fix(useKeyModifier): getModifierState is not a function

[okxiaoliang4]

Description

fixes: #1440

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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[antfu]

Not sure. I guess we could have an isSupported flag, instead of silently failing in production.

[okxiaoliang4]

I'm guessing that the problem may also occur when non-keyboard or mouse events are passed in here.

[antfu]

Oh I see. I think instead we shouldn't listen to 'mousedown' and 'mouseup' since they have no effects anyway

[okxiaoliang4]

Oh I see. I think instead we shouldn't listen to 'mousedown' and 'mouseup' since they have no effects anyway

For example, if you press ctrl when the browser is out of focus, the mousedown event can update the state when you click on the page