The Angular 6 ngb-bootstrap modal fails to display due to conflicting bootstrap css within a div element

I've encountered numerous inquiries about modal not displaying, and although I've successfully implemented it in other scenarios, this one presents a unique challenge!

In my Wordpress project, I've embedded an Angular app within the admin area. The app utilizes Bootstrap 4. To prevent the Bootstrap 4 CSS from affecting the Wordpress admin interface when the Angular app loads, I devised a technique. I wrapped the app in a div with the class="bootstrap" and utilized less to encapsulate all Bootstrap styles within the .bootstrap class. This ensures that classes like .text-danger are written as .bootstrap .text-danger, effectively isolating the Angular app without impacting the admin interface.

However, I encountered an issue when attempting to integrate ngb-modal into the mix! The modal and its backdrop elements are added directly before the body tag, outside of the Bootstrap wrapper div. As a result, the isolated CSS does not apply to these elements.

Is there a way to incorporate a wrapping div element when calling the modal, like so: 

<div class="bootstrap">...ngb-modal code here...</div>
?

const modalRef = this.modalService.open(MyModalComponent);

I hope I've articulated the issue effectively!

cssangularwordpressbootstrap-4ng-bootstrap

Answer №1

I have finally discovered the solution!

To display the modal correctly, it is necessary to call it using the following method:

// Set up modal options
const modalOptions: NgbModalOptions = {
    container: '#id_my_bootstrap_container'
};

// Display the modal
const modalRef = this.modalService.open(MyModalComponent, modalOptions);

Make sure to specify the id for the div:

<div class="bootstrap" id="id_my_bootstrap_container">...ngb-modal code here...</div>

By following these steps, the modal will be generated within the specified div, allowing the modal CSS to be applied correctly even when prefixed with the bootstrap class.

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