The WheelEvent.deltaMode read-only property returns an unsigned long representing the unit of the delta values scroll amount. Permitted values are:
| Constant | Value | Description |
|---|---|---|
DOM_DELTA_PIXEL | 0x00 | The delta values are specified in pixels. |
DOM_DELTA_LINE | 0x01 | The delta values are specified in lines. |
DOM_DELTA_PAGE | 0x02 | The delta values are specified in pages. |
An unsigned long.
js
const syntheticEvent = new WheelEvent("syntheticWheel", { deltaX: 4, deltaMode: 0, }); console.log(syntheticEvent.deltaMode);
| Specification |
|---|
| UI Events # dom-wheelevent-deltamode |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
deltaMode |
26 | 12 | 17 | 9 | 15 | 7 | 4.4 | 26 | 17 | 14 | 7 | 1.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/WheelEvent/deltaMode