CodePen Embed - Fix JavaScript TypeError: X is not a function (2025 Guide)

<div>
  <h3>TypeError Demo</h3>
  <p>Open the console (F12) to see the error in action.</p>
  <p>Learn how to fix this error! Visit my blog: <a href="https://www.devsky.net/2025/03/typeerror-x-is-not-function-in.html" target="_blank" style="color: #1976d2; text-decoration: none;">Fix TypeError Guide</a></p>
</div>

body {
  font-family: Arial, sans-serif;
  padding: 20px;
  background-color: #f5f5f5;
}
h3 {
  color: #d81b60;
}
p {
  color: #424242;
}

// This will trigger "TypeError: myVar is not a function"
const myVar = "Hello";
myVar(); // Attempting to call a string as a function

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