I'm trying to limit the amount of characters that are entered into a textbox upon keydown/keyup. I have a working piece of javascript as well as a working onkeydown and onkeyup javascript function ...
> 原文:[https://www . geeksforgeeks . org/onkey press-onkey up-and-onkey down-events-in-JavaScript/](https://www.geeksforgeeks.org/onkeypress-onkeyup-and-onkeydown ...
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