What are some common data type errors in JavaScript?

What are some common data type errors in JavaScript?

Common data type errors in JavaScript include type coercion issues, undefined vs null, and using the wrong data type in operations.

Can you explain type coercion with an example?

Sure! In JavaScript, type coercion happens when you try to combine different data types. For example, if you add a number and a string, like 5 + '5', it will result in '55' instead of 10.

What about the difference between undefined and null?

Undefined means a variable has been declared but not assigned a value, while null is an intentional absence of any object value.

How can I avoid these errors in my code?

To avoid these errors, always use strict equality (===) instead of loose equality (==), and validate your data types before performing operations.