![]() ![]() A click on the first two buttons produces an error - the first a local front end error, the second via a bad response from the back end. In the following we will look at an example application that uses global error handling and go through it step by step. Again, it is better to handle these errors in a centralized location so that the user is presented with consistent error messages and also to avoid forgetting to intercept errors. ![]() Although in this case it is clear that the error is coming from the back end, there is a need to take care of the error handling for every single request to the back end. ![]() Since we as the developers don’t know where and when such an error could occur, it is important to catch all occurring errors at a central location.Īnother error case that can occur is when a request to the back end fails and the front end receives an error message from the back end. ![]() In this case we speak of a local front end error. Since JavaScript is single-threaded in the browser, it can happen that a part of the interface freezes and an action is not performed correctly. No, the web application remains open in the current browser tab, only its behavior is no longer comprehensible to the user in case of an error. Now a web application cannot really “crash” like a desktop application, which in the worst case simply closes. Since nowadays more and more logic is outsourced from the back end to the front end, the probability increases that a faulty behavior of the user leads to an unforeseen error, which can cause the application to “crash”. In this article you will learn how to catch various errors in Angular - one of the world’s most popular front end frameworks - at a global location and process them accordingly. Even if an application has been thoroughly tested before deployment, it is always possible that the user may encounter errors. Learn how to automatically catch all errors in a web application written in Angular and process them accordinglyĪ not always so popular but for the end user enormously important topic is the interception of errors. ![]()
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January 2023
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