Themouseout event is fired at anElement when a pointing device (usually a mouse) is used to move the cursor so that it is no longer contained within the element or one of its children.

mouseout is also delivered to an element if the cursor enters a child element, because the child element obscures the visible area of the element.

If the target element has child elements,mouseout andmouseover events fire as the mouse moves over the boundaries of these elements too, not just the target element itself. Usually,mouseenter andmouseleave events' behavior is more sensible, because they are not affected by moving into child elements.

Syntax

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

addEventListener("mouseout", (event) => { })onmouseout = (event) => { }

Event type

AMouseEvent. Inherits fromUIEvent andEvent.

Event properties

This interface also inherits properties of its parents,UIEvent andEvent.

MouseEvent.altKeyRead only

Returnstrue if thealt key was down when the mouse event was fired.

MouseEvent.buttonRead only

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

MouseEvent.buttonsRead only

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

MouseEvent.clientXRead only

The X coordinate of the mouse pointer inviewport coordinates.

MouseEvent.clientYRead only

The Y coordinate of the mouse pointer inviewport coordinates.

MouseEvent.ctrlKeyRead only

Returnstrue if thecontrol key was down when the mouse event was fired.

MouseEvent.layerXNon-standardRead only

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

MouseEvent.layerYNon-standardRead only

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

MouseEvent.metaKeyRead only

Returnstrue if themeta key was down when the mouse event was fired.

MouseEvent.movementXRead only

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

MouseEvent.movementYRead only

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

MouseEvent.offsetXRead only

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

MouseEvent.offsetYRead only

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

MouseEvent.pageXRead only

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

MouseEvent.pageYRead only

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

MouseEvent.relatedTargetRead only

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

MouseEvent.screenXRead only

The X coordinate of the mouse pointer inscreen coordinates.

MouseEvent.screenYRead only

The Y coordinate of the mouse pointer inscreen coordinates.

MouseEvent.shiftKeyRead only

Returnstrue if theshift key was down when the mouse event was fired.

MouseEvent.mozInputSourceNon-standardRead only

The type of device that generated the event (one of theMOZ_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.webkitForceNon-standardRead only

The amount of pressure applied when clicking.

MouseEvent.xRead only

Alias forMouseEvent.clientX.

MouseEvent.yRead only

Alias forMouseEvent.clientY.

Examples

The following examples show the use of themouseout event.

mouseout and mouseleave

The following example illustrates the difference betweenmouseout andmouseleave events. Themouseleave event is added to the<ul> to color the list purple whenever the mouse exits the<ul>.mouseout is added to the list to color the targeted element orange when the mouse exits it.

When you try this out, you'll find thatmouseout is delivered to the individual list items, whilemouseleave goes to the overall list, courtesy of the hierarchy of the items and the fact that list items obscure the underlying<ul>.

HTML

<ul>  <li>item 1</li>  <li>item 2</li>  <li>item 3</li></ul>

JavaScript

const test = document.getElementById("test");// Briefly make the list purple when the mouse moves off the// <ul> elementtest.addEventListener("mouseleave", (event) => {  // highlight the mouseleave target  event.target.style.color = "purple";  // reset the color after a short delay  setTimeout(() => {    event.target.style.color = "";  }, 1000);});// Briefly make an <li> orange when the mouse moves off of ittest.addEventListener("mouseout", (event) => {  // highlight the mouseout target  event.target.style.color = "orange";  // reset the color after a short delay  setTimeout(() => {    event.target.style.color = "";  }, 500);});

Result

Specifications

Browser compatibility

See also

• Learn: Introduction to events
• mousedown
• mouseup
• mousemove
• click
• dblclick
• mouseover
• mouseenter
• mouseleave
• contextmenu
• pointerout