A big step towards enabling strict mode in Typescript.
There was definitely a good share of potential bugs while refactoring
this. When in doubt, I opted to keep the potentially broken behaviour.
Notably, the `DOMEvent` type is gone, it was broken and we're better of
with type assertions on `e.target`.
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Signed-off-by: silverwind <[email protected]>
Signed-off-by: wxiaoguang <[email protected]>
Co-authored-by: delvh <[email protected]>
Co-authored-by: wxiaoguang <[email protected]>
