Element: mouseleave event

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("mouseleave", (event) => { })

onmouseleave = (event) => { }

Event type

A MouseEvent. Inherits from UIEvent and Event.

Event properties

This interface also inherits properties of its parents, UIEvent and Event.

MouseEvent.altKey Read only

Returns true if the alt key was down when the mouse event was fired.

MouseEvent.button Read only

The button number that was pressed (if applicable) when the mouse event was fired.

MouseEvent.buttons Read only

The buttons being pressed (if any) when the mouse event was fired.

MouseEvent.clientX Read only

The X coordinate of the mouse pointer in viewport coordinates.

MouseEvent.clientY Read only

The Y coordinate of the mouse pointer in viewport coordinates.

MouseEvent.ctrlKey Read only

Returns true if the control key was down when the mouse event was fired.

MouseEvent.layerX Non-standard Read only

Returns the horizontal coordinate of the event relative to the current layer.

MouseEvent.layerY Non-standard Read only

Returns the vertical coordinate of the event relative to the current layer.

MouseEvent.metaKey Read only

Returns true if the meta key was down when the mouse event was fired.

MouseEvent.movementX Read only

The X coordinate of the mouse pointer relative to the position of the last mousemove event.

MouseEvent.movementY Read only

The Y coordinate of the mouse pointer relative to the position of the last mousemove event.

MouseEvent.offsetX Read only

The X coordinate of the mouse pointer relative to the position of the padding edge of the target node.

MouseEvent.offsetY Read only

The Y coordinate of the mouse pointer relative to the position of the padding edge of the target node.

MouseEvent.pageX Read only

The X coordinate of the mouse pointer relative to the whole document.

MouseEvent.pageY Read only

The Y coordinate of the mouse pointer relative to the whole document.

MouseEvent.relatedTarget Read only

The secondary target for the event, if there is one.

MouseEvent.screenX Read only

The X coordinate of the mouse pointer in screen coordinates.

MouseEvent.screenY Read only

The Y coordinate of the mouse pointer in screen coordinates.

MouseEvent.shiftKey Read only

Returns true if the shift key was down when the mouse event was fired.

MouseEvent.mozInputSource Non-standard Read only

The type of device that generated the event (one of the MOZ_SOURCE_* constants). This lets you, for example, determine whether a mouse event was generated by an actual mouse or by a touch event (which might affect the degree of accuracy with which you interpret the coordinates associated with the event).

MouseEvent.webkitForce Non-standard Read only

The amount of pressure applied when clicking.

MouseEvent.x Read only

Alias for MouseEvent.clientX.

MouseEvent.y Read only

Alias for MouseEvent.clientY.

Behavior of mouseleave events

One mouseleave event is sent to each element of the hierarchy when leaving them. Here four events are sent to the four elements of the hierarchy when the pointer moves from the text to an area outside of the most outer div represented here.

Behavior of mouseout events

One single mouseout event is sent to the deepest element of the DOM tree, then it bubbles up the hierarchy until it is canceled by a handler or reaches the root.

Examples

The mouseout documentation has an example illustrating the difference between mouseout and mouseleave.

mouseleave

The following trivial example uses the mouseenter event to change the border on the <div> when the mouse enters the space allotted to it. It then adds an item to the list with the number of the mouseenter or mouseleave event.

HTML

<div id="mouseTarget">
  <ul id="unorderedList">
    <li>No events yet!</li>
  </ul>
</div>

CSS

Styling the <div> to make it more visible.

#mouseTarget {
  box-sizing: border-box;
  width: 15rem;
  border: 1px solid #333333;
}

JavaScript

let enterEventCount = 0;
let leaveEventCount = 0;
const mouseTarget = document.getElementById("mouseTarget");
const unorderedList = document.getElementById("unorderedList");

mouseTarget.addEventListener("mouseenter", (e) => {
  mouseTarget.style.border = "5px dotted orange";
  enterEventCount++;
  addListItem(`This is mouseenter event ${enterEventCount}.`);
});

mouseTarget.addEventListener("mouseleave", (e) => {
  mouseTarget.style.border = "1px solid #333333";
  leaveEventCount++;
  addListItem(`This is mouseleave event ${leaveEventCount}.`);
});

function addListItem(text) {
  // Create a new text node using the supplied text
  const newTextNode = document.createTextNode(text);

  // Create a new li element
  const newListItem = document.createElement("li");

  // Add the text node to the li element
  newListItem.appendChild(newTextNode);

  // Add the newly created list item to list
  unorderedList.appendChild(newListItem);
}

Result

Specifications

Browser compatibility

See also

• Learn: Introduction to events
• mousedown
• mouseup
• mousemove
• click
• dblclick
• mouseover
• mouseout
• mouseenter
• contextmenu
• pointerleave