Style to indicate that an event extends past the end of the visible range

[mr-siro]

Checklist

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Is this feature for a specific connector (React/Angular/etc)?

React

Feature Description

I want to customize the style of the event. If it lasts for 1 week or 1 month, its starting part will be in the form of an arrow on the right, the part extending to the next week or next month will be in the form of an arrow on the left like this: picture above.