JSFiddle - React, Tailwind, and code Playground

HTML

<p>You will receive an alert with the text "submitted" on clicking the submit button or hitting the enter key while in the input box.</p>

<input id="input" type="text" /><button id="button">Submit</button>

JavaScript

(function ($) {

    $.prototype.enterPressed = function (fn) {
        $(this).keyup(function(e) {
            if ((e.keyCode || e.which) == 13) {
                fn();
            }
        });
    };

}(jQuery || {}));

function submitted() {
    alert('submitted');
}

$("#input").enterPressed(submitted);
$("#button").click(submitted);