Element: evento mouseover

Sintaxe

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

addEventListener("mouseover", (event) => {});

onmouseover = (event) => {};

Tipo de evento

A MouseEvent. Inherits from UIEvent and Event.

Propriedades de evento

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

MouseEvent.altKey Somente leitura

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

MouseEvent.button Somente leitura

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

MouseEvent.buttons Somente leitura

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

MouseEvent.clientX Somente leitura

The X coordinate of the mouse pointer in viewport coordinates.

MouseEvent.clientY Somente leitura

The Y coordinate of the mouse pointer in viewport coordinates.

MouseEvent.ctrlKey Somente leitura

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

MouseEvent.layerX Não padrão Somente leitura

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

MouseEvent.layerY Não padrão Somente leitura

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

MouseEvent.metaKey Somente leitura

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

MouseEvent.movementX Somente leitura

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

MouseEvent.movementY Somente leitura

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

MouseEvent.offsetX Somente leitura

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

MouseEvent.offsetY Somente leitura

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

MouseEvent.pageX Somente leitura

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

MouseEvent.pageY Somente leitura

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

MouseEvent.relatedTarget Somente leitura

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

MouseEvent.screenX Somente leitura

The X coordinate of the mouse pointer in screen coordinates.

MouseEvent.screenY Somente leitura

The Y coordinate of the mouse pointer in screen coordinates.

MouseEvent.shiftKey Somente leitura

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

MouseEvent.mozInputSource Não padrão Somente leitura

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 Não padrão Somente leitura

The amount of pressure applied when clicking.

MouseEvent.x Somente leitura

Alias for MouseEvent.clientX.

MouseEvent.y Somente leitura

Alias for MouseEvent.clientY.

Exemplos

The following example illustrates the difference between mouseover and mouseenter events.

HTML

<ul id="test">
  <li>item 1</li>
  <li>item 2</li>
  <li>item 3</li>
</ul>

JavaScript

const test = document.getElementById("test");

// This handler will be executed only once when the cursor
// moves over the unordered list
test.addEventListener(
  "mouseenter",
  (event) => {
    // highlight the mouseenter target
    event.target.style.color = "purple";

    // reset the color after a short delay
    setTimeout(() => {
      event.target.style.color = "";
    }, 500);
  },
  false,
);

// This handler will be executed every time the cursor
// is moved over a different list item
test.addEventListener(
  "mouseover",
  (event) => {
    // highlight the mouseover target
    event.target.style.color = "orange";

    // reset the color after a short delay
    setTimeout(() => {
      event.target.style.color = "";
    }, 500);
  },
  false,
);

Resultado

Especificações

Compatibilidade com navegadores

Veja também

• Introdução a eventos
• mousedown
• mouseup
• mousemove
• click
• dblclick
• mouseover
• mouseout
• mouseenter
• mouseleave
• contextmenu