MouseWheelEvent.wheelDelta is not defined

[mjbvz]

TypeScript Version: 3.2.0-dev.20181110

Search Terms:

• dom.d.ts
• mousewheelevent

Problem

microsoft/TypeScript-DOM-lib-generator#579 removes the definition for MouseWheelEvent,wheelDelta

Although this property is deprecated non-standard (https://developer.mozilla.org/en-US/docs/Web/API/MouseWheelEvent) it was being used in the VS Code code base and potentially elsewhere.

I'll see if VS Code can migrate to use the standard WheelEvent but am not sure if the current breaking change on MouseWheelEvent is correct.

[weswigham]

cc @DanielRosenwasser looks like I was wrong and it was still in their live codebase. 😄 I believe you already had plans around this?

[DanielRosenwasser]

@sandersn let's discuss tomorrow.

[DanielRosenwasser]

I think the break is intentional and the workaround should be fairly straightforward for most users.