问题
I tried the following:
<div class=\"modal hide fade modal-admin\" id=\"testModal\" style=\"display: none;\">
<div class=\"modal-header\">
<a data-dismiss=\"modal\" class=\"close\">×</a>
<h3 id=\'dialog-heading\'></h3>
</div>
<div class=\"modal-body\">
<div id=\"dialog-data\"></div>
</div>
<div class=\"modal-footer\">
<a data-dismiss=\"modal\" class=\"btn\" >Close</a>
<a class=\"btn btn-primary\" id=\"btnSaveChanges\">Save changes</a>
</div>
</div>
And this Javascript:
$(\'.modal-admin\').css(\'width\', \'750px\');
$(\'.modal-admin\').css(\'margin\', \'100px auto 100px auto\');
$(\'.modal-admin\').modal(\'show\')
The result is not what I expected. The modal top left is positioned in the center of the screen.
Can anyone help me. Has anyone else tried this. I assume it\'s not an unusual thing to want to do.
回答1:
UPDATE:
In bootstrap 3 you need to change the modal-dialog.
So in this case you can add the class modal-admin in the place where modal-dialog stands.
Original Answer (Bootstrap < 3)
Is there a certain reason you're trying to change it with JS/jQuery?
You can easily do it with just CSS, which means you don't have to do your styling in the document. In your own custom CSS file, you add:
body .modal {
/* new custom width */
width: 560px;
/* must be half of the width, minus scrollbar on the left (30px) */
margin-left: -280px;
}
In your case:
body .modal-admin {
/* new custom width */
width: 750px;
/* must be half of the width, minus scrollbar on the left (30px) */
margin-left: -375px;
}
The reason I put body before the selector is so that it takes a higher priority than the default. This way you can add it to an custom CSS file, and without worries update Bootstrap.
回答2:
If you want to make it responsive with just CSS, use this:
.modal.large {
width: 80%; /* respsonsive width */
margin-left:-40%; /* width/2) */
}
Note 1: I used a .large class, you could also do this on the normal .modal
Note 2: In Bootstrap 3 the negative margin-left may not be needed anymore (not confirmed personally)
/*Bootstrap 3*/
.modal.large {
width: 80%;
}
Note 3: In Bootstrap 3 and 4, there is a modal-lg class. So this may be sufficient, but if you want to make it responsive, you still need the fix I provided for Bootstrap 3.
In some application fixed modals are used, in that case you could try width:80%; left:10%; (formula: left = 100 - width / 2)
回答3:
If you're using Bootstrap 3, you need to change the modal-dialog div and not the modal div like it is shown in the accepted answer. Also, to keep the responsive nature of Bootstrap 3, it's important to write the override CSS using a media query so the modal will be full width on smaller devices.
See this JSFiddle to experiment with different widths.
HTML
<div class="modal fade">
<div class="modal-dialog custom-class">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h3 class="modal-header-text">Text</h3>
</div>
<div class="modal-body">
This is some text.
</div>
<div class="modal-footer">
This is some text.
</div>
</div><!-- /.modal-content -->
</div><!-- /.modal-dialog -->
</div><!-- /.modal -->
CSS
@media screen and (min-width: 768px) {
.custom-class {
width: 70%; /* either % (e.g. 60%) or px (400px) */
}
}
回答4:
If you want something that does not break the relative design try this:
body .modal {
width: 90%; /* desired relative width */
left: 5%; /* (100%-width)/2 */
/* place center */
margin-left:auto;
margin-right:auto;
}
As, @Marco Johannesen says, the "body" before the selector is so that it takes a higher priority than the default.
回答5:
In Bootstrap 3+ the most appropriate way to change the size of a modal dialog is to use the size property. Below is an example, notice the modal-sm along the modal-dialog class, indicating a small modal. It can contain the values sm for small, md for medium and lg for large.
<div class="modal fade" id="ww_vergeten" tabindex="-1" role="dialog" aria-labelledby="modal_title" aria-hidden="true">
<div class="modal-dialog modal-sm"> <!-- property to determine size -->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h4 class="modal-title" id="modal_title">Some modal</h4>
</div>
<div class="modal-body">
<!-- modal content -->
</div>
<div class="modal-footer">
<button type="button" class="btn btn-primary" id="some_button" data-loading-text="Loading...">Send</button>
</div>
</div>
</div>
</div>
回答6:
For Bootstrap 3 here's how to do it.
Add a modal-wide style to your HTML markup (as adapted from the example in the Bootstrap 3 docs)
<div class="modal fade modal-wide" 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">×</button>
<h4 id="myModalLabel" class="modal-title">Modal title</h4>
</div>
<div class="modal-body">
<p>One fine body…</p>
</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><!-- /.modal-content -->
</div><!-- /.modal-dialog -->
</div><!-- /.modal -->
and add the following CSS
.modal-wide .modal-dialog {
width: 80%; /* or whatever you wish */
}
There is no need to override margin-left in Bootstrap 3 to get this to be centered now.
回答7:
In Bootstrap 3 all you need is this
<style>
.modal .modal-dialog { width: 80%; }
</style>
Most of the above answers did not worked for me !!!
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet" />
<style>
#myModal1 .modal-dialog {
width: 80%;
}
#myModal2 .modal-dialog {
width: 50%;
}
</style>
<button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal1">
80%
</button>
<button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal2">
50%
</button>
<center>
<!-- Modal -->
<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">
custom width : 80%
</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>
<!-- Modal -->
<div class="modal fade" id="myModal2" 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">
custom width : 50%
</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>
</center>回答8:
Solution was taken from this page
$('#feedback-modal').modal({
backdrop: true,
keyboard: true
}).css({
width: 'auto',
'margin-left': function () {
return -($(this).width() / 2);
}
});
回答9:
In v3 of Bootstrap there is a simple method to make a modal larger. Just add the class modal-lg next to modal-dialog.
<!-- My Modal Popup -->
<div id="MyWidePopup" class="modal fade" role="dialog">
<div class="modal-dialog modal-lg"> <---------------------RIGHT HERE!!
<!-- Modal content-->
<div class="modal-content">
回答10:
Bootstrap 3: In order to maintain responsive features for small and extra small devices I did the following:
@media (min-width: 768px) {
.modal-dialog-wide
{ width: 750px;/* your width */ }
}
回答11:
This is what I did, in my custom.css I added these lines and that was all.
.modal-lg {
width: 600px!important;
margin: 0 auto;
}
Obviously, you can change the size of the width.
回答12:
If Bootstrap>3, Just add style to your modal.
<div class="modal-dialog" style="width:80%;">
<div class="modal-content">
</div>
</div>
回答13:
I've found this solution that works better for me. You can use this:
$('.modal').css({
'width': function () {
return ($(document).width() * .9) + 'px';
},
'margin-left': function () {
return -($(this).width() / 2);
}
});
or this depending your requirements:
$('.modal').css({
width: 'auto',
'margin-left': function () {
return -($(this).width() / 2);
}
});
See the post where I found that: https://github.com/twitter/bootstrap/issues/675
回答14:
FYI Bootstrap 3 handles the left property automatically. So simply adding this CSS will change the width and keep it centered:
.modal .modal-dialog { width: 800px; }
回答15:
Preserve the responsive design, set the width to what you desire.
.modal-content {
margin-left: auto;
margin-right: auto;
max-width: 360px;
}
Keep it simple.
回答16:
Altering the class model-dialog you can achieve expected result. These small tricks work for me. Hope it will help you to solve this issue.
.modal-dialog {
width: 70%;
}
回答17:
With Bootstrap 3, all that is required is a percentage value given to the modal-dialog via CSS
CSS
#alertModal .modal-dialog{
width: 20%;
}
回答18:
I used a combination of CSS and jQuery, along with hints on this page, to create a fluid width and height using Bootstrap 3.
First, some CSS to handle the width and optional scrollbar for the content area
.modal.modal-wide .modal-dialog {
width: 90%;
}
.modal-wide .modal-body {
overflow-y: auto;
}
And then some jQuery to adjust the height of the content area if needed
$(".modal-wide").on("show.bs.modal", function() {
var height = $(window).height() - 200;
$(this).find(".modal-body").css("max-height", height);
});
Full write-up and code at http://scottpdawson.com/development/creating-a-variable-width-modal-dialog-using-bootstrap-3/
回答19:
In Bootstrap 3 with CSS you can simply use:
body .modal-dialog {
/* percentage of page width */
width: 40%;
}
This ensures you don't break the design of the page, because we're using .modal-dialog instead of .modal which will be applied even to the shading.
回答20:
Try something like the following (see live jsfiddle example here: http://jsfiddle.net/periklis/hEThw/1/)
<a class="btn" onclick = "$('#myModal').modal('show');$('#myModal').css('width', '100px').css('margin-left','auto').css('margin-right','auto');" ref="#myModal" >Launch Modal</a>
<div class="modal" id="myModal" style = "display:none">
<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">
<a href="#" class="btn">Close</a>
<a href="#" class="btn btn-primary">Save changes</a>
</div>
</div>
回答21:
Rather than using percentages to make the modal responsive, I find there can be more control taken from using the columns and other responsive elements already built into bootstrap.
To make the modal responsive/the size of any amount of columns:
1) Add an extra div around the modal-dialog div with a class of .container -
<div class="container">
<div class="modal-dialog">
</div>
</div>
2) Add a little CSS to make the modal full width -
.modal-dialog {
width: 100% }
3) Alternatively add in an extra class if you have other modals -
<div class="container">
<div class="modal-dialog modal-responsive">
</div>
</div>
.modal-responsive.modal-dialog {
width: 100% }
4) Add in a row/columns if you want various sized modals -
<div class="container">
<div class="row">
<div class="col-md-4">
<div class="modal-dialog modal-responsive">
...
</div>
</div>
</div>
</div>
回答22:
Add the following on your css file
.popover{
width:auto !important;
max-width:445px !important;
min-width:200px !important;
}
回答23:
Use Below Script:
.modal {
--widthOfModal: 98%;
width: var(--widthOfModal) !important;
margin-left: calc(calc(var(--widthOfModal) / 2) * (-1)) !important;
height: 92%;
overflow-y: scroll;
}
Demo:
回答24:
Achieved expected result using,
.modal-dialog {
width: 41% !important;
}
回答25:
I solved it for Bootstrap 4.1
Mix of previously posted solutions
.modal-lg {
max-width: 90% !important; /* desired relative width */
margin-left:auto !important;
margin-right:auto !important;
}回答26:
I used this way, and it's work perfect for me
$("#my-modal")
.modal("toggle")
.css({'width': '80%', 'margin-left':'auto', 'margin-right':'auto', 'left':'10%'});
回答27:
Less-based solution (no js) for Bootstrap 2:
.modal-width(@modalWidth) {
width: @modalWidth;
margin-left: -@modalWidth/2;
@media (max-width: @modalWidth) {
position: fixed;
top: 20px;
left: 20px;
right: 20px;
width: auto;
margin: 0;
&.fade { top: -100px; }
&.fade.in { top: 20px; }
}
}
Then wherever you want to specify a modal width:
#myModal {
.modal-width(700px);
}
回答28:
I used SCSS, and the fully responsive modal:
.modal-dialog.large {
@media (min-width: $screen-sm-min) { width:500px; }
@media (min-width: $screen-md-min) { width:700px; }
@media (min-width: $screen-lg-min) { width:850px; }
}
回答29:
you can use any prefix or postfix name for modal. but you need to make sure that's should use everywhere with same prefix/postfix name.
body .modal-nk {
/* new custom width */
width: 560px;
/* must be half of the width, minus scrollbar on the left (30px) */
margin-left: -280px;
}
or
body .nk-modal {
/* new custom width */
width: 560px;
/* must be half of the width, minus scrollbar on the left (30px) */
margin-left: -280px;
}
回答30:
Below is the code for set the modal pop-up width and left position from the screen through javascript.
$('#openModalPopupId').css({ "width": "80%", "left": "30%"});
来源：https://stackoverflow.com/questions/10169432/how-can-i-change-the-default-width-of-a-twitter-bootstrap-modal-box