Base

Provides the default style for all HTML elements.

This component defines the base look of your page. It offers great typography by setting the default colors, margins, font-sizes and more for each HTML element. This page is a short guide on how to use basic HTML elements and how UIkit styles them.

Headings

Use the <h1> to <h6> elements to define your headings.

Example

h1 Heading 1

h2 Heading 2

h3 Heading 3

h4 Heading 4

h5 Heading 5

h6 Heading 6

You can add the .uk-h1, .uk-h2, .uk-h3, .uk-h4, .uk-h5 or .uk-h6 class to alter the size of your headings, for example have a h1 look like a h3.

Paragraphs

The global font-size, line-height and regular margins between elements are set through variables, which can be customized. Paragraphs and other block elements stick to these values.

Text-level semantics

The following list gives you a short overview of the most commonly used text-level semantics and how to utilize them.

Horizontal rule

Create a horizontal rule by using the <hr> element.

Example

Blockquotes

For quoting multiple lines of content from another source within your document, use the <blockquote> element.

Example

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam.

Someone famous

Markup

<blockquote>
    <p>Quotation</p>
    <small>Source</small>
</blockquote>

Code blocks

For multiple lines of code, use the <pre> element which defines preformatted text. It creates a new text block that preserves spaces, tabs and line breaks. Nest a <code> element inside to define the code block.
IMPORTANT Be sure to escape any angle brackets in the code for proper rendering.

Example

<pre>
    <code>...</code>
</pre>

NOTE Optionally, you can add the .uk-scrollable-text class from the Utility component, which will set a max-height of 300px and provide a y-axis scrollbar.

Lists

Create an unordered list using the <ul> element and the <ol> element for ordered lists. The <li> element defines the list item.

Example

Markup

<ul>
    <li>...</li>
    <li>...
        <ul>
            <li>...</li>
        </ul>
    </li>
</ul>

<ol>
    <li>...</li>
    <li>...
        <ol>
            <li>...</li>
        </ol>
    </li>
</ol>

Description lists

Create a description list using the <dl> element. Use <dt> to define the term and <dd> for the description.

Example

Description lists

A description list defines terms and their corresponding descriptions.

This is a term

This is a description.

This is a term

This is a description.

Markup

<dl>
    <dt>...</dt>
    <dd>...</dd>
</dl>

Tables

Create a table using the <table> element. Use <tr>, <td> and <th> elements to create table rows, table cells and table headings. The <thead>, <tbody> and <tfoot> elements define the table parts. You can also create captions by adding the <caption> element.

Example

Markup

<table>
    <caption>...</caption>
    <thead>
        <tr>
            <th>...</th>
        </tr>
    </thead>
    <tfoot>
        <tr>
            <td>...</td>
        </tr>
    </tfoot>
    <tbody>
        <tr>
            <td>...</td>
        </tr>
    </tbody>
</table>

Responsive images

All images in UIkit are responsive by default. If the layout is narrowed, images adjust their size and keep their proportions.

Example

Resize the browser window to see the responsive behavior of the image.

NOTE To avoid the responsive behavior and preserve the original image dimensions, add the .uk-img-preserve class to one of your single images. If you have more than one image, you can also add the class to the parent container. This is not required for Google Maps.

Print

Optimize your pages for economic printing.

This component is based on the print styles from HTML5 Boilerplate. It strips your document from background colors and changes font colors to black to save printer ink. Pictures will be scaled down to fit the page and anchors are underlined to distinguish them from regular text.

Modifications

For UIkit, we removed the link href and title related rules.

Text

A collection of useful text utility classes to style your content.

Text styles

UIkit offers various text utlities to style your text.

Text alignment

Add one of these useful classes to align your text.

Example

Text wrapping

Add one of these useful classes to wrap your text.

Article

Create articles within your page.

Usage

The article component constists of the article itself, a title, meta data, an opening paragraph and dividers.

Example

Markup

<article class="uk-article">
    <h1 class="uk-article-title">...</h1>
    <p class="uk-article-meta">...</p>
    <p class="uk-article-lead">...</p>
    ...
    <hr class="uk-article-divider">
    ...
</article>

List

Easily create nicely looking lists, which come in different styles.

Usage

To apply this component, add the .uk-list class to an unordered or ordered list. The list will now display without any spacing or list-style.

Example

• List item 1
• List item 2
• List item 3

Markup

<ul class="uk-list">
    <li>...</li>
    <li>...</li>
    <li>...</li>
</ul>

Modifiers

To display the list in a different style, just add a modifier class to the the .uk-list class. The modifiers of the List component are not combinable with each other.

List line

Add the .uk-list-line class to separate list items with lines.

Example

• List item 1
• List item 2
• List item 3

Markup

<ul class="uk-list uk-list-line">...</ul>

List striped

Add zebra-striping to a list using the .uk-list-striped class.

Example

• List item 1
• List item 2
• List item 3

Markup

<ul class="uk-list uk-list-striped">...</ul>

List space

Add the .uk-list-space class to increase the spacing between list items.

Example

• This modifier may be useful for for list items with multiple lines of text.
• Lorem ipsum dolor sit amet, consectetur adipisicing elit.
• Ut enim ad minim veniam, quis nostrud exercitation ullamco.

Markup

<ul class="uk-list uk-list-space">...</ul>

Description list

Easily create nicely looking description lists, which come in different styles.

Usage

To apply this component, add the .uk-description-list class to a description list.

Example

This is a term

This is a description.

Markup

<dl class="uk-description-list">
    <dt>...</dt>
    <dd>...</dd>
</dl>

Modifiers

To display the description list in a different style, just add a modifier class to the .uk-description-list class. The modifiers of the Description lists component are not combinable with each other.

Description list horizontal

Add the .uk-description-list-horizontal class to display terms and descriptions side by side.

Example

Description lists

A description list defines terms and their corresponding descriptions.

Lorem ipsum

Dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

A long term is truncated

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

Markup

<dl class="uk-description-list uk-description-list-horizontal">...</dl>

Responsive behavior

In narrower viewports, like phones, the style will change back to the default stacked description list.

Description list line

Add the .uk-description-list-line class to separate the description list items with lines.

Example

Description lists

A description list defines terms and their corresponding descriptions.

Lorem ipsum

Dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

Ut enim

Ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Markup

<dl class="uk-description-list uk-description-list-line">...</dl>

Grid

Create a fully responsive, fluid and nestable grid layout.

The grid system of UIkit follows the mobile-first approach and accomodates up to 10 grid columns. It uses units with predefined classes inside each grid, which define the column width.

Usage

To create the grid container, add the .uk-grid class to a parent element. Add one of the .uk-width-* classes to child elements to determine, how the units shall be sized. The grid supports 1, 2, 3, 4, 5, 6 and 10 unit divisions. This table gives you an overview of the uk-width-* classes that can be applied to units.

We built an intentional redundancy into each set of unit classes, so that for instance the .uk-width-5-10 class will work just as well as .uk-width-1-2.

Example

Take a closer look at the following grid example, which gives you a great overwiew of all basic .uk-width-* classes.

NOTE The grid has no style related CSS. In our example we used panels from the Panel component.

Markup

Here is a simple code example of how the default grid with 2 columns would look like:

<div class="uk-grid">
    <div class="uk-width-1-2">...</div>
    <div class="uk-width-1-2">...</div>
</div>

Responsive width

UIkit provides a number of very useful responsive widths classes. Basicall they work just like the usual width classes, except they are prefixed, so that they only come to effect at certain breakpoints. These classes can be combined with the visibility classes from the Utility component. This is great to adjust your layout and content for different device sizes.

IMPORTANT To create a margin between stacking grid columns, just add the data-uk-grid-margin attribute.

Example

Grid gutter

Grids automatically create a horizontal gutter between columns and a vertical one between two succeeding grids. By default, the grid gutter is wider on large screens. To avoid this behavior and preserve the originial spacing, just add the .uk-grid-preserve class.

Example

Nested grid

You can easily extend your grid layout with nested grids.

Example

Markup

<div class="uk-grid">
    <div class="uk-width-1-2">...</div>
    <div class="uk-width-1-2">
        <div class="uk-grid">
            <div class="uk-width-1-2">...</div>
            <div class="uk-width-1-2">...</div>
        </div>
    </div>
</div>

Center grid

Add the .uk-container-center class from the Utility component to center a grid column.

Example

Grid divider

Add the .uk-grid-divider class to separate grid columns with lines. To seperate grids with a horizontal line, just add the class to a <hr> or <div> element.

Example

Markup

<div class="uk-grid uk-grid-divider">...</div>
<hr class="uk-grid-divider">
<div class="uk-grid uk-grid-divider">...</div>

NOTE The horizontal divider can not be applied to grids with any of the uk-push-* or uk-pull-* classes.

Source ordering

You can change the display order of the columns to keep a specific column order in the source code. Add one of the .uk-push-* classes to move the column to the right and add one of the .uk-pull-* classes to move a column to the left. This allows you for example to flip the columns’ display order for wider viewports. The classes can also be used to offset columns, creating additional space between them.

Source ordering is useful for SEO and responsive design, because in narrow viewports the grid will be displayed according to the source order of the markup.

NOTE This feature only works in combination with one of the .uk-width-medium-* classes.

Example

Markup

<div class="uk-grid">
    <div class="uk-width-medium-1-2 uk-push-1-2">...</div>
    <div class="uk-width-medium-1-2 uk-pull-1-2">...</div>
</div>

Match column heights

To match the height of grid columns, just add the data-uk-grid-match attribute to your grid.

Example

Markup

<div class="uk-grid" data-uk-grid-match>...</div>

NOTE If grid columns extend to a width of 100%, their heights will no longer be matched. This makes sense, for example, if they stack vertically in narrower viewports.

Match height of panels

If you want to match the heights of panels in a grid, just add the {target:'.uk-panel'} selector.

Example

Markup

<div class="uk-grid" data-uk-grid-match="{target:'.uk-panel'}">
    <div class="uk-width-medium-1-3">
        <div class="uk-panel">...</div>
    </div>
</div>

Wrap multiple rows

You can also create a grid with as many columns as you want, which automatically break into the next line. Just add the data-uk-grid-margin attribute to create a margin between the grid rows. Typically this layout is built using a <ul> element.

Example

• Box
• Box
• Box
• Box
• Box
• Box

NOTE You can also apply a custom width to your grid columns. Just add the .uk-width-custom class and use an inline style to define the width. This example uses fixed pixel values for the widths as you would do with images.

• Box
• Box
• Box
• Box
• Box
• Box
• Box
• Box

Markup

<ul class="uk-grid" data-uk-grid-margin>

    <!-- These elements have a width in percent -->
    <li class="uk-width-medium-1-5"">...</li>
    <li class="uk-width-medium-3-10"">...</li>

    <!-- These elements have a width in pixel -->
    <li class="uk-width-custom" style="width: 100px;">...</li>
    <li class="uk-width-custom" style="width: 150px;">...</li>

</ul>

Panel

Create layout boxes with different styles.

UIkit uses panels to outline certain sections of your content, which can be styled differently. Typically, panels are arranged in grid columns from the Grid component.

Usage

The Panel component consists of the panel itself, the panel title and a panel badge. To prevent redundant white space, top and bottom margins are removed from the panel’s content.

Example

NOTE By default, a panel is blank and has no styling. That is why it is important to add a modifier class, which gives the panel some styling. In our examples we used the .uk-panel-box class.

Markup

<div class="uk-panel">
    <div class="uk-panel-badge uk-badge">...</div>
    <h3 class="uk-panel-title">...</h3>
    ...
</div>

Panels in a grid

This is a short example of how to use panels with the Grid component. Both panels are using the .uk-width-medium-1-2 class.

Example

Markup

<div class="uk-grid">
    <div class="uk-width-medium-1-2">
        <div class="uk-panel">...</div>
    </div>
    <div class="uk-width-medium-1-2">
        <div class="uk-panel">...</div>
    </div>
</div>

Modifiers

Modifier classes are necessary to add a specific style to panels. UIkit includes a number of panel modifiers and you also have the possibility to create your own.

Panel box

Add the .uk-panel-box class to create a visually styled box. This is the default panel modifier.

Example

Markup

<div class="uk-panel uk-panel-box">...</div>

Add the .uk-panel-box-primary class to modify the box panel and emphasize it with a different color.

Example

Markup

<div class="uk-panel uk-panel-box uk-panel-box-primary">...</div>

Add the .uk-panel-box-secondary class to modify the box panel and give it a white background.

Example

Markup

<div class="uk-panel uk-panel-box uk-panel-box-secondary">...</div>

Panel header

Add the .uk-panel-header class to seperate the panel title and content with a horizontal line.

Example

Markup

<div class="uk-panel uk-panel-header">...</div>

Panel space

Add the .uk-panel-space class to increase the spacing around the panel content.

Example

Markup

<div class="uk-panel uk-panel-space">...</div>

Panel divider

Add the .uk-panel-divider class to separate vertically stacked panels with lines.

Example

Markup

<div class="uk-grid">
    <div class="uk-width-medium-1-2">
        <div class="uk-panel uk-panel-divider">...</div>
        <div class="uk-panel uk-panel-divider">...</div>
        <div class="uk-panel uk-panel-divider">...</div>
    </div>
</div>

NOTE Use the .uk-grid-divider class from the Grid component to seperate grid columns.

Panel with icons

Easily apply an icon from our Icon component to your panel by adding one of the .uk-icon-* classes to an <i> or <span> element inside the panel title.

Example

Markup

<div class="uk-panel">
    <h3 class="uk-panel-title"><i class="uk-icon-*"></i>...</h3>
</div>

Table

Easily create nicely looking tables, which come in different styles.

Usage

To apply this component, add the .uk-table class to a table. The table rows will be separated by lines.

Example

Markup

<table class="uk-table">
    <caption>...</caption>
    <thead>
        <tr>
            <th>...</th>
        </tr>
    </thead>
    <tfoot>
        <tr>
            <td>...</td>
        </tr>
    </tfoot>
    <tbody>
        <tr>
            <td>...</td>
        </tr>
    </tbody>
</table>

Columns

To modify the column width or content, you can use other components. Here are some useful examples:

Markup

<td class="uk-width-1-10 uk-text-right">...</td>
<td class="uk-width-9-10 uk-text-bold">...</td>

Vertical modifier

To vertically center table content, just add the .uk-table-middle class to the <tr> or <td> elements.

Modifiers

To display the table in a different style, just add a modifier to the the .uk-table class.

Table hover

Add the .uk-table-hover class to display a hover state on table rows.

Example

Markup

<table class="uk-table uk-table-hover">...</table>

Table striped

Add zebra-striping to a table by adding the .uk-table-striped class.

Example

Markup

<table class="uk-table uk-table-striped">...</table>

Table condensed

Add the .uk-table-condensed class to make table cells more compact.

Example

Markup

<table class="uk-table uk-table-condensed">...</table>

Combine modifiers

The modifiers of the Table component are combinable with each other.

Example

Markup

<table class="uk-table uk-table-hover uk-table-striped uk-table-condensed">...</table>

Thumbnail

Create different thumbnail images, which come in various styles and sizes.

Usage

To apply this component, just add the .uk-thumbnail class to an <img>, <a> or <figure> element.

Example

Progress

Defines different styles for progress bars.

Usage

The progress bar consists of a background bar and the progress bar itself, indicating the increase.

Example

Markup

<div class="uk-progress">
    <div class="uk-progress-bar" style="width: 40%;">40%</div>
</div>

Size modifiers

Add the .uk-progress-mini or .uk-progress-small class to change the size of the bar.

Example

Markup

<div class="uk-progress uk-progress-mini">...</div>
<div class="uk-progress uk-progress-small">...</div>

Utility

A collection of useful utility classes to style your content.

Container

Add the .uk-container class to a block element to give it a max-width and wrap the main content of your website. For large screens it applies a different max-width.

Centering

To center the container, use the .uk-container-center class. For any other block element, you additionally need to apply a width.

Example

Markup

<div class="uk-width-medium-1-2 uk-container-center">...</div>

Clearing and floating

Floating is fundamental for creating all kinds of layouts. But floats need to be cleared or in the worst case, you might end up with a scrambled site. The following classes will help you to setup basic layouts.

Markup

<div class="uk-clearfix">
    <div class="uk-float-right">...</div>
    <div class="uk-float-left">...</div>
</div>

New block formatting context

Instead of using the .uk-clearfix class, you can create a new block formatting context to clear floats. Depending on your setup, you can evaluate which method is more suited.

Alignment of images and objects

Align images or other elements with spacing between the text and the element.

Example

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Markup

<p class="uk-clearfix">
    <img class="uk-align-medium-right" src="" alt="">
    ...
</p>

Vertical alignment

To align objects vertically, you need to create a parent container to which the object itself will be aligned.

Example

Markup

<div class="uk-vertical-align">
    <div class="uk-vertical-align-middle">
    ...
    </div>
</div>

<div class="uk-vertical-align">
    <div class="uk-vertical-align-bottom">
    ...
    </div>
</div>

NOTE The object you align needs to have a width or max-width that is smaller than its parent container.

Center the entire page

The .uk-height-1-1 class comes in handy, if you want to extend the <html> and <body> elements to the full height of the page. This can be very useful when creating error pages.

Markup

<html class="uk-height-1-1">
    ...
    <body class="uk-height-1-1">
        <div class="uk-vertical-align">
            <div class="uk-vertical-align-middle">...</div>
        </div>
    </body>
</html>

Center horizontally

To center your content horizontally as well, add the .uk-text-center class to the parent and the .uk-container-center class to the child element. This is necessary because of the responsive behavior.

Responsive objects

Images in UIkit adapt to the width of their parent container by default. If you want to apply the responsive behavior to media elements, like a video object, just add one of the following classes.

Example width

Example height

Markup

<video controls class="uk-responsive-width"></video>

<img class="uk-responsive-height" src="" alt="">

Margin

Add one of the following classes to add spacing to block elements.

Smaller margin

Add one of the following classes to add smaller spacing to block elements.

Remove margin

Add one of the following classes to remove spacing from block elements.

Auto margin

To add spacing to stacking elements, for example inline elements that wrap on smaller vieports, just add the data-uk-margin attribute to their parent container. It will automatically add the .uk-margin-small-top to the lower element.

Example

Button
Button
Button
Button
Button
Button
Button
Button
Button
Button

Markup

<p data-uk-margin>
    <button class="uk-button">...</button>
    <button class="uk-button">...</button>
</p>

NOTE By default, the data attribute adds the .uk-margin-small-top class to stacking elements. To apply a bigger margin, just add the {cls:'.uk-margin-top'} option.

Heading large

To increase the font size of your headings on tablets and desktops, just add the .uk-heading-large class.

Example

Heading

Markup

<h1 class="uk-heading-large">...<h1>

Link muted

If a link should not have the default link color, just add the .uk-link-muted class to the anchor element or the parent element.

Example

Heading

• Link
• Link
• Link

Markup

<a class="uk-link-muted">...<a>

<h1 class="uk-link-muted"><a>...<a><h1>

<ul class="uk-link-muted">
    <li><a>...<a></li>
    <li><a>...<a></li>
    <li><a>...<a></li>
</ul>

Scrollable preformatted text

Add the .uk-scrollable-text class to set a max-height and provide a vertical scrollbar. This is very useful for preformatted text, if you don’t want your code blocks to take too much space.

Example

<!-- This is sample code to demonstrate preformatted text with a scrollbar. -->

<div class="uk-grid">
    <div class="uk-width-medium-1-2">
        <div class="uk-panel uk-panel-box uk-text-left">...</div>
    </div>
    <div class="uk-width-medium-1-2">
        <div class="uk-panel uk-panel-box uk-text-right">...</div>
    </div>
</div>
<div class="uk-grid">
    <div class="uk-width-medium-1-2">
        <div class="uk-panel uk-panel-box uk-text-center">...</div>
    </div>
    <div class="uk-width-medium-1-2">
        <div class="uk-panel uk-panel-box uk-text-justify">...</div>
    </div>
</div>

<div class="uk-grid">
    <div class="uk-width-medium-1-2">
        <div class="uk-panel uk-panel-box uk-text-break">...</div>
    </div>
    <div class="uk-width-medium-1-2">
        <div class="uk-panel uk-panel-box"><p class="uk-margin-remove uk-text-truncate">...</p></div>
    </div>
</div>

Scrollable box

Add the .uk-scrollable-box class to create a panel-like box which has a max-height and provides a vertical scrollbar. It can contain any kind of content.

Example

Animation

A basic collection of smooth animations to use within your page.

Usage

To apply this component, add any .uk-animation-* class to an element and it will fade in with a nice animation. These classes are commonly set by using JavaScript to apply the animation to specific behaviors.

Example

Click on any of the boxes to see the animation.

Markup

<div class="uk-animation-fade">...</div>

Reverse modifier

All provided animations are fade-in animations. Add the .uk-animation-reverse class to reverse any animation and fade the element out.

Example

Click on any of the boxes to see the animation.

Markup

<div class="uk-animation-fade uk-animation-reverse">...</div>

Tooltip

Easily create a nicely looking tooltip.

Usage

To apply this component, add the data-uk-tooltip attribute to an element. You also need to add a title attribute, whose value will represent your tooltip’s text.

Example

Hover me Hover me

Markup

<button class="uk-button" data-uk-tooltip title="">...</button>
<span data-uk-tooltip title="">...</span>

Alignment

Add one of the following options to the data-uk-tooltip attribute to adjust the tooltip’s alignment.

Markup

<button class="uk-button" data-uk-tooltip="{pos:'bottom-left'}" title="">...</button>

Scrollspy

Trigger events and animations while scrolling your page.

Usage

The scrollspy component listens to page scrolling and triggers events based on the scroll position. For example, if you scroll down a page and an element appears the first time in the viewport you can trigger a smooth animation to fade in the element.

Typically, classes from the Animation component are used together with the scrollspy.

Examples

This example uses the repeat: true option. Scroll up and down to see the triggered animations.

Markup

<div data-uk-scrollspy="{cls:'uk-animation-fade'}">...</div>

<div data-uk-scrollspy="{cls:'uk-animation-fade', repeat: true}">...</div>

<div data-uk-scrollspy="{cls:'uk-animation-fade', delay:900}">...</div>

Javascript events

The scrollspy component triggers an uk.scrollspy.inview event every time an element is in the viewport and uk.scrollspy.outview when an element leaves the viewport.

Example

$('[data-uk-scrollspy]').on({

    'uk.scrollspy.inview', function(){
        console.log("Element is visible.");
    },

    'uk.scrollspy.outview', function(){
        console.log("Element is not visible.");
    }
});

Scrollspy Nav

To automatically update the active menu item in a menu depending on the scroll position of your site, just add the data attribute data-uk-scrollspy-nav to any navigation. Each menu item must link to the ID of its corresponding part of the site.

For an example of the scrollspy nav, just check out our Scrollspy test page.

Markup

<ul class="uk-nav uk-nav-side" data-uk-scrollspy-nav="{closest:'li', smoothscroll:true}">
    <li><a href="#MY-ID">...</a></li>
    <li><a href="#MY-ID2">...</a></li>
</ul>

<div id="MY-ID">...</div>
<div id="MY-ID2">...</div>

Smooth scroll

Enhance your site with a nice effect that slows down the scrolling when jumping to another part of your page.

Usage

To gradually descrease the speed when you jump from one section of your page to another, for example with a to-top scroller, just add the data-uk-smooth-scroll attribute to an <a> element.

Example

Example here

Markup

<a href="#my-id" class="uk-button" data-uk-smooth-scroll>...</a>

Want Know More?

UIKit is a lightweight and modular front-end framework for developing fast and powerful web interfaces. UIkit gives you a comprehensive collection of HTML, CSS, and JS components which is simple to use, easy to customize and extendable.
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