JSFiddle - React, Tailwind, and code Playground

HTML

<form id="mmd-support-form" action="">

    <input name="test" value="" placeholder="focus me"/>
    <div style="display:none;" id="message_test"><p>lorem ipsum dolor</p></div>
</form>

JavaScript

var IndexCheckValues = (function ( $, undefined ) {

        var _ = {
            forbiddenKeys : [
                9, 16, 13, 38, 40
            ]
        };

        return {

            timeout : null,
            form : '#mmd-support-form',
            onReady : function () {
                this.element = $( this.form );
                this.bind();
                console.log(this.element)
            },
            bind : function () {
                var el = this.element,
                    that = this;
                
                el.find( 'input, textarea, select' )
                    .on( 'focus', function ( ev ) {
                    
                        var $this = $( this );
                        
                        $( '#message_'+ this.name ).show();
                        console.log($( '#message_'+ this.name ))
                        
                        that.highlight( $this )
                            .bindOnce( $this )
                    });
            
            },
            bindOnce : function ( el ) {
                el = el || $();
                
                var that = this;
                
                el.one( 'keyup', function( ev ) {
                        if( $.inArray( ev.which, _.forbiddenKeys ) === -1) {
                            return;
                        }
                        var $this = $( this );
                            
                        ev.preventDefault();
                        
                        that.timeout = setTimeout(function () {
                            doPost( this.name );
                        }, 3000);
                        
                        $( '#message_'+ $this.attr( 'name' ) )
                            .removeAttr("class")
                            .addClass('mmd-divmessage-proof')
                            .text('LOADING');
                        
                    })
                    .one( 'keydown', function()...