JavaScript Includes Built-In Errors And Error-Handling
Sometimes js can't "do" what a programmer expects it to do, and JS will throw an error.
When a piece of code is expected to get some data from an API and the networking protocol acts unexpectedly, js will throw an error.
When a piece of code is expected to perform a function that is not available on an object, an Uncaught TypeError may get thrown.
As a developer writing a function that is expecting a number as an argument, we can check for a number and when the parameter is not a number we can throw a new instance of a TypeError reading (fn name) parameter must be a number.
All in all, there is a bit to know about using Errors in JS: