ngx-bootstrap popover component provides a small overlay component to provide small information about a component.

PopoverDirective

selector

• popover

Inputs

• adaptivePosition − boolean, sets disable adaptive position.

• container − string, A selector specifying the element the popover should be appended to.

• containerClass − string, Css class for popover container

• delay − number, Delay before showing the tooltip

• isOpen − boolean, Returns whether or not the popover is currently being shown

• outsideClick − boolean, Close popover on outside click, default: false

• placement − “top” | “bottom” | “left” | “right” | “auto” | “top left” | “top right” | “right top” | “right bottom” | “bottom right” | “bottom left” | “left bottom” | “left top”, Placement of a popover. Accepts: “top”, “bottom”, “left”, “right”.

• popover − string | TemplateRef<any>, Content to be displayed as popover.

• popoverContext − any, Context to be used if popover is a template.

• popoverTitle − string, Title of a popover.

• triggers − string, Specifies events that should trigger. Supports a space separated list of event names.

Outputs

• onHidden − Emits an event when the popover is hidden.

• onShown − Emits an event when the popover is shown.

Methods

• setAriaDescribedBy() − Set attribute aria-describedBy for element directive and set id for the popover.

• show() − Opens an element”s popover. This is considered a “manual” triggering of the popover.

• hide() − Closes an element”s popover. This is considered a “manual” triggering of the popover.

• toggle() − Toggles an element”s popover. This is considered a “manual” triggering of the popover.

Example

As we”re going to use a popover, We”ve to update app.module.ts used in ngx-bootstrap Pagination chapter to use PopoverModule and PopoverConfig.

Update app.module.ts to use the PopoverModule and PopoverConfig.

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'';
import { CarouselModule } from ''ngx-bootstrap/carousel'';
import { CollapseModule } from ''ngx-bootstrap/collapse'';
import { BsDatepickerModule, BsDatepickerConfig } from ''ngx-bootstrap/datepicker'';
import { BsDropdownModule,BsDropdownConfig } from ''ngx-bootstrap/dropdown'';
import { PaginationModule,PaginationConfig } from ''ngx-bootstrap/pagination'';
import { PopoverModule, PopoverConfig } from ''ngx-bootstrap/popover'';

@NgModule({
   declarations: [
      AppComponent,
      TestComponent
   ],
   imports: [
      BrowserAnimationsModule,
      BrowserModule,
      AccordionModule,
      AlertModule,
      ButtonsModule,
      FormsModule,
      CarouselModule,
      CollapseModule,
      BsDatepickerModule.forRoot(),
      BsDropdownModule,
      ModalModule,
      PaginationModule,
      PopoverModule
   ],
   providers: [AlertConfig, 
      BsDatepickerConfig, 
      BsDropdownConfig,
      BsModalService,
      PaginationConfig],
   bootstrap: [AppComponent]
})
export class AppModule { }

Update test.component.html to use the modal.

test.component.html

<button type="button" class="btn btn-default btn-primary"
   popover="Welcome to Tutorialspoint." [outsideClick]="true">
   Default Popover
</button>
<button type="button" class="btn btn-default btn-primary"
   popover="Welcome to Tutorialspoint."
   popoverTitle="Tutorialspoint" 
   [outsideClick]="true"
   placement="right">
   Right Aligned popover
</button>

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

test.component.ts

import { Component, OnInit } from ''@angular/core'';
import { BsModalService } from ''ngx-bootstrap/modal'';
import { PageChangedEvent } from ''ngx-bootstrap/pagination'';

@Component({
   selector: ''app-test'',
   templateUrl: ''./test.component.html'',
   styleUrls: [''./test.component.css'']
})
export class TestComponent implements OnInit {
   constructor() {}
   ngOnInit(): void {
   }
}

Build and Serve

Run the following command to start the angular server.

ng serve

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