JSFiddle - React, Tailwind, and code Playground

by zaibtabs

HTML

<div id="banner-message">
  <p>Hello Champion</p>
  <button>Trim!</button>
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#banner-message {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  font-size: 25px;
  text-align: center;
  transition: all 0.2s;
  margin: 0 auto;
  width: 300px;
}

button {
  background: #0084ff;
  border: none;
  border-radius: 5px;
  padding: 8px 14px;
  font-size: 15px;
  color: #fff;
}

#banner-message.alt {
  background: #0084ff;
  color: #fff;
  margin-top: 40px;
  width: 200px;
}

#banner-message.alt button {
  background: #fff;
  color: #000;
}

JavaScript

// find elements
var banner = $("#banner-message")
var button = $("button")

// handle click and add class
button.on("click", function() {
  testTrim(null);
  testTrim(undefined);
  testTrim('    Test!');
})

function testTrim(myString) {
  var myStringTrimmed = $.trim(myString);

  if (myStringTrimmed == null) {
    console.log('Null!');
  }

  if (myStringTrimmed == undefined) {
    console.log('Undefined!');
  }

  if (myStringTrimmed == '') {
    console.log('Empty string!');
  } else {
    console.log(myStringTrimmed);
  }
}