JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <button class="btn1">Button 1</button>
    <button class="btn2">Button 2</button>
    <button class="btn3">Button 3</button>
</body>

JavaScript

$(function() {
        
        $("body").myplugin( {
            helperFunctions : {
                funcA : function( obj ) {
                    $(obj).text( "Button A" );
                },
                
                funcB : function( obj ) {
                    $(obj).text( "Button B" );
                },
                
                funcC : function( obj ) {
                    $(obj).text("Button C");
                }
            },
            
            handlers : [
                {   on : "click",
                 selector : ".btn1",
                 handlerFunc : function( funcs, obj ){
                     funcs.funcA( obj );
                 }
                 
                },
                
                {   on : "click",
                 selector : ".btn2",
                 handlerFunc : function( funcs, obj ){
                     funcs.funcB( obj );
                 },
                },
                 
                 {
                     on : "click",
                     selector : ".btn3",
                     handlerFunc: function( funcs, obj ) {
                         funcs.funcC( obj );
                    }
                 }
                 
            ]
        });
        
    });

    (function ($) {
        $.fn.extend({
            myplugin: function ( settings ) {
                var $this = $(this);

                function createHandlerFunction( func, obj ){
                    return func( settings.helperFunctions, obj ) ;
                }

                for( var handlerIdx in settings.handlers ){
                    var handler = settings.handlers[ handlerIdx ];
                    $this.on(  handler.on, handler.selector, function() { return createHandlerFunction( handler.handlerFunc, this ) } );
                }
            }
        });
    })(jQuery);