.$moment`.
This allows you to call [the static methods momentjs provides](https://momentjs.com/docs/#/i18n/listing-months-weekdays/).
If you're using i18n, it allows you to change the locale globally by calling `this.$moment.locale(myNewLocale)`