Ngx-Bootstrap - Buttons

ngx-bootstrap buttons have two specific directives which makes a group of buttons to behave as checkbox or radio buttons or hybrid where a radio button can be unchecked.

ButtonCheckboxDirective

Add checkbox functionapty to any element.

selector

[btnCheckbox]

Inputs

btnCheckboxFalse − boolean, Falsy value, will be set to ngModel, default: false

btnCheckboxTrue − boolean, Truthy value, will be set to ngModel, default: true

ButtonRadioDirective

Create radio buttons or groups of buttons. A value of a selected button is bound to a variable specified via ngModel.

selector

[btnRadio]

Inputs

btnRadio − string, Radio button value, will be set to ngModel

disabled − boolean, If true - radio button is disabled

uncheckable − boolean, If true - radio button can be unchecked

value − string, Current value of radio component or group

ButtonRadioGroupDirective

A group of radio buttons. A value of a selected button is bound to a variable specified via ngModel.

selector

[btnRadioGroup]

Example

As we re going to use buttons, We ve to update app.module.ts used in ngx-bootstrap Alerts chapter to use ButtonsModule. We re also adding support for input controls using FormModule.

Update app.module.ts to use the AlertModule and AlertConfig.

app.module.ts

import { BrowserModule } from  @angular/platform-browser ;
import { NgModule } from  @angular/core ;
import { BrowserAnimationsModule } from  @angular/platform-browser/animations ;
import { AppComponent } from  ./app.component ;
import { TestComponent } from  ./test/test.component ;
import { AccordionModule } from  ngx-bootstrap/accordion ;
import { AlertModule,AlertConfig } from  ngx-bootstrap/alert ;
import { ButtonsModule } from  ngx-bootstrap/buttons ;
import { FormsModule } from  @angular/forms ;
@NgModule({
   declarations: [
      AppComponent,
      TestComponent
   ],
   imports: [
      BrowserAnimationsModule,
      BrowserModule,
      AccordionModule,
      AlertModule,
      ButtonsModule,
      FormsModule
   ],
   providers: [AlertConfig],
   bootstrap: [AppComponent]
})
export class AppModule { }

Update test.component.html to use the buttons.

test.component.html

<button type="button" class="btn btn-primary" (cpck)="cpcked()">
   Single Button
</button>
<pre class="card card-block card-header">
   {{cpckCounter}}
</pre>
<p>Button as Checkbox</p>
<span class="btn-group">
   <label class="btn btn-primary" [(ngModel)]="checkModel.left"
      btnCheckbox tabindex="0" role="button">Left</label>
   <label class="btn btn-primary" [(ngModel)]="checkModel.right"
      btnCheckbox tabindex="0" role="button">Right</label>
</span>
<pre class="card card-block card-header">
   {{checkModel | json}}
</pre>
<p>Button as RadionButton</p>
<span class="form-inpne">
   <span class="btn-group" btnRadioGroup [(ngModel)]="radioModel">
      <label class="btn btn-success" btnRadio="Left">Left</label>
      <label class="btn btn-success" btnRadio="Right">Right</label>
   </span>
</span>
<pre class="card card-block card-header">
   {{radioModel}}
</pre>

Update test.component.ts for corresponding variables and methods.

test.component.ts

import { Component, OnInit } from  @angular/core ;
@Component({
   selector:  app-test ,
   templateUrl:  ./test.component.html ,
   styleUrls: [ ./test.component.css ]
})
export class TestComponent implements OnInit {
   checkModel = { left: false, right: false };
   radioModel =  Left ;
   cpckCounter = 0;
   constructor() { }

   ngOnInit(): void {
   }
   cpcked(): void {
      this.cpckCounter++;
   }
}

Build and Serve

Run the following command to start the angular server.

ng serve

Once server is up and running. Open http://localhost:4200 and verify the following output.