How to Prevent Body Scrolling When a Modal Window Is Open?
Oct 19, 2024 pm 06:05 PM
Preventing Body Scrolling When Modal is Open
Problem Statement:
When using the Modal from http://twitter.github.com/bootstrap, the body continues to scroll when the mousewheel is used. How can we prevent this?
Attempted Solutions:
Attempts to use JavaScript to prevent scrolling using $(window).scroll and $(window).live('scroll') have been unsuccessful.
Bootstrap Support:
Bootstrap has introduced the modal-open class to the body when a modal dialog is displayed. This class can be used to prevent scrolling via CSS.
<code class="css">body.modal-open {
overflow: hidden;
}</code>
Current Situation (Updated 8th Feb 2013):
This solution no longer works with Twitter Bootstrap v. 2.3.0, as the modal-open class is not added to the body.
Current Workaround:
Add and remove the modal-open class to the body when the modal is displayed and hidden, respectively, using the following JavaScript:
<code class="javascript">$("#myModal").on("show", function() {
$("body").addClass("modal-open");
}).on("hidden", function() {
$("body").removeClass("modal-open");
});</code>
Future Update (11th March 2013):
The modal-open class is expected to return in Bootstrap 3.0 with the explicit purpose of preventing scroll:
<code class="css">/* Enable Body overflow hidden */
.modal {
...
/* support for transition.* to transition .bs-modal-backdrop and .bs-modal-content */
-webkit-transition: opacity .3s ease-out;
-moz-transition: opacity .3s ease-out;
-o-transition: opacity .3s ease-out;
transition: opacity .3s ease-out;
/* modal container size */
width: 560px;
margin: 20px auto;
padding: 0;
border: 0;
border-radius: 6px;
/* background color; best with border-radius for dialog box effect */
/* fallback for IE7-8 */
background-color: #ffffff;
/* IE9+ */
background-clip: padding-box;
/* fade in effect; (speed/timing via CSS animation) */
opacity: 1;
}
/* body overflow hidden */
body.modal-open {
overflow: hidden;
}</code>The above is the detailed content of How to Prevent Body Scrolling When a Modal Window Is Open?. For more information, please follow other related articles on the PHP Chinese website!
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