![]() ![]() The result is that we stop tracking that touchpoint. This is very similar to the previous function the only real differences are that we draw a small square to mark the end and that when we call Array.splice(), we remove the old entry from the ongoing touch list, without adding in the updated information. changedTouches for ( let i = 0 i < touches. getElementById ( "canvas" ) const ctx = el. preventDefault ( ) log ( "touchstart." ) const el = document. The Touch interface, which represents a single touchpoint, includes information such as the position of the touch point relative to the browser viewport. ![]() The TouchEvent interface encapsulates all of the touchpoints that are currently active. Touch events are similar to mouse events except they support simultaneous touches and at different locations on the touch surface. During this interaction, an application receives touch events during the start, move, and end phases. The interaction ends when the fingers are removed from the surface. ![]() Other fingers may subsequently touch the surface and optionally move across the touch surface. A multi-touch interaction starts when a finger (or stylus) first touches the contact surface. The touch events interfaces are relatively low-level APIs that can be used to support application-specific multi-touch interactions such as a two-finger gesture. To provide quality support for touch-based user interfaces, touch events offer the ability to interpret finger (or stylus) activity on touch screens or trackpads. ![]()
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