Baseline Widely available
The WheelEvent.deltaX
read-only property is a double
representing the horizontal scroll amount in the WheelEvent.deltaMode
unit.
You must check the deltaMode
property to determine the unit of the deltaX
value. Do not assume that the deltaX
value is specified in pixels. Some browsers, for compatibility reasons, may return different units for the deltaX
value depending on whether deltaMode
has been accessed, to accommodate for websites not explicitly checking the deltaMode
property.
A number.
Examplesconst syntheticEvent = new WheelEvent("syntheticWheel", {
deltaX: 4,
deltaMode: 0,
});
console.log(syntheticEvent.deltaX);
Specifications Browser compatibility See also
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