copy a modal but change the text and images - javascript

I have a lot of modal on my site and I don't want to copy paste my code everytime just to change text and images.( all the rest of the modal stays the same).Would be appreciated if someone help me achieve that!
so I have this modaleTemplate i'd like to copy everytime, and then I want to change the following:
-modalImage1
-modalImage2
-modalImage3
-modalTitle
-modalText
<!----------------->
<!--- PROJECTS 1 -->
<!----------------->
<section class="section-full">
<div class="container-full">
<div class="portfolio logo" data-toggle="modal" data-target="#modalProject-1" id="project-1">
<div class="portfolio-wrapper">
<img src="img/portfolio/logo/5.jpg"/>
</div>
</div>
</div>
</section>
<!------------------->
<!-------- MODAL 1 -->
<!------------------->
<!-- Modal Project Template -->
<div class="modal fade" id="modalProject-1" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog" role="document">
<div class="modal-content">
<!--modal body-->
<div class="modal-body">
<div class="container-fluid">
<div class="row">
<!--modal image-->
<div class="col-sm-6">
<img id="modalImage1"/>
<img id="modalImage2"/>
<img id="modalImage3"/>
</div>
<!--modal text-->
<div class="col-sm-6">
<h2 id="modalTitle"></h2>
<p id="modalText"></p>
</div>
</div>
</div>
</div><!--modal body-->
</div><!--modal-content-->
</div><!--modal-dialog-->
</div>
<!--------------------->
<!-- modal project 1 -->
<!--------------------->
<script>
$('#project-1').click(function(){
function setModal(modalImage1, modalImage2, modalImage3, modalTitle, modalText){
$('#modalImage1').attr('src','img/portfolio/logo/1.jpg');
$('#modalImage2').attr('src','img/portfolio/logo/2.jpg');
$('#modalImage3').attr('src','img/portfolio/logo/3.jpg');
$('#modalTitle').text('some title');
$('#modalText').text( 'some text' );
};
});
</script>


You can use jQuery (or vanilla javascript) to change the values of DOM when opening the modal.
Remove the <script> tags that you have placed in the modal give id (or class) to elements that you set the value to on the open-event.
To change src of an image in jQuery you can use $('#ID-of-img').attr('src','path-here');.
To change the text of a header or paragraph (or whatever) in jQuery you can use $('#ID-of-element').text('place text here');.
In your case I would use something like this.
<div class="col-sm-6">
<div class="spacer-sm hidden-sm-up"></div>
<h2 id="modalTitleDef"></h2>
<p><span id="modalText1Def"></span><br><br><span id="modalText2Def"></span></p>
<br>
<button type="button" class="btn btn-primary btn-md" data-dismiss="modal">Close Project</button>
</div>
</div>
</div>
<!-- project1 = COPY ALL modalTemplate but CHANGE the images and text-->
<script>
function setModal(modalImage1Def, modalImage2Def, modalImage3Def, modalTitle, modalText1, modalText2){
$('#modalImage1Def').attr('src',modalImage1Def);
$('#modalImage2Def').attr('src',modalImage2Def);
$('#modalImage3Def').attr('src',modalImage3Def);
$('#modalTitleDef').text(modalTitle);
$('#modalText1Def').text(modalText1);
$('#modalText2Def').text(modalText2);
}
</script>


It's a lot simpler than you may realize.
Especially when using the excellent Bootstrap modals, the modal is just a DIV structure that is initially hidden, and then displayed. It is styled using position:absolute or position:fixed to put it overtop of the page, and that adds to its mystique. But it is nothing more than a simple DIV structure.
So, how do you programmatically change the contents of a normal div? Usually, we use jQuery .html() -- and that's how you can have one modal structure and change the contents as desired.
Usually, you only need to have one modal structure on the page, and then every time you wish to display info in a modal you change the contents of that structure and re-display the updated modal.
Example:
$('#changeit').click(function(){
$('.modal-header').html('New header title');
$('.modal-body').html('\
<div class="col-xs-4">\
<img src="http://placeimg.com/200/150/animals" >\
</div>\
<div class="col-xs-8">\
Here is some new content. Here is some new content. Here is some new content. Here is some new content. Here is some new content. Here is some new content. Here is some new content. \
</div>');
alert('Modal has been changed. Click OPEN MODAL again to see');
//$('#btnOpenModal').click(); //This will force re-open the modal, if desired
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/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"/>
<!-- Trigger the modal with a button -->
<button id="btnOpenModal" type="button" class="btn btn-info btn-lg" data-toggle="modal" data-target="#myModal">Open Modal</button>
<!-- Simple Modal, from http://www.w3schools.com/bootstrap/bootstrap_modal.asp -->
<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>
<button id="changeit">Change Modal Contents</button>


Your situation is the exact example for using template, you have some HTML need to be rendered in different places and variables to change, Please check JavaScript templates

Related

How to Create Multiple Modal Dynamically in a Single Page

I am doing a Django Blog Project and it fetch all Blogs from the Database and show Blog Title in User Profile only. I want to create Bootstrap Modal for each Blog that is shown in the profile. Whenever a User click on a Title, the Modal will appear with Details.
{% for blog in blogs.all %}
<div class="card mb-4 shadow-sm ">
<p class="card-text "><h2>{{ blog.title }}</h2></p>
<div class="card-body">
<div class="btn-group">
<!-- Open a Modal for the blog -->
<!-- Button To Implement the Modal-->
<button id = "modalToggle" type="button" class="btn btn-sm btn-outline-secondary" data-toggle="modal" data-target="#modal">View More</button>
<!-- Modal -->
<div class="modal fade" id="modal" role="dialog">
<div class="modal-dialog modal-lg">
<div class="modal-content">
<div class="modal-header">
<h4 class="modal-title">{{ blog.title }}</h4>
</div>
<div class="modal-body">
<p>{{ blog.body }}</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
Here all Blogs are showing the Modal of the first one. I cannot create multiple modals for each Blog.

The id attribute of an html element should be unique and appear only on one element in the html document. The problem you're encountering is likely because you're creating an element with id="modal" for each blog. You can fix this with:
<button id = "modalToggle" type="button" class="btn btn-sm btn-outline-secondary"
data-toggle="modal" data-target="#modal-blog-{{blog.pk}}">View More</button>
<!-- Modal -->
<div class="modal fade" id="modal-blog-{{blog.pk}}" role="dialog">
By using a unique string for the id via including the blog pk the buttons should trigger their respective blog.

Passing a link to bootstrap modal window with a iframe

I have a table where each row has a link to edit the data for that record. The link will be in the following format -> modal_edit.php?id=2
On clicking the link it should open the link in an iframe which is located inside a bootstrap-4 modal window.
I am not sure how to achieve this. I have tried searching for a solution but those did not help.
Here is my code for the link:
<td><center><i class="fas fa-edit"></i></center></td>
And code for modal:
<div class="modal fade" id="myModal">
<div class="modal-dialog modal-lg modal-dialog-centered">
<div class="modal-content">
<!-- Modal Header -->
<div class="modal-header">
<h4 class="modal-title">Modal Heading</h4>
<button type="button" class="close" data-dismiss="modal">×</button>
</div>
<!-- Modal body -->
<div class="modal-body">
<iframe src="modal_edit.php" width="600" height="380" frameborder="0" allowtransparency="true"></iframe>
</div>
<!-- Modal footer -->
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
</div>
</div>
</div>
I have also tried sending the link using data-id and updating the src but it didn't seem to work. I am fairly new to coding and any help in this regard will be appreciated.

<td>
<center><i class="fas fa-edit"></i></center>
</td>
$(document).ready(function() {
$(".showModal").click(function(e) {
e.preventDefault();
var url = $(this).attr("data-href");
$("#myModal iframe").attr("src", url);
$("#myModal").modal("show");
});
});
You can use set the src of an iframe on click of the a tag. Get the value from data-href , set the src of an iframe and then show the modal window.

How to display different content on a modal based on data-binding attribute? (knockout.js + bootstrap modal)

What I want to do is, I want to display a modal when I click the "Preview Application" link based on the data-binding of the link.
For example,
<a href="#" data-toggle="modal" data-target="#previewApplicantModal" data-bind="attr: { 'data-applicationKey': application.applicationKey }">
Preview Application
</a>
When I do this, it binds to the corresponding applicationKey. So, I want to use this information to display the corresponding candidateLocation on the modal based on the applicationKey.
How can I do this?
To rephrase my question,
How can I make the modal read the applicationKey and display the candidateLocation that is inside the same "application" object as that applicationKey?
The code for my empty modal currently looks like this:
<div id="previewApplicantModal" class="modal fade" tabindex="-1">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button>
<h4 class="modal-title" id="myModalLabel">Applicant Preview</h4>
</div>
<div class="modal-body">
<div class="row">
<div class="col-md-6">
<span>Applicant Responses</span>
</div>
<div class="col-md-6">
<div>
</div>
</div>
</div>
<div class="row small-margin-top" style="text-align:center">
Read Full Profile
</div>
</div>
</div>
</div>

Create jquery modal by clicking on table cell

I am beginner in jquery,
I have table which contains one column like no of employees (total no of employee in department) when user clicks on it it should display list of employees in jquery modal (like EmpA,EmpB,EmpC) when clicking on specific employee (EmpA) should display details of that EmpA .

You have a huge question. It is not just a question, it is an application. I can help you get started by showing you how you can (a) use a modal, (b) open/close the modal, and (c) stick stuff into the modal. After that, you must experiment / work with it before asking another question. Fair enough?
For the modal, you have three choices:
(1) You can write your own modal. Not very difficult, but if you are already using another system that includes modals, you should use that.
(2) You can use jQueryUI -- but this is not the same as jQuery. It is an enhancement/add-on to jQuery, the same as Bootstrap is. jQueryUI includes a modal dialog - but so does Bootstrap.
(3) Since you are already using Bootstrap, and since Bootstrap includes a cool modal system, you can -- and should -- use the Bootstrap modal system. It is quite easy.
Here is a link to how the Bootstrap modal system works.
In your case, you might wish to use the jQuery/javascript method of opening/closing the modal. This allows you to decide programmatically when to open the modal.
You also need to populate the modal with new data. Notice that the Bootstrap modal basically looks like this:
<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">
<div>This is the body of the modal. This is where your data goes (HTML table, values, etc).</div>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
Notice the class called modal-body. If you inject new HTML code in there using the jQuery .html() method, you can change what is inside the modal dialog.
$('#mybutt').click(function(){
var newstuff = '\
<div id="newstuff">\
<img src="http://placekitten.com/400/150" /><br>\
<h1>This is an example</h1>\
<h3>Of some new stuff in the modal</h3>\
<button id="nutherbutt">Click me next</button>\
</div>\
';
$('.modal-body').html(newstuff);
});
$(document).on('click', '#nutherbutt', function(){
//You must use .on() to trap events for injected tags
alert('you clicked me');
$('#myModal').modal('hide');
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<button type="button" class="btn btn-info btn-lg" data-toggle="modal" data-target="#myModal">Open Modal</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>
<button id="mybutt">Click Me!</button>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>

Make sure all the libraries are included; jquery, bootstrap.css, bootstrap.js
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" ></script>
<!-- trigger modal -->
<td>
Total
</td>
<td>
4 emplyees
</td>
<!-- 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">List of emplyees</h4>
</div>
<div class="modal-body">
<ul>
<li>Emp 1</li>
<li>Emp 2</li>
<li>Emp 3</li>
<li>Emp 4</li>
</ul>
</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

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