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dt-compare-equal-validator

v0.0.3

Published

這個套件主要可以提供 Angular 7+ 專案使用進行欄位驗證,目前提供的驗證器為 dt-compare-equal-validator,可以用來比對一個 FormGroup 下的兩個欄位內容是否一致,較常見的使用情境是用在註冊會員時「設定密碼」與「確認密碼」欄位的時候。

Downloads

9

Readme

DtCompareEqualValidator

這個套件主要可以提供 Angular 7+ 專案使用進行欄位驗證,目前提供的驗證器為 dt-compare-equal-validator,可以用來比對一個 FormGroup 下的兩個欄位內容是否一致,較常見的使用情境是用在註冊會員時「設定密碼」與「確認密碼」欄位的時候。

安裝套件

npm install dt-compare-equal-validator

Reactive Forms 使用方式

  1. 匯入 compareEqual 函式

    import { compareEqual } from 'dt-compare-equal-validator';
  2. 使用同步驗證器範例

    import { Component, OnInit } from '@angular/core';
    import { compareEqual } from 'dt-compare-equal-validator';
    import { FormBuilder, FormGroup, Validators } from '@angular/forms';
    
    @Component({
      selector: 'app-root',
      templateUrl: './app.component.html',
      styleUrls: ['./app.component.css']
    })
    export class AppComponent implements OnInit {
      form: FormGroup;
      constructor(private fb: FormBuilder) {}
      ngOnInit(): void {
        this.form = this.fb.group({
          pw: ['', [Validators.required]],
          pw2: ['', [Validators.required, compareEqual('pw')]]
        });
      }
    }

Template-driven Forms 使用方式

  1. 匯入 DtCompareEqualValidatorModule 模組到 AppModule

    import { BrowserModule } from '@angular/platform-browser';
    import { NgModule } from '@angular/core';
    
    import { AppRoutingModule } from './app-routing.module';
    import { AppComponent } from './app.component';
    
    import { DtCompareEqualValidatorModule } from 'dt-compare-equal-validator';
    import { FormsModule } from '@angular/forms';
    
    @NgModule({
      declarations: [AppComponent],
      imports: [
        BrowserModule,
        FormsModule,
        AppRoutingModule,
        DtCompareEqualValidatorModule
      ],
      providers: [],
      bootstrap: [AppComponent]
    })
    export class AppModule {}
  2. 直接到 Template 中套用 dtCompareEqual Directive

    由於要比對兩個欄位是否相同,所以在使用 dtCompareEqual 的時候要記得傳入欲比對的欄位名稱 ( name )。例如:dtCompareEqual="pw"

    <form>
      <div>
        輸入密碼:
        <input type="text" name="pw" #tPw="ngModel" [(ngModel)]="pw" required />
      </div>
      <pre>{{ tPw.errors | json }}</pre>
      <div>
        確認密碼:
        <input
          type="text"
          name="pw2"
          #tPw2="ngModel"
          [(ngModel)]="pw2"
          required
          dtCompareEqual="pw"
        />
      </div>
      <pre>{{ tPw2.errors | json }}</pre>
    </form>

使用範例

https://stackblitz.com/edit/dt-compare-equal-validator-sample