ng-bootstrap vs ngx-bootstrap — Which to Use in 2026

If you're building an Angular app with Bootstrap 5, you'll eventually ask this question. Here's the direct answer.

Short Answer

Use ng-bootstrap. It's better maintained, has a cleaner API, and updates faster for new Angular versions.

That said, the choice only matters if you actually need Angular-native Bootstrap components. For most projects you don't.

When You Don't Need Either

For a basic Bootstrap Angular app, you don't need ng-bootstrap or ngx-bootstrap. Add Bootstrap CSS and JS to angular.json:

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"styles": ["node_modules/bootstrap/dist/css/bootstrap.min.css"],
"scripts": ["node_modules/bootstrap/dist/js/bootstrap.bundle.min.js"]

Bootstrap's data-attribute components (modals, dropdowns, collapse) work fine with Angular. You can open modals with new bootstrap.Modal(el).show() from Angular code. This covers 80% of use cases.

You only need ng-bootstrap or ngx-bootstrap when you need deeper Angular integration:

• Date pickers with reactive forms
• Typeahead/autocomplete
• Modals with Angular component injection
• Tooltips on dynamically created elements
• Proper accessibility with Angular's CDK overlay

ng-bootstrap vs ngx-bootstrap

ng-bootstrap API Example

ng-bootstrap's API feels like Angular:

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// Open a modal with ng-bootstrap
import { NgbModal } from '@ng-bootstrap/ng-bootstrap'

@Component({ standalone: true, imports: [NgbModal] })
export class MyComponent {
  constructor(private modal: NgbModal) {}

  open() {
    const ref = this.modal.open(MyModalComponent, {
      size: 'lg',
      centered: true
    })

    ref.result.then(result => {
      console.log('Closed with:', result)
    }).catch(() => {
      console.log('Dismissed')
    })
  }
}

The modal component is a real Angular component — reactive forms, dependency injection, proper lifecycle — injected into the modal by ng-bootstrap.

ngx-bootstrap API Example

ngx-bootstrap is more verbose:

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import { BsModalService, BsModalRef } from 'ngx-bootstrap/modal'

@Component({})
export class MyComponent {
  modalRef?: BsModalRef

  constructor(private modalService: BsModalService) {}

  open() {
    this.modalRef = this.modalService.show(MyModalComponent, {
      class: 'modal-lg'
    })

    this.modalRef.content.event.subscribe(result => {
      console.log('Result:', result)
    })
  }
}

Both work. ng-bootstrap's API is closer to Angular patterns — Promises and observables vs ngx-bootstrap's event emitter approach.

What ng-bootstrap Does Well

• Date picker — the best Bootstrap date picker for Angular, handles reactive forms natively
• Typeahead — search-as-you-type with Observable support
• Popover/Tooltip — works correctly on dynamically created elements
• Datatable — pagination component that pairs with Angular's pipe filtering

What ngx-bootstrap Has That ng-bootstrap Doesn't

• More component variety (timepicker, sortable, rating, etc)
• If you need a specific component ng-bootstrap doesn't have, ngx-bootstrap might

My Recommendation

For Angular 21 projects:

1. First — try just Bootstrap CSS + JS (no extra library). It covers most cases.
2. If you need date pickers, typeahead or complex modals — add ng-bootstrap.
3. Only consider ngx-bootstrap — if ng-bootstrap is missing a specific component you need.

Don't add either library speculatively. Add it when you hit a specific limitation with plain Bootstrap JS.