Bootstrap modal onload event

Question

Does a bootstrap modal have an onload event? I want to call a http GET request when the modal is opened to populate the modal with data from a rest api. I have a form in the modal and I have called the GET function on the onload event of the form, but it doesn't work.

<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button> <h4 class="modal-title" id="myModalLabel">Agent details:</h4> </div> <div class="modal-body"> <form onload="getData()" style= "font-size: 16pt">

Please, read the documentation thoroughly before asking questions here. It's not that we don't want to help, it's just that we want you to try to do it yourself first. — Blazemonger
– Blazemonger, Commented Nov 21, 2013 at 14:41

Community · Accepted Answer · 2020-06-20 09:12:55Z

Per the documentation, you can listen to the show or shown events.

From The Documentation:

show.bs.modal => This event fires immediately when the show instance method is called.

shown.bs.modal => This event is fired when the modal has been made visible to the user (will wait for CSS transitions to complete).

$('#myModal').on('show.bs.modal', function () { // do something… })

lbecker34 · Accepted Answer · 2015-08-14 16:02:14Z

What I've found to be the best way to do this is to add the onclick attribute to the html element that calls the modal.

<button type="button" onclick="PopulateAddModal()" class="btn btn-sm btn-primary" data-toggle="modal" data-target="#AddModal">Add</button>

Then in your javascript..

 function PopulateAddModal() { //do stuff here... }

This will ensure that your code is ran as soon as the modal is called. Otherwise, the javascript code will not run until the modal has completely finished it's "fade-in" animation.

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