JavaScript Properties and Methods for Touch
objects
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Some properties of TouchEvent
objects within the JavaScript
DOM involve
Touch objects. These represent a single contact point on a touch-sensitive
device. Touch objects support the following properties and methods:
Properties:
|
Property
|
Description
|
More
|
|
clientX
|
x-coordinate of touch
point relative to left edge of browser viewport
|
|
|
clientY
|
y-coordinate of touch
point relative to left edge of browser viewport
|
|
|
identifier
|
A unique identified
assigned to a touch point, which it will retain for the duration of its
movement around the surface
|
|
|
pageX
|
x-coordinate of touch
point relative to left edge of page / document
|
|
|
pageY
|
y-coordinate of touch
point relative to top edge of page / document
|
|
|
screenX
|
x-coordinate of touch
point relative to left edge of screen
|
|
|
screenY
|
y-coordinate of touch
point relative to top edge of screen
|
|
|
target
|
Element on which the
touch point started when first placed on surface
|
|
There are also some
(currently) experimental properties such as radiusX,
radiusY, rotationAngle (relate to ellipse that most closely
describes area of contact between user and surface) and force (amount of pressure being applied to surface by the
user, between 0 and 1).
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