Well I now decided to update past version 0.131.0 from flow. However this has the following breaking change:
Disallow using any-typed values type annotations.
(https://github.com/facebook/flow/releases/tag/v0.132.0)
This leads to a break with SyntheticEvent in the following context:
function requestRemove(ev: SyntheticEvent<HTMLElement>, extra_option: ExtraOptionSchema) {
ev.stopPropagation();
//more code
}
The error shown:
Error:(124, 41) Cannot use `SyntheticEvent` as a type because it is an `any`-typed value. Type `SyntheticEvent` properly, so it is no longer `any`-typed, to use it as an annotation.
If I remove the ev.stopPropagation() (and all other reference to the event such a ev.currentTarget) it works perfectly fine, no error is shown at all. (PS: the error is shown in 0.140.0 however manual testing shows it persist until I go back to version 0.131.0, which coincides with the changelog exempt above).
React is imported by:
import * as React from 'react';
And I've also tried to be more explicit by stating the type as: React.SyntheticEvent<HTMLElement> or SyntheticInputEvent<HTMLElement>. But this gave the error:
Error:(124, 47) Cannot get `React.SyntheticEvent` because property `SyntheticEvent` is missing in module `react` [1].