Catch javasript error microsoft

See Requesting Additional Claims for more detail. You're expected to implement your own retry policies when calling MSAL. For example the network can go down or the server is overloaded. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Handle errors and exceptions in MSAL. Please rate your experience Yes No. Any additional feedback? And you can easily use this anywhere with throw new CustomError "data is not defined".

Let's consider this example:. But when you try it out, even with the try statement, it still does not work.

This is because there are two main types of errors in JavaScript what I described above —syntaxError and so on — are not really types of errors. You can call them examples of errors : parse-time errors and runtime errors or exceptions.

Parse-time errors are errors that occur inside the code, basically because the engine does not understand the code. For example:. You can also nest try blocks, but like every other nesting in JavaScript for example if, for, and so on , it tends to get clumsy and unreadable, so I advise against it. But that is just me. Nesting try blocks gives you the advantage of using just one catch statement for multiple try statements. Although you could also decide to write a catch statement for each try block, like this:.

In this case, there won't be any error from the outer try block because nothing is wrong with it. The error comes from the inner try block, and it is already taking care of itself it has it own catch statement. Consider this below:. This code above works a little bit differently: the error occurs in the inner try block with no catch statement but instead with a finally statement. Get certified by completing a course today!

If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:. Newer versions of JavaScript do not throw EvalError. Use SyntaxError instead. Mozilla and Microsoft defines some non-standard error object properties: fileName Mozilla lineNumber Mozilla columnNumber Mozilla stack Mozilla description Microsoft number Microsoft Do not use these properties in public web sites.

They will not work in all browsers. Report Error. Note that the finally -block executes regardless of whether an exception is thrown. Also, if an exception is thrown, the statements in the finally -block execute even if no catch -block handles the exception. The following example shows one use case for the finally -block. The code opens a file and then executes statements that use the file; the finally -block makes sure the file always closes after it is used even if an exception was thrown.

Now, if we already caught the exception in the inner try -block by adding a catch -block. Any given exception will be caught only once by the nearest enclosing catch -block unless it is rethrown. Of course, any new exceptions raised in the "inner" block because the code in catch -block may do something that throws , will be caught by the "outer" block.

If the finally -block returns a value, this value becomes the return value of the entire try-catch-finally statement, regardless of any return statements in the try and catch -blocks. This includes exceptions thrown inside of the catch -block:.

The outer "oops" is not thrown because of the return in the finally -block.