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JavaScript Regular Expressions in JavaScript Validating a Form Form Validation

Brian Foley
Brian Foley
8,440 Points
Posted by Brian Foley
Brian Foley
8,440 Points

What am I doing wrong?

This seems straight forward enough! But my eyes must not be catching what's wrong :(((

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

1 Answer

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

It looks like you mixed task 1 and 2. For task 1 you want to assign hexRegEx with RegEx itself, not use it to call a method.

Then for task 2, you won't change your task 1 line, but you'll add one where you make use of that hexRegEx to call the method. And you'll need to return the result of that method call.

Brian Foley
Brian Foley
8,440 Points
Brian Foley
Brian Foley
8,440 Points

Now I understand. Thank you!