JSFiddle - React, Tailwind, and code Playground

HTML

<input id="textCommand" type="text"><br/>

JavaScript

$('#textCommand').on('keypress', function(e) {
		if(e.keyCode==13) {
			sendConsole();
		}
	});

var user = {};

var sendConsole = function() {
	value = $('#textCommand').val();
	if (value.substring(0,1) === "/") {
        alert(value);
	} else {
        $('body').append("<span>unknown command: "+value+"</span><br />")
		$('#textCommand').val("");
	}
}