Popup

<wa-popup>

Since 2.0

stable

Popup is a utility that lets you declaratively anchor "popup" containers to another element.

This component's name is inspired by <popup>. It uses Floating UI under the hood to provide a well-tested, lightweight, and fully declarative positioning utility for tooltips, dropdowns, and more.

Popup doesn't provide any styles — just positioning! The popup's preferred placement, distance, and skidding (offset) can be configured using attributes. An arrow that points to the anchor can be shown and customized to your liking. Additional positioning options are available and described in more detail below.

Popup is a low-level utility built specifically for positioning elements. Do not mistake it for a tooltip or similar because it does not facilitate an accessible experience! Almost every correct usage of <wa-popup> will involve building other components. It should rarely, if ever, occur directly in your HTML.

    
      top
      top-start
      top-end
      bottom
      bottom-start
      bottom-end
      right
      right-start
      right-end
      left
      left-start
      left-end
    
    Active
    Arrow

<div class="popup-overview">
  <wa-popup placement="top" active>
    <span slot="anchor"></span>
    <div class="box"></div>
  </wa-popup>

  <div class="popup-overview-options">
    <wa-select label="Placement" name="placement" value="top" class="popup-overview-select">
      <wa-option value="top">top</wa-option>
      <wa-option value="top-start">top-start</wa-option>
      <wa-option value="top-end">top-end</wa-option>
      <wa-option value="bottom">bottom</wa-option>
      <wa-option value="bottom-start">bottom-start</wa-option>
      <wa-option value="bottom-end">bottom-end</wa-option>
      <wa-option value="right">right</wa-option>
      <wa-option value="right-start">right-start</wa-option>
      <wa-option value="right-end">right-end</wa-option>
      <wa-option value="left">left</wa-option>
      <wa-option value="left-start">left-start</wa-option>
      <wa-option value="left-end">left-end</wa-option>
    </wa-select>
    <wa-input type="number" name="distance" label="distance" value="0"></wa-input>
    <wa-input type="number" name="skidding" label="Skidding" value="0"></wa-input>
  </div>

  <div class="popup-overview-options">
    <wa-switch name="active" checked>Active</wa-switch>
    <wa-switch name="arrow">Arrow</wa-switch>
  </div>
</div>

<script>
  const container = document.querySelector('.popup-overview');
  const popup = container.querySelector('wa-popup');
  const select = container.querySelector('wa-select[name="placement"]');
  const distance = container.querySelector('wa-input[name="distance"]');
  const skidding = container.querySelector('wa-input[name="skidding"]');
  const active = container.querySelector('wa-switch[name="active"]');
  const arrow = container.querySelector('wa-switch[name="arrow"]');

  select.addEventListener('change', () => (popup.placement = select.value));
  distance.addEventListener('input', () => (popup.distance = distance.value));
  skidding.addEventListener('input', () => (popup.skidding = skidding.value));
  active.addEventListener('change', () => (popup.active = active.checked));
  arrow.addEventListener('change', () => (popup.arrow = arrow.checked));
</script>

<style>
  .popup-overview wa-popup {
    --arrow-color: var(--wa-color-brand-fill-loud);
  }

  .popup-overview span[slot='anchor'] {
    display: inline-block;
    width: 150px;
    height: 150px;
    border: dashed 2px var(--wa-color-neutral-fill-loud);
    margin: 50px;
  }

  .popup-overview .box {
    width: 100px;
    height: 50px;
    background: var(--wa-color-brand-fill-loud);
    border-radius: var(--wa-border-radius-m);
  }

  .popup-overview-options {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    gap: 1rem;
  }

  .popup-overview-options wa-select {
    width: 160px;
  }

  .popup-overview-options wa-input {
    width: 100px;
  }

  .popup-overview-options + .popup-overview-options {
    margin-top: 1rem;
  }
</style>

A popup's anchor should not be styled with display: contents since the coordinates will not be eligible for calculation. However, if the anchor is a <slot> element, popup will use the first assigned element as the anchor. This behavior allows other components to pass anchors through more easily via composition.

Examples Jump to heading

Activating Jump to heading

Popups are inactive and hidden until the active attribute is applied. Removing the attribute will tear down all positioning logic and listeners, meaning you can have many idle popups on the page without affecting performance.

<div class="popup-active">
  <wa-popup placement="top" active>
    <span slot="anchor"></span>
    <div class="box"></div>
  </wa-popup>

  <br />
  <wa-switch checked>Active</wa-switch>
</div>

<style>
  .popup-active span[slot='anchor'] {
    display: inline-block;
    width: 150px;
    height: 150px;
    border: dashed 2px var(--wa-color-neutral-fill-loud);
    margin: 50px;
  }

  .popup-active .box {
    width: 100px;
    height: 50px;
    background: var(--wa-color-brand-fill-loud);
    border-radius: var(--wa-border-radius-m);
  }
</style>

<script>
  const container = document.querySelector('.popup-active');
  const popup = container.querySelector('wa-popup');
  const active = container.querySelector('wa-switch');

  active.addEventListener('change', () => (popup.active = active.checked));
</script>

External Anchors Jump to heading

By default, anchors are slotted into the popup using the anchor slot. If your anchor needs to live outside of the popup, you can pass the anchor's id to the anchor attribute. Alternatively, you can pass an element reference to the anchor property to achieve the same effect without using an id.

<span id="external-anchor"></span>

<wa-popup anchor="external-anchor" placement="top" active>
  <div class="box"></div>
</wa-popup>

<style>
  #external-anchor {
    display: inline-block;
    width: 150px;
    height: 150px;
    border: dashed 2px var(--wa-color-neutral-fill-loud);
    margin: 50px 0 0 50px;
  }

  #external-anchor ~ wa-popup .box {
    width: 100px;
    height: 50px;
    background: var(--wa-color-brand-fill-loud);
    border-radius: var(--wa-border-radius-m);
  }
</style>

Placement Jump to heading

Use the placement attribute to tell the popup the preferred placement of the popup. Note that the actual position will vary to ensure the panel remains in the viewport if you're using positioning features such as flip and shift.

Since placement is preferred when using flip, you can observe the popup's current placement when it's active by looking at the data-current-placement attribute. This attribute will update as the popup flips to find available space and it will be removed when the popup is deactivated.

  


  
    top
    top-start
    top-end
    bottom
    bottom-start
    bottom-end
    right
    right-start
    right-end
    left
    left-start
    left-end
  

                
              

<div class="popup-placement">
  <wa-popup placement="top" active>
    <span slot="anchor"></span>
    <div class="box"></div>
  </wa-popup>

  <wa-select label="Placement" value="top">
    <wa-option value="top">top</wa-option>
    <wa-option value="top-start">top-start</wa-option>
    <wa-option value="top-end">top-end</wa-option>
    <wa-option value="bottom">bottom</wa-option>
    <wa-option value="bottom-start">bottom-start</wa-option>
    <wa-option value="bottom-end">bottom-end</wa-option>
    <wa-option value="right">right</wa-option>
    <wa-option value="right-start">right-start</wa-option>
    <wa-option value="right-end">right-end</wa-option>
    <wa-option value="left">left</wa-option>
    <wa-option value="left-start">left-start</wa-option>
    <wa-option value="left-end">left-end</wa-option>
  </wa-select>
</div>

<style>
  .popup-placement span[slot='anchor'] {
    display: inline-block;
    width: 150px;
    height: 150px;
    border: dashed 2px var(--wa-color-neutral-fill-loud);
    margin: 50px;
  }

  .popup-placement .box {
    width: 100px;
    height: 50px;
    background: var(--wa-color-brand-fill-loud);
    border-radius: var(--wa-border-radius-m);
  }

  .popup-placement wa-select {
    max-width: 280px;
  }
</style>

<script>
  const container = document.querySelector('.popup-placement');
  const popup = container.querySelector('wa-popup');
  const select = container.querySelector('wa-select');

  select.addEventListener('change', () => (popup.placement = select.value));
</script>

Distance Jump to heading

Use the distance attribute to change the distance between the popup and its anchor. A positive value will move the popup further away and a negative value will move it closer.

<div class="popup-distance">
  <wa-popup placement="top" distance="0" active>
    <span slot="anchor"></span>
    <div class="box"></div>
  </wa-popup>

  <wa-slider min="-50" max="50" step="1" value="0" label="Distance"></wa-slider>
</div>

<style>
  .popup-distance span[slot='anchor'] {
    display: inline-block;
    width: 150px;
    height: 150px;
    border: dashed 2px var(--wa-color-neutral-fill-loud);
    margin: 50px;
  }

  .popup-distance .box {
    width: 100px;
    height: 50px;
    background: var(--wa-color-brand-fill-loud);
    border-radius: var(--wa-border-radius-m);
  }

  .popup-distance wa-slider {
    max-width: 260px;
  }
</style>

<script>
  const container = document.querySelector('.popup-distance');
  const popup = container.querySelector('wa-popup');
  const distance = container.querySelector('wa-slider');

  distance.addEventListener('input', () => (popup.distance = distance.value));
</script>

Skidding Jump to heading

The skidding attribute is similar to distance, but instead allows you to offset the popup along the anchor's axis. Both positive and negative values are allowed.

<div class="popup-skidding">
  <wa-popup placement="top" skidding="0" active>
    <span slot="anchor"></span>
    <div class="box"></div>
  </wa-popup>

  <wa-slider min="-50" max="50" step="1" value="0" label="Skidding"></wa-slider>
</div>

<style>
  .popup-skidding span[slot='anchor'] {
    display: inline-block;
    width: 150px;
    height: 150px;
    border: dashed 2px var(--wa-color-neutral-fill-loud);
    margin: 50px;
  }

  .popup-skidding .box {
    width: 100px;
    height: 50px;
    background: var(--wa-color-brand-fill-loud);
    border-radius: var(--wa-border-radius-m);
  }

  .popup-skidding wa-slider {
    max-width: 260px;
  }
</style>

<script>
  const container = document.querySelector('.popup-skidding');
  const popup = container.querySelector('wa-popup');
  const skidding = container.querySelector('wa-slider');

  skidding.addEventListener('input', () => (popup.skidding = skidding.value));
</script>

Arrows Jump to heading

Add an arrow to your popup with the arrow attribute. It's usually a good idea to set a distance to make room for the arrow. To adjust the arrow's color and size, use the --arrow-color and --arrow-size custom properties, respectively. You can also target the arrow part to add additional styles such as shadows and borders.

By default, the arrow will be aligned as close to the center of the anchor as possible, considering available space and arrow-padding. You can use the arrow-placement attribute to force the arrow to align to the start, end, or center of the popup instead.

    
      top
      top-start
      top-end
      bottom
      bottom-start
      bottom-end
      right
      right-start
      right-end
      left
      left-start
      left-end
    

    
      anchor
      start
      end
      center
    
  

    Arrow
  

                
              

<div class="popup-arrow">
  <wa-popup placement="top" arrow arrow-placement="anchor" distance="8" active>
    <span slot="anchor"></span>
    <div class="box"></div>
  </wa-popup>

  <div class="popup-arrow-options">
    <wa-select label="Placement" name="placement" value="top" class="popup-overview-select">
      <wa-option value="top">top</wa-option>
      <wa-option value="top-start">top-start</wa-option>
      <wa-option value="top-end">top-end</wa-option>
      <wa-option value="bottom">bottom</wa-option>
      <wa-option value="bottom-start">bottom-start</wa-option>
      <wa-option value="bottom-end">bottom-end</wa-option>
      <wa-option value="right">right</wa-option>
      <wa-option value="right-start">right-start</wa-option>
      <wa-option value="right-end">right-end</wa-option>
      <wa-option value="left">left</wa-option>
      <wa-option value="left-start">left-start</wa-option>
      <wa-option value="left-end">left-end</wa-option>
    </wa-select>

    <wa-select label="Arrow Placement" name="arrow-placement" value="anchor">
      <wa-option value="anchor">anchor</wa-option>
      <wa-option value="start">start</wa-option>
      <wa-option value="end">end</wa-option>
      <wa-option value="center">center</wa-option>
    </wa-select>
  </div>

  <div class="popup-arrow-options">
    <wa-switch name="arrow" checked>Arrow</wa-switch>
  </div>

  <style>
    .popup-arrow wa-popup {
      --arrow-color: var(--wa-color-brand-fill-loud);
    }

    .popup-arrow span[slot='anchor'] {
      display: inline-block;
      width: 150px;
      height: 150px;
      border: dashed 2px var(--wa-color-neutral-fill-loud);
      margin: 50px;
    }

    .popup-arrow .box {
      width: 100px;
      height: 50px;
      background: var(--wa-color-brand-fill-loud);
      border-radius: var(--wa-border-radius-m);
    }

    .popup-arrow-options {
      display: flex;
      flex-wrap: wrap;
      align-items: end;
      gap: 1rem;
    }

    .popup-arrow-options wa-select {
      width: 160px;
    }

    .popup-arrow-options + .popup-arrow-options {
      margin-top: 1rem;
    }
  </style>

  <script>
    const container = document.querySelector('.popup-arrow');
    const popup = container.querySelector('wa-popup');
    const placement = container.querySelector('[name="placement"]');
    const arrowPlacement = container.querySelector('[name="arrow-placement"]');
    const arrow = container.querySelector('[name="arrow"]');

    placement.addEventListener('change', () => (popup.placement = placement.value));
    arrowPlacement.addEventListener('change', () => (popup.arrowPlacement = arrowPlacement.value));
    arrow.addEventListener('change', () => (popup.arrow = arrow.checked));
  </script>
</div>

Flip Jump to heading

When the popup doesn't have enough room in its preferred placement, it can automatically flip to keep it in view and visually connected to its anchor. To enable this, use the flip attribute. By default, the popup will flip to the opposite placement, but you can configure preferred fallback placements using flip-fallback-placement and flip-fallback-strategy. Additional options are available to control the flip behavior's boundary and padding.

By default, flip takes effect when the popup would overflow the viewport. You can use boundary="scroll" to make the popup resize when it overflows its nearest scrollable container instead.

Scroll the container to see how the popup flips to prevent clipping.

<div class="popup-flip">
  <div class="overflow">
    <wa-popup placement="top" flip active boundary="scroll">
      <span slot="anchor"></span>
      <div class="box"></div>
    </wa-popup>
  </div>

  <br />
  <wa-switch checked>Flip</wa-switch>
</div>

<style>
  .popup-flip .overflow {
    position: relative;
    height: 300px;
    border: solid 2px var(--wa-color-surface-border);
    overflow: auto;
  }

  .popup-flip span[slot='anchor'] {
    display: inline-block;
    width: 150px;
    height: 150px;
    border: dashed 2px var(--wa-color-neutral-fill-loud);
    margin: 150px 50px;
  }

  .popup-flip .box {
    width: 100px;
    height: 50px;
    background: var(--wa-color-brand-fill-loud);
    border-radius: var(--wa-border-radius-m);
  }
</style>

<script>
  const container = document.querySelector('.popup-flip');
  const popup = container.querySelector('wa-popup');
  const flip = container.querySelector('wa-switch');

  flip.addEventListener('change', () => (popup.flip = flip.checked));
</script>

Flip Fallbacks Jump to heading

While using the flip attribute, you can customize the placement of the popup when the preferred placement doesn't have room. For this, use flip-fallback-placements and flip-fallback-strategy.

If the preferred placement doesn't have room, the first suitable placement found in flip-fallback-placement will be used. The value of this attribute must be a string including any number of placements separated by a space, e.g. "right bottom".

If no fallback placement works, the final placement will be determined by flip-fallback-strategy. This value can be either initial (default), where the placement reverts to the position in placement, or best-fit, where the placement is chosen based on available space.

Scroll the container to see how the popup changes it's fallback placement to prevent clipping.

<div class="popup-flip-fallbacks">
  <div class="overflow">
    <wa-popup
      placement="top"
      flip
      flip-fallback-placements="right bottom"
      flip-fallback-strategy="initial"
      active
      boundary="scroll"
    >
      <span slot="anchor"></span>
      <div class="box"></div>
    </wa-popup>
  </div>
</div>

<style>
  .popup-flip-fallbacks .overflow {
    position: relative;
    height: 300px;
    border: solid 2px var(--wa-color-surface-border);
    overflow: auto;
  }

  .popup-flip-fallbacks span[slot='anchor'] {
    display: inline-block;
    width: 150px;
    height: 150px;
    border: dashed 2px var(--wa-color-neutral-fill-loud);
    margin: 250px 50px;
  }

  .popup-flip-fallbacks .box {
    width: 100px;
    height: 50px;
    background: var(--wa-color-brand-fill-loud);
    border-radius: var(--wa-border-radius-m);
  }
</style>

Shift Jump to heading

When a popup is longer than its anchor, it risks overflowing. In this case, use the shift attribute to shift the popup along its axis and back into view. You can customize the shift behavior using shiftBoundary and shift-padding.

By default, auto-size takes effect when the popup would overflow the viewport. You can use boundary="scroll" to make the popup resize when it overflows its nearest scrollable container instead.

Toggle the switch to see the difference.

<div class="popup-shift">
  <div class="overflow">
    <wa-popup placement="top" shift shift-padding="10" active boundary="scroll">
      <span slot="anchor"></span>
      <div class="box"></div>
    </wa-popup>
  </div>

  <wa-switch checked>Shift</wa-switch>
</div>

<style>
  .popup-shift .overflow {
    position: relative;
    border: solid 2px var(--wa-color-surface-border);
    overflow: auto;
  }

  .popup-shift span[slot='anchor'] {
    display: inline-block;
    width: 150px;
    height: 150px;
    border: dashed 2px var(--wa-color-neutral-fill-loud);
    margin: 60px 0 0 10px;
  }

  .popup-shift .box {
    width: 300px;
    height: 50px;
    background: var(--wa-color-brand-fill-loud);
    border-radius: var(--wa-border-radius-m);
  }
</style>

<script>
  const container = document.querySelector('.popup-shift');
  const popup = container.querySelector('wa-popup');
  const shift = container.querySelector('wa-switch');

  shift.addEventListener('change', () => (popup.shift = shift.checked));
</script>

Auto-size Jump to heading

Use the auto-size attribute to tell the popup to resize when necessary to prevent it from overflowing. Possible values are horizontal, vertical, and both. You can use autoSizeBoundary and auto-size-padding to customize the behavior of this option. Auto-size works well with flip, but if you're using auto-size-padding make sure flip-padding is the same value.

By default, auto-size takes effect when the popup would overflow the viewport. You can use boundary="scroll" to make the popup resize when it overflows its nearest scrollable container instead.

When using auto-size, one or both of --auto-size-available-width and --auto-size-available-height will be applied to the host element. These values determine the available space the popover has before clipping will occur. Since they cascade, you can use them to set a max-width/height on your popup's content and easily control its overflow.

Scroll the container to see the popup resize as its available space changes.

<div class="popup-auto-size">
  <div class="overflow">
    <wa-popup placement="top" auto-size="both" auto-size-padding="10" active boundary="scroll">
      <span slot="anchor"></span>
      <div class="box"></div>
    </wa-popup>
  </div>

  <br />
  <wa-switch checked>Auto-size</wa-switch>
</div>

<style>
  .popup-auto-size .overflow {
    position: relative;
    height: 300px;
    border: solid 2px var(--wa-color-surface-border);
    overflow: auto;
  }

  .popup-auto-size span[slot='anchor'] {
    display: inline-block;
    width: 150px;
    height: 150px;
    border: dashed 2px var(--wa-color-neutral-fill-loud);
    margin: 250px 50px 100px 50px;
  }

  .popup-auto-size .box {
    background: var(--wa-color-brand-fill-loud);
    border-radius: var(--wa-border-radius-m);

    /* This sets the preferred size of the popup's content */
    width: 100px;
    height: 200px;

    /* This sets the maximum dimensions and allows scrolling when auto-size kicks in */
    max-width: var(--auto-size-available-width);
    max-height: var(--auto-size-available-height);
    overflow: auto;
  }
</style>

<script>
  const container = document.querySelector('.popup-auto-size');
  const popup = container.querySelector('wa-popup');
  const autoSize = container.querySelector('wa-switch');

  autoSize.addEventListener('change', () => (popup.autoSize = autoSize.checked ? 'both' : ''));
</script>

Hover Bridge Jump to heading

When a gap exists between the anchor and the popup element, this option will add a "hover bridge" that fills the gap using an invisible element. This makes listening for events such as mouseover and mouseout more sane because the pointer never technically leaves the element. The hover bridge will only be drawn when the popover is active. For demonstration purposes, the bridge in this example is shown in orange.

<div class="popup-hover-bridge">
  <wa-popup placement="top" hover-bridge distance="10" skidding="0" active>
    <span slot="anchor"></span>
    <div class="box"></div>
  </wa-popup>
  <br />
  <wa-switch checked>Hover Bridge</wa-switch><br />
  <wa-slider min="0" max="50" step="1" value="10" label="Distance"></wa-slider>
  <wa-slider min="-50" max="50" step="1" value="0" label="Skidding"></wa-slider>
</div>
<style>
  .popup-hover-bridge span[slot='anchor'] {
    display: inline-block;
    width: 150px;
    height: 150px;
    border: dashed 2px var(--wa-color-neutral-fill-loud);
    margin: 50px;
  }

  .popup-hover-bridge .box {
    width: 100px;
    height: 50px;
    background: var(--wa-color-brand-fill-loud);
    border-radius: var(--wa-border-radius-m);
  }

  .popup-hover-bridge wa-slider {
    max-width: 260px;
    margin-top: 0.5rem;
  }

  .popup-hover-bridge wa-popup::part(hover-bridge) {
    background: tomato;
    opacity: 0.5;
  }
</style>
<script>
  const container = document.querySelector('.popup-hover-bridge');
  const popup = container.querySelector('wa-popup');
  const hoverBridge = container.querySelector('wa-switch');
  const distance = container.querySelector('wa-slider[label="Distance"]');
  const skidding = container.querySelector('wa-slider[label="Skidding"]');
  distance.addEventListener('input', () => (popup.distance = distance.value));
  skidding.addEventListener('input', () => (popup.skidding = skidding.value));
  hoverBridge.addEventListener('change', () => (popup.hoverBridge = hoverBridge.checked));
</script>

Virtual Elements Jump to heading

In most cases, popups are anchored to an actual element. Sometimes, it can be useful to anchor them to a non-element. To do this, you can pass a VirtualElement to the anchor property. A virtual element must contain a function called getBoundingClientRect() that returns a DOMRect object as shown below.

const virtualElement = {
  getBoundingClientRect() {
    // ...
    return { width, height, x, y, top, left, right, bottom };
  },
};

This example anchors a popup to the mouse cursor using a virtual element. As such, a mouse is required to properly view it.

<div class="popup-virtual-element">
  <wa-popup placement="right-start">
    <div class="circle"></div>
  </wa-popup>

  <wa-switch>Highlight mouse cursor</wa-switch>
</div>

<script>
  const container = document.querySelector('.popup-virtual-element');
  const popup = container.querySelector('wa-popup');
  const circle = container.querySelector('.circle');
  const enabled = container.querySelector('wa-switch');
  let clientX = 0;
  let clientY = 0;

  // Set the virtual element as a property
  popup.anchor = {
    getBoundingClientRect() {
      return {
        width: 0,
        height: 0,
        x: clientX,
        y: clientY,
        top: clientY,
        left: clientX,
        right: clientX,
        bottom: clientY,
      };
    },
  };

  // Only activate the popup when the switch is checked
  enabled.addEventListener('change', () => {
    popup.active = enabled.checked;
  });

  // Listen for the mouse to move
  document.addEventListener('mousemove', handleMouseMove);

  // Update the virtual element as the mouse moves
  function handleMouseMove(event) {
    clientX = event.clientX;
    clientY = event.clientY;

    // Reposition the popup when the virtual anchor moves
    if (popup.active) {
      popup.reposition();
    }
  }
</script>

<style>
  /* If you need to set a z-index, set it on the popup part like this */
  .popup-virtual-element wa-popup::part(popup) {
    z-index: 1000;
    pointer-events: none;
  }

  .popup-virtual-element .circle {
    width: 100px;
    height: 100px;
    border: solid 4px var(--wa-color-neutral-fill-loud);
    border-radius: 50%;
    translate: -50px -50px;
    animation: 1s virtual-cursor infinite;
  }

  @keyframes virtual-cursor {
    0% {
      scale: 1;
    }
    50% {
      scale: 1.1;
    }
  }
</style>

Built-in Animations Jump to heading

The following classes can be applied to the popup's popup part to animate it in or out programmatically. You can control the animation duration with the --show-duration and --hide-duration custom properties.

show / hide - Shows or hides the popover with a fade
show-with-scale / hide-with-scale - Shows or hides the popover with a fade and subtle scale effect

Slots Jump to heading

Learn more about using slots.

Name	Description
(default)	The popup's content.
`anchor`	The element the popup will be anchored to. If the anchor lives outside of the popup, you can use the `anchor` attribute or property instead.

Attributes & Properties Jump to heading

Learn more about attributes and properties.

Name	Description	Reflects
`popup`	A reference to the internal popup container. Useful for animating and styling the popup with JavaScript. Type `HTMLElement`
`anchor` `anchor`	The element the popup will be anchored to. If the anchor lives outside of the popup, you can provide the anchor element `id`, a DOM element reference, or a `VirtualElement`. If the anchor lives inside the popup, use the `anchor` slot instead. Type `Element \| string \| VirtualElement`
`active` `active`	Activates the positioning logic and shows the popup. When this attribute is removed, the positioning logic is torn down and the popup will be hidden. Type `boolean` Default `false`
`placement` `placement`	The preferred placement of the popup. Note that the actual placement will vary as configured to keep the panel inside of the viewport. Type `'top' \| 'top-start' \| 'top-end' \| 'bottom' \| 'bottom-start' \| 'bottom-end' \| 'right' \| 'right-start' \| 'right-end' \| 'left' \| 'left-start' \| 'left-end'` Default `'top'`
`boundary` `boundary`	The bounding box to use for flipping, shifting, and auto-sizing. Type `'viewport' \| 'scroll'` Default `'viewport'`
`distance` `distance`	The distance in pixels from which to offset the panel away from its anchor. Type `number` Default `0`
`skidding` `skidding`	The distance in pixels from which to offset the panel along its anchor. Type `number` Default `0`
`arrow` `arrow`	Attaches an arrow to the popup. The arrow's size and color can be customized using the `--arrow-size` and `--arrow-color` custom properties. For additional customizations, you can also target the arrow using `::part(arrow)` in your stylesheet. Type `boolean` Default `false`
`arrowPlacement` `arrow-placement`	The placement of the arrow. The default is `anchor`, which will align the arrow as close to the center of the anchor as possible, considering available space and `arrow-padding`. A value of `start`, `end`, or `center` will align the arrow to the start, end, or center of the popover instead. Type `'start' \| 'end' \| 'center' \| 'anchor'` Default `'anchor'`
`arrowPadding` `arrow-padding`	The amount of padding between the arrow and the edges of the popup. If the popup has a border-radius, for example, this will prevent it from overflowing the corners. Type `number` Default `10`
`flip` `flip`	When set, placement of the popup will flip to the opposite site to keep it in view. You can use `flipFallbackPlacements` to further configure how the fallback placement is determined. Type `boolean` Default `false`
`flipFallbackPlacements` `flip-fallback-placements`	If the preferred placement doesn't fit, popup will be tested in these fallback placements until one fits. Must be a string of any number of placements separated by a space, e.g. "top bottom left". If no placement fits, the flip fallback strategy will be used instead. Type `string` Default `''`
`flipFallbackStrategy` `flip-fallback-strategy`	When neither the preferred placement nor the fallback placements fit, this value will be used to determine whether the popup should be positioned using the best available fit based on available space or as it was initially preferred. Type `'best-fit' \| 'initial'` Default `'best-fit'`
`flipBoundary` `flipBoundary`	The flip boundary describes clipping element(s) that overflow will be checked relative to when flipping. By default, the boundary includes overflow ancestors that will cause the element to be clipped. If needed, you can change the boundary by passing a reference to one or more elements to this property. Type `Element \| Element[]`
`flipPadding` `flip-padding`	The amount of padding, in pixels, to exceed before the flip behavior will occur. Type `number` Default `0`
`shift` `shift`	Moves the popup along the axis to keep it in view when clipped. Type `boolean` Default `false`
`shiftBoundary` `shiftBoundary`	The shift boundary describes clipping element(s) that overflow will be checked relative to when shifting. By default, the boundary includes overflow ancestors that will cause the element to be clipped. If needed, you can change the boundary by passing a reference to one or more elements to this property. Type `Element \| Element[]`
`shiftPadding` `shift-padding`	The amount of padding, in pixels, to exceed before the shift behavior will occur. Type `number` Default `0`
`autoSize` `auto-size`	When set, this will cause the popup to automatically resize itself to prevent it from overflowing. Type `'horizontal' \| 'vertical' \| 'both'`
`sync` `sync`	Syncs the popup's width or height to that of the anchor element. Type `'width' \| 'height' \| 'both'`
`autoSizeBoundary` `autoSizeBoundary`	The auto-size boundary describes clipping element(s) that overflow will be checked relative to when resizing. By default, the boundary includes overflow ancestors that will cause the element to be clipped. If needed, you can change the boundary by passing a reference to one or more elements to this property. Type `Element \| Element[]`
`autoSizePadding` `auto-size-padding`	The amount of padding, in pixels, to exceed before the auto-size behavior will occur. Type `number` Default `0`
`hoverBridge` `hover-bridge`	When a gap exists between the anchor and the popup element, this option will add a "hover bridge" that fills the gap using an invisible element. This makes listening for events such as `mouseenter` and `mouseleave` more sane because the pointer never technically leaves the element. The hover bridge will only be drawn when the popover is active. Type `boolean` Default `false`

Methods Jump to heading

Learn more about methods.

Name	Description	Arguments
`reposition()`	Forces the popup to recalculate and reposition itself.

Events Jump to heading

Learn more about events.

Name	Description
`wa-reposition`	Emitted when the popup is repositioned. This event can fire a lot, so avoid putting expensive operations in your listener or consider debouncing it.

CSS custom properties Jump to heading

Learn more about CSS custom properties.

Name	Description
`--arrow-size`	The size of the arrow. Note that an arrow won't be shown unless the `arrow` attribute is used. Default `6px`
`--arrow-color`	The color of the arrow. Default `black`
`--auto-size-available-width`	A read-only custom property that determines the amount of width the popup can be before overflowing. Useful for positioning child elements that need to overflow. This property is only available when using `auto-size`.
`--auto-size-available-height`	A read-only custom property that determines the amount of height the popup can be before overflowing. Useful for positioning child elements that need to overflow. This property is only available when using `auto-size`.
`--show-duration`	The show duration to use when applying built-in animation classes. Default `100ms`
`--hide-duration`	The hide duration to use when applying built-in animation classes. Default `100ms`

CSS parts Jump to heading

Learn more about CSS parts.

Name	Description	CSS selector
`arrow`	The arrow's container. Avoid setting `top\|bottom\|left\|right` properties, as these values are assigned dynamically as the popup moves. This is most useful for applying a background color to match the popup, and maybe a border or box shadow.	`::part(arrow)`
`popup`	The popup's container. Useful for setting a background color, box shadow, etc.	`::part(popup)`
`hover-bridge`	The hover bridge element. Only available when the `hover-bridge` option is enabled.	`::part(hover-bridge)`

Importing Jump to heading

Autoloading components via projects is the recommended way to import components. If you prefer to do it manually, use one of the following code snippets.

CDN

npm

React

Let your project code do the work! Sign up for free to use a project with your very own CDN — it's the fastest and easiest way to use Web Awesome.

To manually import this component from NPM, use the following code.

import '@awesome.me/webawesome/dist/components/popup/popup.js';

To manually import this component from React, use the following code.

import WaPopup from '@awesome.me/webawesome/dist/react/popup';

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Popup

Examples Jump to heading

Activating Jump to heading

External Anchors Jump to heading

Placement Jump to heading

Distance Jump to heading

Skidding Jump to heading

Arrows Jump to heading

Flip Jump to heading

Flip Fallbacks Jump to heading

Shift Jump to heading

Auto-size Jump to heading

Hover Bridge Jump to heading

Virtual Elements Jump to heading

Built-in Animations Jump to heading

Slots Jump to heading

Attributes & Properties Jump to heading

Methods Jump to heading

Events Jump to heading

CSS custom properties Jump to heading

CSS parts Jump to heading

Importing Jump to heading

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