GlobalEventHandlers.onmousemove

The onmousemove property of the GlobalEventHandlers mixin is an event handler that processes mousemove events.

The mousemove event fires when the user moves the mouse.

Syntax

target.onmousemove = functionRef;

Value

functionRef is a function name or a function expression. The function receives a MouseEvent object as its sole argument.

Examples

Tooltips

This example creates link tooltips that follow your mouse. It uses the onmousemove, onmouseover, and onmouseout event handlers.

HTML

<p><a href="#" data-tooltip="First link">See a tooltip here &hellip;</a></p>
<p><a href="#" data-tooltip="Second link">&hellip; or here!</a></p>

CSS

.tooltip {
  position: absolute;
  z-index: 9999;
  padding: 6px;
  background: #ffd;
  border: 1px #886 solid;
  border-radius: 5px;
}

JavaScript

const tooltip = new (function() {
  const node = document.createElement('div');
  node.className = 'tooltip';
  node.setAttribute('hidden', '');
  document.body.appendChild(node);

  this.follow = function(event) {
    node.style.left = event.clientX + 20 + 'px';
    node.style.top = event.clientY + 10 + 'px';
  };

  this.show = function(event) {
    node.textContent = event.target.dataset.tooltip;
    node.removeAttribute('hidden');
  };

  this.hide = function() {
    node.setAttribute('hidden', '');
  };
})();

const links = document.querySelectorAll('a');

links.forEach(link => {
  link.onmouseover = tooltip.show;
  link.onmousemove = tooltip.follow;
  link.onmouseout = tooltip.hide;
});

Result

Draggable elements

We also have an example available showing the use of the onmousemove event handler with draggable objects — view the example in action.

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
onmousemove
1
12
9
4
≤12.1
1
1
18
9
≤12.1
1
1.0

See also

© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers/onmousemove