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Most people do not understand the knowledge points of this article "what are JavaScript mistakes?", so the editor summarizes the following content, detailed content, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "what are JavaScript mistakes" article.

The try statement tests for errors in the code block.

The catch statement handles errors.

The throw statement creates a custom error.

The finally statement executes after the try and catch statements, regardless of whether an exception is triggered or not.

JavaScript error

Various errors occur when the JavaScript engine executes JavaScript code.

It can be a syntax error, usually a coding error or typos caused by a programmer.

It may be a spelling mistake or a missing feature in the language (may be due to browser differences).

It may be an error caused by an incorrect output from the server or the user.

Of course, it may also be due to many other unpredictable factors.

JavaScript throws (throw) error

When an error occurs, when something goes wrong, the JavaScript engine usually stops and generates an error message.

The technical term to describe this situation is: JavaScript will throw an error.

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