Wrong number of arguments TypeScript TS2554

Why This Happens

In TypeScript, a function was called with the wrong number of arguments. This is one of the most common TypeScript errors developers encounter. Understanding the root cause helps you fix it quickly and prevent it from recurring.

The Problem

function greet(name: string, age: number) {}
greet('Alice');

The Fix

function greet(name: string, age?: number) {}
greet('Alice');

Step-by-Step Fix

1. 1

   Identify the error

   Look at the error message: TS2554: Expected N arguments, but got M. This tells you exactly what went wrong.

2. 2

   Find the cause

   Check the stack trace to find which line of your TypeScript code triggered this error.

3. 3

   Apply the fix

   Use the corrected code pattern shown above. Test to confirm the error is resolved.