JSFiddle - React, Tailwind, and code Playground

by Jon Kittell

HTML

<p id="message" onclick="write"></p>

JavaScript

function write(message) {
    document.getElementById('message').innerHTML += message + '<br/>';
}

var streetNumber = 49;

var streetName = "Brunswick";

write(typeof streetNumber + " " + streetNumber);

write(typeof streetName + " " + streetName);

function add(first, second) {
    var a = first;
    return a + second;
}

write("1 + 2 = " + add(1,2));
write("54 + 18 = " + add(54,18));


if (!window.a) {
    write("a is undefined")
}


var myValue = null;

if (!myValue) {
    write("null evaluates to false");
}

var hasAValue = 1;

// check if a variable has a value
if (hasAValue) {
    write("hasAValue has a value");
}