The Touch.clientX
read-only property returns the X coordinate of the touch point relative to the viewport, not including any scroll offset.
The Touch.clientX
read-only property returns the X coordinate of the touch point relative to the viewport, not including any scroll offset.
A long
representing the X coordinate of the touch point relative to the viewport, not including any scroll offset.
This example illustrates using the Touch
object's Touch.clientX
and Touch.clientY
properties. The Touch.clientX
property is the horizontal coordinate of a touch point relative to the browser's viewport excluding any scroll offset. The Touch.clientY
property is the vertical coordinate of the touch point relative to the browser's viewport excluding any scroll offset .
In this example, we assume the user initiates a touch on an element with an id of source
, moves within the element or out of the element and then releases contact with the surface. When the touchend
event handler is invoked, the changes in the Touch.clientX
and Touch.clientY
coordinates, from the starting touch point to the ending touch point, are calculated.
js
// Register touchstart and touchend listeners for element 'source' const src = document.getElementById("source"); let clientX; let clientY; src.addEventListener( "touchstart", (e) => { // Cache the client X/Y coordinates clientX = e.touches[0].clientX; clientY = e.touches[0].clientY; }, false, ); src.addEventListener( "touchend", (e) => { let deltaX; let deltaY; // Compute the change in X and Y coordinates. // The first touch point in the changedTouches // list is the touch point that was just removed from the surface. deltaX = e.changedTouches[0].clientX - clientX; deltaY = e.changedTouches[0].clientY - clientY; // Process the data… }, false, );
Specification |
---|
Touch Events # dom-touch-clientx |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
clientX |
22 | ≤18 |
52This interface is only exposed if a touch input device is detected.18–24Removed in bug 888304 due to web compatibility issues. |
No | 15 | No | 4.4 | 25 | 6 | 14 | 10 | 1.5 |
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https://developer.mozilla.org/en-US/docs/Web/API/Touch/clientX