JavaScript SyntaxError: Unexpected end of input

A plain-words explanation of this JavaScript message: what it means, the usual causes, and the steps that fix it.

The messageUncaught SyntaxError: Unexpected end of input

Make the error yourself

Run in Google Chrome 157.0.8103.51. This is the smallest example we could find that shows it.

JavaScript (in a script tag)

function greet(name) {
  console.log("Hello " + name);

greet("Asha");

Browser console (the real message)

SyntaxError: Unexpected end of input

Why it happens

The engine reached the end of the file while it was still waiting for something to be closed, most often a } or a ). In the example the function body is never closed, so the call greet("Asha") becomes part of the function. The browser cannot point at the real mistake, because the code is valid until the end; it reports the end of the file.

How to fix it

1. Count the opening and closing brackets { }, ( ) and [ ]. An editor that highlights the matching bracket helps most.
2. Format the code automatically (Prettier or "Format document"). The indentation will look wrong where the bracket is missing.
3. Check also for an unclosed string or a template literal (a backtick) before the end.
4. Remove half of the code to find the block that causes it.

The corrected version

JavaScript (in a script tag)

function greet(name) {
  console.log("Hello " + name);
}

greet("Asha");

Browser console (the corrected version)

Hello Asha

How to avoid it

Type the closing bracket as soon as you type the opening one, or use an editor that does it for you.

Questions

This is an independent guide. It is not connected with Python, Microsoft, Google, GitHub or the Git project. Product names belong to their owners. Examples were run on 13 November 2026 in a practice folder or a blank workbook; your version may word a message slightly differently.