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JavaScript Regular Expressions in JavaScript Validating a Form Form Validation

Posted by Kelinia Johnson
Kelinia Johnson
10,189 Points

In this challenge you'll write a validator for a hexadecimal string used to set a CSS color. Hexadecimal values for css

Still not right! I need to see the right regex please!

app.js 
// Type inside this function
function isValidHex(text) {
const hexRegEx = /^(#)[d\a-f]{6}$/i
}

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>

1 Answer

jb30
jb30
44,806 Points
jb30
jb30
44,806 Points

You have const hexRegEx = /^(#)[d\a-f]{6}$/i and not const hexRegEx = /^(#)[\da-f]{6}$/i. The \ needs to be before the d to specify that it can be any digit. If you don't want to use \d, you could use 0-9. You also don't need to have parentheses around the #.