Touch: identifier property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
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
Report problems with this compatibility data on GitHubdesktop | mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
identifier |
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
- Partial support
- Partial support
- No support
- No support
- Has more compatibility info.
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.