Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript Regular Expressions in JavaScript Validating a Form Form Validation

zayvion blue
zayvion blue
5,970 Points

trying to answer question 2 with "return text.test(hexRegEx);" isn't working pls help.

this is stopping me from moving onto the next section

// Type inside this function
function isValidHex(text) {
     const hexRegEx = /^#[a-f0-9]{6}$/i;
     return text.test(hexRegEx);

const hex = document.getElementById("hex");
const body = document.getElementsByTagName("body")[0];

hex.addEventListener("input", e => {
  const text = e.target.value;
  const valid = isValidHex(text);
  if (valid) {
    body.style.backgroundColor = "rgb(176, 208, 168)";
  } else {
    body.style.backgroundColor = "rgb(189, 86, 86)";
<!DOCTYPE html>

    <title>DOM Manipulation</title>
<link rel="stylesheet" href="style.css" />

    <div id="content">
        <p>Enter a valid hex value below to make the screen turn green.</p>
        <input type="text" id="hex">
    <script src="app.js"></script>


1 Answer

Steven Parker
Steven Parker
229,645 Points

You're close, but have the calling syntax reversed. The method should be called on the regex variable, and the string should be passed as the argument:

     return hexRegEx.test(text);