Call JS function from Unity Script,How to call a JS Function from a Unity Script?

Hi, i try to call JS functions from Unity Script. I've tried some solutions, but none of them worked. When I try the solution from the official documentation, it doesn't work. https://docs.unity3d.com/Manual/webgl-interactingwithbrowserscripting.html The ultimate goal is to send/receive easily message from both JS and Unity. I need your help ! Thanks