what would i use to make a little reaction timer

[Waru]

using javascript to make a little web page that lets you test your reaction time in accordance to a school project, but I don't know how I would go about making a high score list to have the top 10-20 lowest reactions times. This would obviously have to be server side but could I do it on my computer (using three chromebooks at school) or buy a cheap server for a bit? would i be using node.js? websockets? idk any of this SHEIT

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[Rednakin]

There's some website on the internet that gives server space for leaderboards. I don't remember what it's called but it's mentioned in Sebastian Lague's latest video on YT.

There's already some websites that do reaction tests etc, you might wanna look into how they work.