Touch: identifier property
The Touch.identifier
returns a value uniquely identifying
this point of contact with the touch surface. This value remains consistent for every
event involving this finger's (or stylus's) movement on the surface until it is lifted
off the surface.
Value
A long
that represents the unique ID of the Touch
object.
Examples
js
someElement.addEventListener(
"touchmove",
(e) => {
// Iterate through the list of touch points that changed
// since the last event and print each touch point's identifier.
for (let i = 0; i < e.changedTouches.length; i++) {
console.log(
`changedTouches[${i}].identifier = ${e.changedTouches[i].identifier}`,
);
}
},
false,
);
Specifications
Specification |
---|
Touch Events # dom-touch-identifier |
Browser compatibility
BCD tables only load in the browser