ngx-age-validator - Angular custom validator to validate a given age using momentjs

We assume the following example: minimum age: 18 years old - maximum age 40 years old

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Table of Contents

• Demo
• Dependencies
• Installation
• Usage
• Run Demo App Locally
• Other Angular Libraries
• Support
• License

Demo

Library's validator

• NgxAgeValidator used to validate the age for a given date

Dependencies

• Angular developed and tested with 10.x

Installation

npm i -s ngx-age-validator

API

Errors

tooJung if the min argument > as the difference between the given date and today tooOld if the min argument < as the difference between the given date and today

Usage

Use the library with reactive forms

<mat-form-field appearance="outline">
      <mat-label>Choose a date</mat-label>
      <input matInput [matDatepicker]="picker" [formControl]="ageFormControl">
      <mat-datepicker-toggle matSuffix [for]="picker"></mat-datepicker-toggle>
      <mat-datepicker #picker></mat-datepicker>
      <mat-error>Error</mat-error>
      <mat-error *ngIf="ageFormControl.hasError('tooJung')">You are too jung!</mat-error>
      <mat-error *ngIf="ageFormControl.hasError('tooOld')">You are too old!</mat-error>
</mat-form-field>

import {Component, OnInit} from '@angular/core';
import {FormControl, ValidationErrors} from "@angular/forms";
import {NgxAgeValidator} from "ngx-age-validator";

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent implements OnInit {

  title = 'ngx-age-validator-demo';

  ageFormControl = new FormControl();

  ngOnInit(): void {
    this.ageFormControl = new FormControl(null, [NgxAgeValidator(18, 40)])

    this.ageFormControl.valueChanges.subscribe(() => {

      const controlErrors: ValidationErrors | null = this.ageFormControl.errors;
      if (controlErrors != null) {
        Object.keys(controlErrors).forEach(keyError => {
          console.log(' keyError: ' + keyError + ', err value: ', controlErrors[keyError]);
        });
      }

    })
  }

}

Run Demo App Locally

Build the library

$ npm run build:lib

Serve the demo app

$ npm start

Other Angular Libraries

• ngx-auth-firebaseui
• ngx-linkifyjs
• @angular-material-extensions/password-strength
• @angular-material-extensions/google-maps-autocomplete
• @angular-material-extensions/link-preview
• @angular-material-extensions/select-country
• @angular-material-extensions/fab-menu
• @angular-material-extensions/pages
• @angular-material-extensions/contacts

Support

• Drop an email to: Anthony Nahas
• or open an appropriate issue
• let us chat on Gitter

Built by and for developers :heart: we will help you :punch:

This project is supported by jetbrains with 1 ALL PRODUCTS PACK OS LICENSE incl. webstorm

License

Copyright (c) 2020 Anthony Nahas. Licensed under the MIT License (MIT)