Returning reference to the screenX object. Use with screenY to get the vertical coordinate as well. relatedTarget number screenX number screenY boolean shiftKey. The HTML DOM MouseEvent screenX property returns the horizontal (x) coordinate of the mouse pointer relative to the users screen display if a mouse event was triggered. When you trap events on the window, document, or other roomy elements, you can get the coordinates of that event (e.g. boolean altKey number button number buttons number clientX number clientY boolean ctrlKey. To display the mouse coordinates click anywhere on the page. See the Browser compatibility section for details. Early versions of the spec defined this as an integer referring to the number of pixels. Syntax var pixelNumber = instanceOfMouseEvent.screenXĪ double floating point value. In this example, when you click the button with your mouse (left-click, right-click, and middle-click), it shows a corresponding message on the element.The screenX read-only property of the MouseEvent property provides the horizontal coordinate (offset) of the mouse pointer in global (screen) coordinates. disable context menu when right-mouse clickedītn.addEventListener( 'contextmenu', (e) => ` let btn = document.querySelector( '#btn') JS Mouse Events - Button Demo Click me with any mouse button: left, right, middle. Then, register the mouse event using the addEventListener() method.įor example, suppose that you have the following button:.First, select the element by using querySelector() or getElementById() method.To register a mouse event, you use these steps: The mouseleave fires when the mouse cursor is over an element and then moves to the outside of the element’s boundaries.īoth mouseenter and mouseleave does not bubble and does not fire when the mouse cursor moves over descendant elements. The mouseenter fires when the mouse cursor is outside of an element and then moves to inside the boundaries of the element. The mouseout fires when the mouse cursor is over an element and then moves another element. The mouseover fires when the mouse cursor is outside of the element and then move to inside the boundaries of the element. NEW MOUSEEVENT SCREENX SCREENY CODEIt will cause the page slow, therefore, you only register mousemove event handler only when you need it and immediately remove the event handler as soon as it is no longer used, like this:Įlement.onmousemove = mouseMoveEventHandler Įlement.onmousemove = null Code language: JavaScript ( javascript ) mouseover / mouseout Even when you move the mouse one pixel, the mousemove event still fires. The mousemove event fires repeatedly when you move the mouse cursor around an element. If you register both click and dblclick event handlers on the same element, you will not know exactly what user actually has clicked or double-clicked the element. The dblclick event has four events fired in the following order:Īs you can see, the click events always take place before the dblclick event. It takes two click events to cause a dblclick event to fire. The dblclick event fires when you double click over an element. In practice, you rarely use the dblclick event. In both cases, the click event never fires. Likewise, if you depress the mouse button, move the mouse over the element, and release the mouse button, the only mouseup event fires on the element. The only mousedown event fires on the element. If you depress the mouse button on an element and move your mouse off the element, and then release the mouse button. The click fires when one mousedown and one mouseup detected on the element.The mouseup fires when you release the mouse button on the element.Syntax var pixelNumber instanceOfMouseEvent. The mousedown fires when you depress the mouse button on the element. The MouseEvent.screenX read-only property provides the horizontal coordinate of the mouse pointer in global (screen) coordinates.When you click an element, there are no less than three mouse events fire in the following sequence: DOM Level 3 events define nine mouse events. Mouse events fire when you use the mouse to interact with the elements on the page. Summary: in this tutorial, you will learn about the basic mouse events and their properties in JavaScript.
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