What is type checking in JavaScript?

What is type checking in JavaScript?

Type checking in JavaScript refers to the process of verifying the type of a variable at runtime. It helps ensure that the values being used in operations are of the expected type.

Why is type checking important?

Type checking is important because it helps prevent runtime errors, improves code quality, and enhances maintainability by ensuring that functions receive the correct types of arguments.

How can I implement type checking in JavaScript?

You can implement type checking in JavaScript using the typeof operator, instanceof operator, or by using TypeScript, which adds static type checking to JavaScript.

Can you give me an example of type checking?

Sure! For example, you can check if a variable is a number like this: if (typeof myVar === 'number') { /* do something */ }.