dom / latest / touch / screenx.html /

Touch.screenX

Summary

Returns the X coordinate of the touch point relative to the screen, not including any scroll offset.

Value

A number.

Examples

This example illustrates how to access the Touch object's Touch.screenX and Touch.screenY properties. The Touch.screenX property is the horizontal (x) coordinate of a touch point relative to the screen in CSS pixels. The Touch.screenY property is the vertical coordinate of a touch point relative to the screen in CSS pixels.

In following simple code snippet, we assume the user initiates multiple touch contacts on an element with an id of source and then releases contacts with the surface. When the touchstart event handler is invoked, each touch point's Touch.screenX and Touch.screenY coordinates are accessed.

// Register a touchstart listeners for the 'source' element
var src = document.getElementById("source");

src.addEventListener('touchstart', function(e) {
  // Iterate through the touch points and log each screenX/Y coordinate.
  // The unit of each coordinate is CSS pixels.
  var i;
  for (i=0; i < e.touches.length; i++) {
    console.log("touchpoint[" + i + "].screenX = " + e.touches[i].screenX);
    console.log("touchpoint[" + i + "].screenY = " + e.touches[i].screenY);
  }
}, false);

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
screenX
22
≤18
52
18-24
Removed in bug 888304 due to web compatibility issues.
No
15
No
≤37
25
6
14
10
1.5

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https://developer.mozilla.org/en-US/docs/Web/API/Touch/screenX