modal window from JavaScript, not opening

modal window from JavaScript, not opening - javascript

I am using Javascript to generate html like this
for (var count = 0; count < data.length; count++) {
var provider = data[count].Provider;
var icon_provider = provider.toLowerCase();
html=html+"some code here";
html = html + "<div class=\"icon\"><i class=\"fa fa-" + icon_provider + "\"></i></div>More info <i class=\"fa fa-arrow-circle-right\"></i></div></div>";
}
I am calling a function called "myFunction" when clicked.
function myFunction() {
$('#myModal').modal('show')
}
all this is in a indexInvoice.js file.
Now i have a index page which has all the scripts.
<!--javascript for the index page-->
<script type="text/javascript" src="js/IndexInvoice.js"></script>
<!--jQuery for modal window from bootstrap-->
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script>
$('#myModal').on('shown.bs.modal', function () {
$('#myInput').focus()
})
</script>
and the div where html is generated through javascript(from indexInvoice.js) is this.
<div id="row1" class="row">
<!--Modal window-->
<div class="modal fade" data-target="#myModal" 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-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="myModalLabel">Modal title</h4>
</div>
<div class="modal-body">
this is modal window
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>
</div><!-- /.row -->
The div has a std modal window code from bootstrap.
Now the Issue is when I click the that element, I am not able to get the modal window. Although when a put a alert in myFunction it shows the alert.

it should be $('#myModal').modal("show"); check the double quotes

Related

passing values to bootstrap modal

I am trying to pass values to my modal in html using JQUERY.
I have this:
<a class="dropdown-item" href="javascript:void(0);" data-toggle="modal" data-target="#clientStatus" data-clientCurrentStatus="inactive">Change Client Status</a>
<script>
$(function() {
$('#clientStatus').on('show.bs.modal', function(event) {
var button = $(event.relatedTarget); // Button that triggered the modal
var clientCurrentStatus = button.data('clientCurrentStatus'); // Extract info from data-* attributes
// If necessary, you could initiate an AJAX request here (and then do the updating in a callback).
// Update the modal's content. We'll use jQuery here, but you could use a data binding library or other methods instead.
var modal = $(this);
modal.find('#clientCurrentStatus').val(clientCurrentStatus);
});
});
</script>
and what I am trying to do is inside data-clientCurrentStatus i am passing the value. and then inside my modal I have this:
<div class="modal fade" id="clientStatus" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabelLogout"
aria-hidden="true">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="exampleModalLabelLogout">Update Client Status</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
<p>Current Status:</p>
<input type="text" name="clientCurrentStatus" id="clientCurrentStatus">
</div>
<div class="modal-footer">
<button type="button" class="btn btn-outline-primary" data-dismiss="modal">Cancel</button>
Logout
</div>
</div>
</div>
</div>
so as you can see, the id matches, and everything matches. I am not sure why it isn't working. I am importing the jquery tag like this:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
but nothing is working. how can i fix this?

I think there are some issues with what you can use for attribute names:
http://html5doctor.com/html5-custom-data-attributes/
$(function() {
$('#clientStatus').on('show.bs.modal', function(event) {
var button = $(event.relatedTarget);
var client_current_status = button.data('client_current_status');
var modal = $(this);
modal.find('#clientCurrentStatus').val(client_current_status);
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap#5.1.3/dist/css/bootstrap.min.css">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<div class="modal fade" id="clientStatus" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabelLogout"
aria-hidden="true">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="exampleModalLabelLogout">Update Client Status</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
<p>Current Status:</p>
<input type="text" name="clientCurrentStatus" id="clientCurrentStatus">
</div>
<div class="modal-footer">
<button type="button" class="btn btn-outline-primary" data-dismiss="modal">Cancel</button>
Logout
</div>
</div>
</div>
</div>
<button type = "button" class="btn btn-primary" data-toggle="modal" data-target="#clientStatus" data-client_current_status="inactive">Change Client Status</button>

Add class to the body when modal is open

I'm having a problem with my login modals. One modal open when someone click forgot password link on my sign in the modal. (One modal open in another modal) So I came everything clean by adding all necessary attributes.
Eg:
<span data-toggle="modal" data-target="#forgot-pin-popup" data-dismiss="modal">Forgot password?</span>
But I notice it won't add .modal-open class to the body when my second modal is open(styles are shown weird without this class). So I manually use this js script.
$('.modal').on('hidden.bs.modal', function () {
if($('.modal').hasClass('in')) {
$('body').addClass('modal-open');
}
});
Works perfectly BUT when I try switching models like 6 times. It won't work again. Can't imagine why. I can't show you an example because it's on my production site. Does anyone face the similar problem like this?

Try to do using modal id
On modal show
$('#forgot-pin-popup').on("shown.bs.modal", function() {
$("body").addClass("modal-open");
});
On modal hide
$('#forgot-pin-popup').on("hide.bs.modal", function() {
$("body").addClass("modal-open");
});

what about using a global event listeners:
$(document).on('hidden.bs.modal', '.modal', function () {
$('body').toggleClass('modal-open', $('.modal').hasClass('in'));
});

Try to use body instead of .modal
$('body').on('hidden.bs.modal', function() {
if ($('.modal.in').length) {
$('body').addClass('modal-open');
}
});
Also make sure that your modal should not be nested into .modal class
$('body').on('hidden.bs.modal', function() {
if ($('.modal.in').length) {
$('body').addClass('modal-open');
}
});
$(".btn-primary").on("click", function() {
console.log($("body").attr("class"));
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<!-- Button trigger modal -->
<button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
Open modal
</button>
<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="myModalLabel">Modal title</h4>
</div>
<div class="modal-body">
...
</div>
<div class="modal-footer">
<button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal1" data-dismiss="modal">
Open modal
</button>
</div>
</div>
</div>
</div>
<!-- Modal1 -->
<div class="modal fade" id="myModal1" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="myModalLabel">Modal title</h4>
</div>
<div class="modal-body">
...
</div>
<div class="modal-footer">
<button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>

e.preventDefault is not working while openning A modal after changing modal-text. modal is openning without changing content

I am trying to change the modal-body text when modal trigger button is clicked . But modal is openning but modal-body text is not changing .
This is the code for modal
<button type="button" class="btn btn-info open-modal" data-remote="false" data-toggle="modal" data-target="#myModal">Register</button>
<!-- Modal -->
<div id="myModal" class="modal fade" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<p>Some text in the modal.</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
Then source for preventing default event
$('.open-modal').click(function(e)
{
e.preventDefault();
alert('hello i am jquery');
$('#myModal').modal('show');
});
Why alert('hello i am jquery'); line is not executing ?

This may happen when your HTML takes precedence over jquery since your button specifes the target modal to open with the following attributes
data-remote="false" data-toggle="modal" data-target="#myModal"
Remove those and then the jquery will be fine
$('.open-modal').click(function(e)
{
e.preventDefault();
alert('hello i am jquery');
$('#myModal').modal('show');
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<button type="button" class="btn btn-info open-modal" >Register</button>
<!-- Modal -->
<div id="myModal" class="modal fade" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<p>Some text in the modal.</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>

To trigger a modal to show programmatically, you can use the following:
$('#myModal').modal('show');
You can also have an event handler being triggered and add your code in there:
$('#myModal').on('shown', function() {
alert('hello i am jquery');
})

In my case: Below code worked properly if the case fails:
$('#myModal').modal({show: 'false'});

How to dynamically change bootstrap modal body

So I have Bootstrap modal defined as:
<div class="modal fade" id="myModal" role="dialog">
<div class="modal-dialog modal-sm">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Error</h4>
</div>
<div class="modal-body">
<p> </p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
And I want to edit the empty body with jscript. Im a beginner in Javascript so I'll appreciate the simplest answer.

Please have a look at this fiddle.
Here is the code:
$(function(){
$('.custom-modal').click(function(e){
e.preventDefault();
var mymodal = $('#myModal');
mymodal.find('.modal-body').text('hello');
mymodal.modal('show');
});
})

Try this one:
$('.modalShow').click(function(event){
event.preventDefault();
var e = $(this);
var title = e.data('title');
var body = e.data('value');
$('.modal-title').html(title);
$('.modal-body').html(body);
$('#myModal').modal('show');
});

the simplest solution is - you can use javascript's innerHTML to change html of your modal body like this -
//get your modal body by class and change its html
document.getElementByClass("modal-body").innerHTML = "<p>some text</p>";

I have done this in C# as follows.
C# :
System.Text.StringBuilder stringBuilder = new System.Text.StringBuilder();
stringBuilder.Append(#"<script language='javascript'>");
stringBuilder.Append(#"$('#errorModal').find('.modal-body').text('"+ your error message + "');");
stringBuilder.Append(#"$('#errorModal').modal('show');");
stringBuilder.Append(#"</script>");
ClientScript.RegisterStartupScript(this.GetType(), "JSScript", stringBuilder.ToString());
HTML :
<div class="modal fade" id="errorModal" role="dialog">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal title</h4>
</div>
<div class="modal-body">
<p> </p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>

Launch Bootstrap Modal on Page Load

I don't know JavaScript at all. The Bootstrap documentation says to
Call the modal via JavaScript: $('#myModal').modal(options)
I have no clue how to call this on a page load. Using the supplied code on the Bootstrap page I can successfully call the Modal on an element click, but I want it to load immediately on a page load.

Just wrap the modal you want to call on page load inside a jQuery load event on the head section of your document and it should popup, like so:
JS
<script type="text/javascript">
$(window).on('load', function() {
$('#myModal').modal('show');
});
</script>
HTML
<div class="modal hide fade" id="myModal">
<div class="modal-header">
<a class="close" data-dismiss="modal">×</a>
<h3>Modal header</h3>
</div>
<div class="modal-body">
<p>One fine body…</p>
</div>
<div class="modal-footer">
Close
Save changes
</div>
</div>
You can still call the modal within your page with by calling it with a link like so:
<a class="btn" data-toggle="modal" href="#myModal">Launch Modal</a>

You don't need javascript to show modal
The simplest way is replace "hide" by "in"
class="modal fade hide"
so
class="modal fade in"
and you need add onclick = "$('.modal').hide()" on button close;
PS: I think the best way is add jQuery script:
$('.modal').modal('show');

Just add the following-
class="modal show"
Working Example-
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<div class="container">
<!-- Trigger the modal with a button -->
<button type="button" class="btn btn-info btn-lg" data-toggle="modal" data-target="#myModal">Open Modal</button>
<!-- Modal -->
<div class="modal show" id="myModal" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<p>Some text in the modal.</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
</div>

You can try this runnable code-
$(window).load(function()
{
$('#myModal').modal('show');
});
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<div class="container">
<!-- Trigger the modal with a button -->
<button type="button" class="btn btn-info btn-lg" data-toggle="modal" data-target="#myModal">Open Modal</button>
<!-- Modal -->
<div class="modal fade" id="myModal" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<p>Some text in the modal.</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
</div>
More can be found here.
Think u have your complete answer.

Update 2021
Bootstrap 5
Now that Bootstrap no longer requires jQuery, it's easy to show the modal using JavaScript..
var myModal = new bootstrap.Modal(document.getElementById('myModal'), {})
myModal.toggle()
Demo
Bootstrap 4
The modal markup has changed slightly for Bootstrap 4. Here's how you can open the modal on page load, and optionally delay display of the modal...
$(window).on('load',function(){
var delayMs = 1500; // delay in milliseconds
setTimeout(function(){
$('#myModal').modal('show');
}, delayMs);
});
<div class="modal fade" id="myModal">
<div class="modal-dialog modal-lg modal-dialog-centered" role="document">
<div class="modal-content">
<div class="modal-header">
<h4 class="modal-title">My Modal</h4>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
...
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary mx-auto" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
Demo

regarding what Andre's Ilich say you have to add
the js script
after the line in what you call the jquery:
<script src="//ajax.aspnetcdn.com/ajax/jQuery/jquery-2.1.1.js" type="text/javascript"></script>
<script type="text/javascript">
$(window).load(function(){
$('#myModal').modal('show');
});
</script>
in my case that was the problem hope it helps

Tested with Bootstrap 3 and jQuery (2.2 and 2.3)
$(window).on('load',function(){
$('#myModal').modal('show');
});
<!-- Modal -->
<div class="modal fade" id="myModal" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title"><i class="fa fa-exclamation-circle"></i> //Your modal Title</h4>
</div>
<div class="modal-body">
//Your modal Content
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Fechar</button>
</div>
</div>
</div>
</div>
https://jsfiddle.net/d7utnsbm/

In my case adding jQuery to display the modal didn't work:
$(document).ready(function() {
$('#myModal').modal('show');
});
Which seemed to be because the modal had attribute aria-hidden="true":
<div class="modal fade" aria-hidden="true" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
Removing that attribute was needed as well as the jQuery above:
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
Note that I tried changing the modal classes from modal fade to modal fade in, and that didn't work. Also, changing the classes from modal fade to modal show stopped the modal from being able to be closed.

You can activate the modal without writing any JavaScript simply via data attributes.
The option "show" set to true shows the modal when initialized:
<div class="modal fade" tabindex="-1" role="dialog" data-show="true"></div>

Heres a solution [without javascript initialization!]
I couldn't find an example without initializing your modal with javascript, $('#myModal').modal('show'), so heres a suggestion on how you could implement it without javascript delay on page load.
Edit your modal container div with class and style:
<div class="modal in" id="MyModal" tabindex="-1" role="dialog" style="display: block; padding-right: 17px;">
Edit your body with class and style:
<body class="modal-open" style="padding-right:17px;">
Add modal-backdrop div
<div class="modal-backdrop in"></div>
Add script
$(document).ready(function() {
$('body').css('padding-right', '0px');
$('body').removeClass('modal-open');
$('.modal-backdrop').remove();
$('#MyModal').modal('show'); });
What will happen is that the html for your modal will be loaded on page load without any javascript, (no delay). At this point you can't close the modal, so that is why we have the document.ready script, to load the modal properly when everything is loaded. We will actually remove the custom code and then initialize the modal, (again), with the .modal('show').

Like others have mentioned, create your modal with display:block
<div class="modal in" tabindex="-1" role="dialog" style="display:block">
...
Place the backdrop anywhere on your page, it does not necesarily need to be at the bottom of the page
<div class="modal-backdrop fade show"></div>
Then, to be able to close the dialog again, add this
<script>
$("button[data-dismiss=modal]").click(function () {
$(".modal.in").removeClass("in").addClass("fade").hide();
$(".modal-backdrop").remove();
});
</script>
Hope this helps

In addition to user2545728 and Reft answers, without javascript but with the modal-backdrop in
3 things to add
a div with the classes modal-backdrop in before the .modal class
style="display:block;" to the .modal class
fade in together with the .modal class
Example
<div class="modal-backdrop in"></div>
<div class="modal fade in" tabindex="-1" role="dialog" aria-labelledby="channelModal" style="display:block;">
<div class="modal-dialog modal-lg" role="document">
<div class="modal-content">
<div class="modal-header">
<h4 class="modal-title" id="channelModal">Welcome!</h4>
</div>
<div class="modal-body" style="height:350px;">
How did you find us?
</div>
</div>
</div>
</div>

<div id="ModalStart" class="modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-body">
<p><i class="icon-spinner icon-spin icon-4x"></i></p>
</div>
</div>
You can show it on start even without Javascript. Just delete the class "hide".
class="Modal"

Update 2020 - Bootstrap 5
Building on the excellent responses from previous answers, in Bootstrap 5 with no jQuery, this has worked;
document.querySelector('[data-target="#exampleModal"]').click();
Full snippet:
window.onload = () => {
document.querySelector('[data-target="#exampleModal"]').click();
}
<script src="https://stackpath.bootstrapcdn.com/bootstrap/5.0.0-alpha1/js/bootstrap.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js#1.16.0/dist/umd/popper.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/5.0.0-alpha1/css/bootstrap.min.css" rel="stylesheet" />
<div class="container py-3">
<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
Launch demo modal
</button>
<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
...
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>
</div>

In bootstrap 3 you just need to initialise the modal through js and if in the moment of the page load the modal markup is in the page the modal will show up.
In case you want to prevent this, use the option show: false where you initialise the modal. Something like this:
$('.modal').modal({ show: false })

you can using jQuery to handle this
first import on your template
<script src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
and hit the id on your modal with jQuery Script
<script type="text/javascript">
$(window).on('load', function() {
$('#staticBackdrop').modal('show');
});
</script>
here is the modal for case display django message
{% if messages %}
{% for message in messages %}
<div class="modal fade" id="staticBackdrop" data-bs-backdrop="static" data-bs-keyboard="false" tabindex="-1" aria-labelledby="staticBackdropLabel" aria-hidden="false">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="staticBackdropLabel">Message</h5>
<button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
</div>
<div class="modal-body">
{{ message }}
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
{% endfor %}
{% endif %}

You may want to keep jquery.js deferred for faster page load. However, if jquery.js is deferred the $(window).load may not work. Then you may try
setTimeout(function(){$('#myModal').modal('show');},3000);
it will popup your modal after page is completely loaded (including jquery)

In order to avoid bootstrap being overruled and loosing it´s funcionality, simply create a regular launch button, provide it with an Id, and 'click it' using jquery, like so:
The launch button:
<button type="button" id="btnAnouncement" class="btn btn-primary" data-toggle="modal" data-target="#modalAnouncement">
See what´s new!
</button>
The jQuery trigger:
$(document).ready(function () {
$('#btnAnouncement').click();
)}
Hope it helps. Cheers!

I recently needed to launch a Bootstrap 5 modal without jQuery and not with a button click (eg, on page load) using Django messages. This is how I did it:
Template/HTML
<div class="modal" id="notification">
<div class="modal-dialog modal-dialog-centered">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title">Notification!</h5>
<button type="button" class="btn-close"
data-bs-dismiss="modal" aria-label="Close"></button>
</div>
<div class="modal-body">
{% for m in messages %}
{{ m }}
{% endfor %}
</div>
<div class="modal-footer justify-content-between">
<a class="float-none btn btn-secondary" href="{% url 'some_view' %}"
type="button">
Link/Button A
</a>
<button type="button" class="btn btn-primary"
data-bs-dismiss="modal">
Link/Button B
</button>
</div>
</div>
</div>
</div>
JS in a file or in the template
{% block javascript %}
{{ block.super }}
<script>
var test_modal = new bootstrap.Modal(
document.getElementById('notification')
)
test_modal.show()
</script>
{% endblock javascript %}
This method will work without the Django template; just use the HTML and put the JS in a file or script elements that loads after the Bootstrap JS before the end of the body element.

maybe it's late but, once I was not able to solve this order issue, and modal was not getting shown; I used jquery click();
I tried this and it worked well :)
create a button, which calls Modal show > style that button as display : none;
Example :
$( "#clickme" ).click();
<html>
<head>
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
</head>
<body>
<input type="button" value="0" id="clickme" style="display:none;" data-toggle="modal" data-target="#exampleModal" />
<!-- Modal -->
<div id="exampleModal" class="modal" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Clicked Successfully</h4>
</div>
<div class="modal-body">
<p>Some text in the modal.</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
</body></html>

In JS:
<script>
$(document).ready(function(){
$("#myModal").modal('show');
});
</script>
Boostrap Modal in HTML:
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Alert</h4>
</div>
<div class="modal-body">
<p><?= session('msg') ?></p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
replace myModal with your's

We Keep Coding

JavaScript is the programming language of the Web.

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it should be $('#myModal').modal("show"); check the double quotes

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