JSFiddle - React, Tailwind, and code Playground

JavaScript

var el = $(document)
        el.on("keydown",function (e) {
           console.log("First Handler"); 
        });
        
        var h = jQuery._data( document, "events" ).keydown[0].handler;
        /*
        Used to be el.data("events") 
        */
   
        el.off("keydown",h)
        
        el.on("keydown",function (e) {
            console.log("Second Handler")
            h(e);
        });
        
        //Second Handler
        //First Handler