This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The Touch.force read-only property returns the amount of pressure the user is applying to the touch surface for a Touch point.

Syntax

touchItem.force;

Return value

A float that represents the amount of pressure the user is applying to the touch surface. This is a value between 0.0 (no pressure) and 1.0 (the maximum amount of pressure the hardware can recognize). A value of 0.0 is returned if no value is known (for example the touch device does not support this property). In environments where force is known, the absolute pressure represented by the force attribute, and the sensitivity in levels of pressure, may vary.

Example

This example illustrates using the Touch interface's Touch.force property. This property is a relative value of pressure applied, in the range 0.0 to 1.0, where 0.0 is no pressure, and 1.0 is the highest level of pressure the touch device is capable of sensing.

In following code snippet, the touchstart event handler iterrates through the targetTouches list and logs the force value of each touch point but the code could invoke different processing depending on the value.

someElement.addEventListener('touchstart', function(e) {
   // Iterate through the list of touch points and log each touch 
   // point's force.
   for (var i=0; i < e.targetTouches.length; i++) {
     // Add code to "switch" based on the force value. For example
     // minimum pressure vs. maximum pressure could result in  
     // different handling of the user's input.
     console.log("targetTouches[" + i + "].force = " + e.targetTouches[i].force);
   }   
}, false);

Specifications

Specification Status Comment
Touch Events – Level 2 Draft Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic support
Experimental
Chrome Full support YesEdge ? Firefox Full support YesIE ? Opera ? Safari ? WebView Android Full support YesChrome Android Full support YesEdge Mobile ? Firefox Android Full support YesOpera Android ? Safari iOS Full support YesSamsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

Document Tags and Contributors

Last updated by: fscholz,