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Bootstrap/site/content/docs/4.3/components/modal.md
gsoti e138decdbb Add Full-Screen size to Modal and Responsive variations for breakpoints 
(Works from breakpoint and down)
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docs Modal Use Bootstrap's JavaScript modal plugin to add dialogs to your site for lightboxes, user notifications, or completely custom content. components true

How it works

Before getting started with Bootstrap's modal component, be sure to read the following as our menu options have recently changed.

  • Modals are built with HTML, CSS, and JavaScript. They're positioned over everything else in the document and remove scroll from the <body> so that modal content scrolls instead.
  • Clicking on the modal "backdrop" will automatically close the modal.
  • Bootstrap only supports one modal window at a time. Nested modals aren't supported as we believe them to be poor user experiences.
  • Modals use position: fixed, which can sometimes be a bit particular about its rendering. Whenever possible, place your modal HTML in a top-level position to avoid potential interference from other elements. You'll likely run into issues when nesting a .modal within another fixed element.
  • Once again, due to position: fixed, there are some caveats with using modals on mobile devices. [See our browser support docs]({{< docsref "/getting-started/browsers-devices#modals-and-dropdowns-on-mobile" >}}) for details.
  • Due to how HTML5 defines its semantics, the autofocus HTML attribute has no effect in Bootstrap modals. To achieve the same effect, use some custom JavaScript:

{{< highlight js >}} var myModal = document.getElementById('myModal') var myInput = document.getElementById('myInput')

myModal.addEventListener('shown.bs.modal', function () { myInput.focus() }) {{< /highlight >}}

{{< callout info >}} {{< partial "callout-info-prefersreducedmotion.md" >}} {{< /callout >}}

Keep reading for demos and usage guidelines.

Examples

Modal components

Below is a static modal example (meaning its position and display have been overridden). Included are the modal header, modal body (required for padding), and modal footer (optional). We ask that you include modal headers with dismiss actions whenever possible, or provide another explicit dismiss action.

Modal title

Modal body text goes here.

Close Save changes

{{< highlight html >}}

Modal title

Modal body text goes here.

Close Save changes
{{< /highlight >}}

Live demo

Toggle a working modal demo by clicking the button below. It will slide down and fade in from the top of the page.

Launch demo modal

{{< highlight html >}}

Launch demo modal {{< /highlight >}}

Static backdrop

When backdrop is set to static, the modal will not close when clicking outside it. Click the button below to try it.

Launch static backdrop modal

{{< highlight html >}}

Launch static backdrop modal {{< /highlight >}}

Scrolling long content

When modals become too long for the user's viewport or device, they scroll independent of the page itself. Try the demo below to see what we mean.

Launch demo modal

You can also create a scrollable modal that allows scroll the modal body by adding .modal-dialog-scrollable to .modal-dialog.

Launch demo modal

{{< highlight html >}}

...
{{< /highlight >}}

Vertically centered

Add .modal-dialog-centered to .modal-dialog to vertically center the modal.

Vertically centered modal Vertically centered scrollable modal

{{< highlight html >}}

...
...
{{< /highlight >}}

Tooltips and popovers

[Tooltips]({{< docsref "/components/tooltips" >}}) and [popovers]({{< docsref "/components/popovers" >}}) can be placed within modals as needed. When modals are closed, any tooltips and popovers within are also automatically dismissed.

Launch demo modal

{{< highlight html >}}

Popover in a modal

This button triggers a popover on click.

Tooltips in a modal

This link and that link have tooltips on hover.

{{< /highlight >}}

Using the grid

Utilize the Bootstrap grid system within a modal by nesting .container-fluid within the .modal-body. Then, use the normal grid system classes as you would anywhere else.

Launch demo modal

{{< highlight html >}}

.col-md-4
.col-md-4 .ml-auto
.col-md-3 .ml-auto
.col-md-2 .ml-auto
.col-md-6 .ml-auto
Level 1: .col-sm-9
Level 2: .col-8 .col-sm-6
Level 2: .col-4 .col-sm-6
{{< /highlight >}}

Varying modal content

Have a bunch of buttons that all trigger the same modal with slightly different contents? Use event.relatedTarget and HTML data-* attributes to vary the contents of the modal depending on which button was clicked.

Below is a live demo followed by example HTML and JavaScript. For more information, read the modal events docs for details on relatedTarget.

{{< example >}} Open modal for @mdo Open modal for @fat Open modal for @getbootstrap

{{< /example >}}

{{< highlight js >}} var exampleModal = document.getElementById('exampleModal') exampleModal.addEventListener('show.bs.modal', function (event) { // Button that triggered the modal var button = event.relatedTarget // Extract info from data-* attributes var recipient = button.getAttribute('data-whatever') // If necessary, you could initiate an AJAX request here // and then do the updating in a callback. // // Update the modal's content. exampleModal.querySelector('.modal-title').textContent = 'New message to ' + recipient exampleModal.querySelector('.modal-body input').value = recipient }) {{< /highlight >}}

Change animation

The $modal-fade-transform variable determines the transform state of .modal-dialog before the modal fade-in animation, the $modal-show-transform variable determines the transform of .modal-dialog at the end of the modal fade-in animation.

If you want for example a zoom-in animation, you can set $modal-fade-transform: scale(.8).

Remove animation

For modals that simply appear rather than fade in to view, remove the .fade class from your modal markup.

{{< highlight html >}}

{{< /highlight >}}

Dynamic heights

If the height of a modal changes while it is open, you should call myModal.handleUpdate() to readjust the modal's position in case a scrollbar appears.

Accessibility

Be sure to add role="dialog" and aria-labelledby="...", referencing the modal title, to .modal, and role="document" to the .modal-dialog itself. Additionally, you may give a description of your modal dialog with aria-describedby on .modal.

Embedding YouTube videos

Embedding YouTube videos in modals requires additional JavaScript not in Bootstrap to automatically stop playback and more. See this helpful Stack Overflow post for more information.

Optional sizes

Modals have three optional sizes, available via modifier classes to be placed on a .modal-dialog. These sizes kick in at certain breakpoints to avoid horizontal scrollbars on narrower viewports.

Size Class Modal max-width
Small .modal-sm 300px
Default None 500px
Large .modal-lg 800px
Extra large .modal-xl 1140px

Our default modal without modifier class constitutes the "medium" size modal.

Extra large modal Large modal Small modal

{{< highlight html >}}

...
...
...
{{< /highlight >}}

Fullscreen Modal

Another override is the option to pop up a modal that covers the user viewport, available via modifier classes that are placed on a .modal-dialog.

Class Availability
.modal-fullscreen Always
.modal-fullscreen-xl-down Below 1200px
.modal-fullscreen-lg-down Below 992px
.modal-fullscreen-md-down Below 768px
.modal-fullscreen-sm-down Below 576px
Full screen Full screen below xl Full screen below lg Full screen below md Full screen below sm

{{< highlight html >}}

Full screen modal

{{< /highlight >}}

Usage

The modal plugin toggles your hidden content on demand, via data attributes or JavaScript. It also adds .modal-open to the <body> to override default scrolling behavior and generates a .modal-backdrop to provide a click area for dismissing shown modals when clicking outside the modal.

Via data attributes

Activate a modal without writing JavaScript. Set data-toggle="modal" on a controller element, like a button, along with a data-target="#foo" or href="#foo" to target a specific modal to toggle.

{{< highlight html >}} Launch modal {{< /highlight >}}

Via JavaScript

Create a modal with a single line of JavaScript:

{{< highlight js >}} var myModal = new bootstrap.Modal(document.getElementById('myModal'), options) {{< /highlight >}}

Options

Options can be passed via data attributes or JavaScript. For data attributes, append the option name to data-, as in data-backdrop="".

Name Type Default Description
backdrop boolean or the string 'static' true Includes a modal-backdrop element. Alternatively, specify static for a backdrop which doesn't close the modal on click.
keyboard boolean true Closes the modal when escape key is pressed
focus boolean true Puts the focus on the modal when initialized.
show boolean true Shows the modal when initialized.

Methods

{{< callout danger >}} {{< partial "callout-danger-async-methods.md" >}} {{< /callout >}}

Passing options

Activates your content as a modal. Accepts an optional options object.

{{< highlight js >}} var myModal = new bootstrap.Modal(document.getElementById('myModal'), { keyboard: false }) {{< /highlight >}}

toggle

Manually toggles a modal. Returns to the caller before the modal has actually been shown or hidden (i.e. before the shown.bs.modal or hidden.bs.modal event occurs).

{{< highlight js >}}myModal.toggle(){{< /highlight >}}

show

Manually opens a modal. Returns to the caller before the modal has actually been shown (i.e. before the shown.bs.modal event occurs).

{{< highlight js >}}myModal.show(){{< /highlight >}}

hide

Manually hides a modal. Returns to the caller before the modal has actually been hidden (i.e. before the hidden.bs.modal event occurs).

{{< highlight js >}}myModal.hide(){{< /highlight >}}

handleUpdate

Manually readjust the modal's position if the height of a modal changes while it is open (i.e. in case a scrollbar appears).

{{< highlight js >}}myModal.handleUpdate(){{< /highlight >}}

dispose

Destroys an element's modal.

{{< highlight js >}}myModal.dispose(){{< /highlight >}}

getInstance

Static method which allows you to get the modal instance associated with a DOM element

{{< highlight js >}} var myModalEl = document.getElementById('myModal') var modal = bootstrap.Modal.getInstance(myModalEl) // Returns a Bootstrap modal instance {{< /highlight >}}

Events

Bootstrap's modal class exposes a few events for hooking into modal functionality. All modal events are fired at the modal itself (i.e. at the <div class="modal">).

Event type Description
show.bs.modal This event fires immediately when the show instance method is called. If caused by a click, the clicked element is available as the relatedTarget property of the event.
shown.bs.modal This event is fired when the modal has been made visible to the user (will wait for CSS transitions to complete). If caused by a click, the clicked element is available as the relatedTarget property of the event.
hide.bs.modal This event is fired immediately when the hide instance method has been called.
hidden.bs.modal This event is fired when the modal has finished being hidden from the user (will wait for CSS transitions to complete).
hidePrevented.bs.modal This event is fired when the modal is shown, its backdrop is static and a click outside the modal or an escape key press is performed with the keyboard option or data-keyboard set to false.

{{< highlight js >}} var myModalEl = document.getElementById('myModal') myModalEl.addEventListener('hidden.bs.modal', function (e) { // do something... }) {{< /highlight >}}