Testing and Debugging in JavaScript

Testing and debugging are essential for building reliable JavaScript applications.

Debugging with Console

The console object helps track what's happening in your code.

Examples:

console.log("Debug message");
console.error("Error message");
console.warn("Warning message");

Using Breakpoints

Modern browsers let you pause execution and inspect variables using developer tools.

Writing Tests

Automated tests ensure your code works as expected and prevent future bugs.

Simple test example using assertions:

function add(a, b) {
  return a + b;
}

console.assert(add(2, 3) === 5, "Add function failed");