JavaScript Basics 1:javascript Errors-Throw, Try, and Catch__java

The TRY statement tests the code block for errors.
The catch statement handles the error.
Throw statement to create a custom error.

Errors are certain to occur, and when JavaScript engines execute JavaScript code, various errors occur: It may be a syntax error, usually a programmer-caused coding error or a typo. It may be a spelling error or a missing feature in the language (possibly due to browser differences), possibly due to error output from the server or user. Of course, it may also be due to many other unpredictable factors. When an error occurs, the JavaScript engine usually stops and generates an error message when something goes wrong. The technical term for describing this situation is that JavaScript will throw an error. The Try statement allows us to define blocks of code that are incorrectly tested at execution time. The catch statement allows us to define the block of code that is executed when an error occurs in a try block of code. JavaScript statements try and catch appear in pairs.

The following is an example explanation:

<! DOCTYPE html>