Angular PrimeNG KeyFilter Component - GeeksforGeeks

30 Jul, 2021
Angular PrimeNG is an open-source framework with a rich set of native Angular UI components that are used for great styling and this framework is used to make responsive websites with very much ease. In this article, we will know how to use the KeyFilter component in angular primeNG.
KeyFilter component: It is used to set the data type that is to be used for an input field. It also filters other data types from the entered data types.
Properties:
pValidateOnly: The value in the input field is checked against the given regular expression.
Creating Angular Application & Module Installation:
Step 1: Create an Angular application using the following command.ng new appname
ng new appname
Step 2: After creating your project folder i.e. appname, move to it using the following command.cd appname
cd appname
Step 3: Install PrimeNG in your given directory.npm install primeng --save
npm install primeicons --save
npm install primeng --save
npm install primeicons --save
 
Project Structure: It will look like the following.
Example 1: This is the basic example which shows how to use the KeyFilter component 
app.component.html
<h2>GeeksforGeeks</h2><h5>PrimeNG KeyFilter component</h5><div class="p-grid p-fluid">  <div class="p-field p-col-12 p-md-3">    <input type="text" pKeyFilter="int" pInputText />  </div>    <div class="p-field p-col-12 p-md-3">    <input type="text" pKeyFilter="alpha" pInputText />  </div>    <div class="p-field p-col-12 p-md-3">    <input type="text" pKeyFilter="alphanumeric" pInputText />  </div></div>
app.module.ts
import { NgModule } from "@angular/core";import { BrowserModule } from "@angular/platform-browser";import { BrowserAnimationsModule } from     "@angular/platform-browser/animations";  import { AppComponent } from "./app.component";  import { InputTextModule } from "primeng/inputtext";import { KeyFilterModule } from "primeng/keyfilter";  @NgModule({  imports: [    BrowserModule,    BrowserAnimationsModule,    KeyFilterModule,    InputTextModule,  ],  declarations: [AppComponent],  bootstrap: [AppComponent],})export class AppModule {}
Output:
Example 2: In this example, we will know how to use disabled property in keyfilter component 
app.component.html
<h2>GeeksforGeeks</h2><h5>PrimeNG KeyFilter component</h5><div class="p-grid p-fluid">  <div class="p-field p-col-12 p-md-3">    <input type="text" pKeyFilter="int" pInputText disabled />  </div>    <div class="p-field p-col-12 p-md-3">    <input type="text" pKeyFilter="alpha" pInputText disabled />  </div>    <div class="p-field p-col-12 p-md-3">    <input type="text" pKeyFilter="alphanumeric" pInputText disabled />  </div></div>
app.module.ts
import { NgModule } from "@angular/core";import { BrowserModule } from "@angular/platform-browser";import { BrowserAnimationsModule } from     "@angular/platform-browser/animations";  import { AppComponent } from "./app.component";  import { InputTextModule } from "primeng/inputtext";import { KeyFilterModule } from "primeng/keyfilter";  @NgModule({  imports: [    BrowserModule,    BrowserAnimationsModule,    KeyFilterModule,    InputTextModule,  ],  declarations: [AppComponent],  bootstrap: [AppComponent],})export class AppModule {}
Output:
Reference: https://primefaces.org/primeng/showcase/#/keyfilter
Angular-PrimeNG
AngularJS
Web Technologies
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