Loaders

Variations Design Guidelines Code Reference Accessibility

Loaders

HTML/CSS Available
Web Component Available
Last Updated
2.21.0

Loaders indicate that content will process for an indeterminate amount of time.

Variations Design Guidelines Code Reference Accessibility

Variations

Default

HTML

Web Component

<div class="mds-loader" role="progressbar" aria-valuetext="Please wait, page is loading...">
    <div class="mds-loader__item mds-loader__item--1"></div>
    <div class="mds-loader__item mds-loader__item--2"></div>
    <div class="mds-loader__item mds-loader__item--3"></div>
    <div class="mds-loader__item mds-loader__item--4"></div>
    <div class="mds-loader__item mds-loader__item--5"></div>
    <div class="mds-loader__item mds-loader__item--6"></div>
    <div class="mds-loader__item mds-loader__item--7"></div>
    <div class="mds-loader__item mds-loader__item--8"></div>
</div>

<mds-loader></mds-loader>

Sizing

Small

Medium (Default)

Large

Small

Medium (Default)

Large

HTML

Web Component

<div class="mds-loader mds-loader--small" role="progressbar" aria-valuetext="Please wait, page is loading...">
    <div class="mds-loader__item mds-loader__item--1"></div>
    <div class="mds-loader__item mds-loader__item--2"></div>
    <div class="mds-loader__item mds-loader__item--3"></div>
    <div class="mds-loader__item mds-loader__item--4"></div>
    <div class="mds-loader__item mds-loader__item--5"></div>
    <div class="mds-loader__item mds-loader__item--6"></div>
    <div class="mds-loader__item mds-loader__item--7"></div>
    <div class="mds-loader__item mds-loader__item--8"></div>
</div>

<mds-loader size="small"></mds-loader>

Use the small loader with components smaller than ¼ of the viewport.
Use the medium loader when loading a full page or a component that takes up more than ¼ of the viewport, which will be most cases.
Use the large loader when loading a full page at mobile breakpoints.

Use When

Loading content for an entire page.
Loading content inside of a component.
Loading content inside of a Modal.
Loading the next step of a workflow.

Visual Language

Behaviors

For load times longer than 10 seconds, consider including a notification with explanatory text.

CSS

Class References

Class	Applies to	Outcome
`mds-loader--small`	`mds-loader`	Makes the loader smaller.
`mds-loader--large`	`mds-loader`	Makes the loader larger.
`mds-loader--hidden`	`mds-loader`	Hides the loader when not in use.

Web Component

Props

When setting props as attributes on a custom HTML element, use kebab-case instead of camelCase.

Prop	Type	Validation	Default	Description
`additionalClass`	String	—	—	A space-separated list of class names that will be appended to the default `mds-loader` class.
`ariaValuetext`	String	—	Loading...	Accessible text that describes what is happening while the loader is being displayed.
`size`	String	One of: `small`, `medium`, `large`	`medium`	Alters the size of the loader.

Usage Examples

Setting size via props:

<mds-loader size="large"></mds-loader>

Implementation

Add role=”progressbar” to .mds-loader.
If not active, apply aria-hidden=”true” to .mds-loader, otherwise use aria-hidden=”false”.
Always include aria-valuetext=”XXX”, where XXX is a textual presentation of the loader, i.e., “Please wait, this data table is loading…”.
Add aria-busy=”true” to a container or element to indicate the element is loading. Once loaded, change the value from true to false. For example:
- If loading an entire page, add the attribute to <body> or wrapper.
- If loading a specific component (i.e., table), add the attribute to the container of that component.
- If loading content inside a Modal, add the attribute to the .mds-modal container.