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

Khalid S Nabhani
seal-mask
.a{fill-rule:evenodd;}techdegree
Khalid S Nabhani
Full Stack JavaScript Techdegree Student 13,008 Points

function isValidHex(text) { const hexRegEx = /^#[1-9a-fA-f]{6}/; return regex.test(text); } would not work

the regex that i creat woulkd not work i dont know why

app.js
// Type inside this function
function isValidHex(text) {
  const hexRegEx = /^#[1-9a-fA-f]{6}/;
 return regex.test(text);
}

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)";
  }
});
index.html
<!DOCTYPE html>
<html>

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

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

</html>

2 Answers

Khalid S Nabhani
seal-mask
.a{fill-rule:evenodd;}techdegree
Khalid S Nabhani
Full Stack JavaScript Techdegree Student 13,008 Points

I just updated to the follwing RegEx and i got this error : Bummer: Your regular expression matches CSS hexadecimal color values, but also matches other values. See if you can limit your regex to meet the requirements.

function isValidHex(text) { const hexRegEx = /#[0-9a-fA-F]{6}/; return hexRegEx.test(text);

}