Git Product home page Git Product logo

ngx-date-fns's Introduction

+ = ngx-date-fns

Build Status codecov npm version Known Vulnerabilities Conventional Commits

date-fns pipes for Angular 2.0 and above.

Table Of Contents

This library requires date-fns >= v2.16.1.

⚠️ There's a range of date-fns versions for which tree shaking is broken, so we recommend that you either install v2.16.1 or >= v2.21.1.

  • npm install --save date-fns
  • npm install --save ngx-date-fns

Import DateFnsModule into your app's module:

import { DateFnsModule } from 'ngx-date-fns';

@NgModule({
  imports: [
    // (...)
    DateFnsModule.forRoot()
  ]
})

In lazy loaded module declarations use imports: [DateFnsModule].

import { Component } from '@angular/core';
import { es } from 'date-fns/locale';

@Component({
  selector: 'my-component',
  template: `
    <p>{{ dateOne | dfnsFormat: 'yyyy/MM/dd' }}</p>
    <p>{{ [dateOne, dateTwo] | dfnsMin }}</p>
    <p>{{ [dateOne, dateTwo] | dfnsMax | dfnsFormat: 'EEE LLL d yyyy' }}</p>
    <p>{{ dateThree | dfnsFormatDistanceToNow: options }}</p>
  `
})
export class AppComponent {
  dateOne = new Date(2016, 0, 1);
  dateTwo = new Date(2017, 0, 1);
  dateThree: Date;
  options = {
    locale: es,
    addSuffix: true
  };
  constructor() {
    this.dateThree = new Date();
    this.dateThree.setDate(this.dateThree.getDate() - 6);
  }
}

The output:

2016/01/01

Fri Jan 01 2016 00:00:00 GMT+0100 (Central European Standard Time)

Sun January 1 2017

hace 6 días

All locale-aware pipes use English by default.

Instead of passing the locale to each pipe via options you can set it globally in one single step by overriding the default DateFnsConfiguration implementation:

import { DateFnsModule } from 'ngx-date-fns';
import { fr } from "date-fns/locale";

const frenchConfig = new DateFnsConfigurationService();
frenchConfig.setLocale(fr);

@NgModule({
  imports: [
    // (...)
    DateFnsModule.forRoot()
  ],
  providers: [
    // (...)
    { provide: DateFnsConfigurationService, useValue: frenchConfig } // <-- All pipes in French by default
  ]
})

It is also possible to change the default locale at runtime:

import { Component } from '@angular/core';
import { DateFnsConfigurationService } from '../lib/src/date-fns-configuration.service';
import { es, de } from 'date-fns/locale';

@Component({
  selector: 'app-root',
  template: `
    <p>{{ dateOne | dfnsFormat: 'MM/dd/yyyy' }}</p>
    <hr />
    Set default locale to: <a href="#" (click)="changeToGerman()">German</a>,
    <a href="#" (click)="changeToSpanish()">Spanish</a>.
  `
})
export class AppComponent {
  dateOne = new Date(2016, 0, 1);
  constructor(public config: DateFnsConfigurationService) {}
  changeToGerman() {
    this.config.setLocale(de);
  }
  changeToSpanish() {
    this.config.setLocale(es);
  }
}

Should I use the pure or impure version of the locale-aware pipes?

The answer is quite simple:

  • Do you set the locale only once when the application starts?
    • Use only pure pipes.
  • Do you need to change the locale at runtime?
    • Use impure pipes.

The main difference is that pure pipes do not get notified when the locale is changed via DateFnsConfiguration.setLocale(locale: Locale), because the instance is not kept in memory. Impure pipes, on the other hand, are kept in memory and listen for Locale change notifications, which adds some memory and performance overhead.

⚠️ There's a range of date-fns versions for which tree shaking is broken, so we recommend that you either install v2.16.1 or >= v2.21.1.

The library itself is optimized to be tree-shakable by just importing DateFnsModule.forRoot() or selectively import pipes by calling them from ngx-date-fns package itself, as those were exported following the SCAM structure, for example:

// app.module.ts
import { fr } from 'date-fns/locale';
import { DateFnsConfigurationService } from 'ngx-date-fns';
import {
  FormatPipeModule,
  MinPipeModule,
  MaxPipeModule,
  FormatDistanceToNowPipeModule,
  WeekdayNamePipeModule,
  ParsePipeModule
} from 'ngx-date-fns';

const frenchConfig = new DateFnsConfigurationService();
frenchConfig.setLocale(fr);

@NgModule({
  // ... other module stuff
  imports: [
    // Selectively import
    FormatPipeModule,
    MinPipeModule,
    MaxPipeModule,
    FormatDistanceToNowPipeModule,
    WeekdayNamePipeModule,
    ParsePipeModule
  ],
  providers: [{ provide: DateFnsConfigurationService, useValue: frenchConfig }]
})
export class AppModule {}

You can test this by downloading this repo and running:

npm run analyze:app

This command will load a file in your browser where you will see that date-fns takes 63Kb, which is significantly less than the 286Kb of the whole library without tree shaking applied. (this, of course, will be much less after gzipping).

Also take into account that locale files tend to increase the final bundle size of date-fns as well.

All pipes are pure unless stated otherwise.

Since v7.0.0 invalid Dates will return an empty string instead of throwing an exception.

A collection of utilities built around date-fns functions.

dfnsWeekdayName

This pipe is (impure)

Given a weekday number, returns its name.

@param WeekdayNameFormat

Optional weekday format. Allowed values are:

  • x1: One char. 'M' for Monday.
  • x2: Two chars. 'Mo' for Monday.
  • x3: Three chars. 'Mon' for Monday.
  • full: Full weekday name. 'Monday' for Monday.

Defaults to full.

@param Locale

Optional date-fns Locale object.

Optional locale object.

Basic example

<div>
  <!-- Prints Monday -->
  {{ 0 | dfnsWeekdayName }}
</div>
<div>
  <!-- Prints Mon -->
  {{ 0 | dfnsWeekdayName : 'x3' }}
</div>

ngx-date-fns's People

Contributors

greenkeeper[bot] avatar joanllenas avatar kingdarboja avatar layzeedk avatar rafaelss95 avatar toverux avatar

Recommend Projects

  • React photo React

    A declarative, efficient, and flexible JavaScript library for building user interfaces.

  • Vue.js photo Vue.js

    🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.

  • Typescript photo Typescript

    TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

  • TensorFlow photo TensorFlow

    An Open Source Machine Learning Framework for Everyone

  • Django photo Django

    The Web framework for perfectionists with deadlines.

  • D3 photo D3

    Bring data to life with SVG, Canvas and HTML. 📊📈🎉

Recommend Topics

  • javascript

    JavaScript (JS) is a lightweight interpreted programming language with first-class functions.

  • web

    Some thing interesting about web. New door for the world.

  • server

    A server is a program made to process requests and deliver data to clients.

  • Machine learning

    Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.

  • Game

    Some thing interesting about game, make everyone happy.

Recommend Org

  • Facebook photo Facebook

    We are working to build community through open source technology. NB: members must have two-factor auth.

  • Microsoft photo Microsoft

    Open source projects and samples from Microsoft.

  • Google photo Google

    Google ❤️ Open Source for everyone.

  • D3 photo D3

    Data-Driven Documents codes.