GlobalEventHandlers.onmousemove

The onmousemove property of the GlobalEventHandlers mixin is an EventHandler 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

Specification Status Comment
HTML Living Standard
The definition of 'onmousemove' in that specification.
Living Standard

Browser compatibility

BCD tables only load in the browser

See also