https://javascript.info › custom-errors
Custom errors, extending Error - The Modern JavaScript TutorialCustom errors, extending Error. When we develop something, we often need our own error classes to reflect specific things that may go wrong in our tasks. For errors in network operations we may need HttpError, for database operations DbError, for searching operations NotFoundError and so on.
Nel codice qui sopra possiamo notare due tipi di errore, ma ce ne possono essere molti di più. Se la funzione readUser genera diversi tipi di errore, allora dovremmo chiederci: vogliamo veramente controllare tutti i tipi di errore un alla volta ogni volta?. Spesso la risposta è “No”: vorremo stare tutto sommato “un livello sopra tutto questo”.
Sekarang kesalahan khusus jauh lebih pendek, terutama ValidationError, karena kita menyingkirkan baris "this.name = ..." di konstruktor. Pengecualian pembungkusan. Tujuan dari fungsi readUser pada kode di atas adalah “untuk membaca data pengguna”. Mungkin ada berbagai jenis kesalahan dalam prosesnya.
Nos erreurs devraient prendre en charge des propriétés d’erreur de base telles que message, name et, de préférence, stack. Mais elles peuvent aussi avoir d’autres propriétés propres, par exemple les objets HttpError peuvent avoir une propriété statusCode avec une valeur telle que 404 ou 403 ou 500.
The JavaScript language Error handling Error handling, "try...catch" Custom errors, extending Error Previous lessonNext lesson Share Tutorial map
https://stackoverflow.com › questions › 783818
How do I create a custom Error in JavaScript? - Stack OverflowYou have to switch on Error-type-hierarchy or object-value in JavaScript because you can only specify a single catch block. In your solution, (x instanceof NotImplementedError) is false, which isn't acceptable in my case.
https://fr.javascript.info › custom-errors
Les erreurs personnalisées, extension de Error - JavaScriptNos erreurs devraient prendre en charge des propriétés d’erreur de base telles que message, name et, de préférence, stack. Mais elles peuvent aussi avoir d’autres propriétés propres, par exemple les objets HttpError peuvent avoir une propriété statusCode avec une valeur telle que 404 ou 403 ou 500.
https://www.geeksforgeeks.org › how-to-create-custom-errors-in-javascript
How to create custom errors in JavaScript - GeeksforGeeksYou can use this error class to construct your own error object prototype which is called as custom error. Custom errors can be constructed in two ways, which are: Class constructor extending error class. Function constructor inheriting error class.
https://adamcoster.com › blog › javascript-custom-errors
Custom JavaScript/Typescript Errors: Why and how to use them - Adam CosterCustom JavaScript classes are super useful for simplifying your error-handling logic. Learn how they work, why to use them, and get templates and VSCode snippets to make them easy to add to your project.
https://dev.to › ... › a-practical-example-of-how-to-use-custom-errors-in-javascript-1175
A practical example of how to use custom Errors in JavaScriptBut let’s give a quick introduction to custom errors. A good practice when writing code, and this is just not related to JavaScript, but to any language, is to try to catch errors in your code, that could be guarding variables, or checking if an API request failed for some reasons.
https://javascript.info › error-handling
Error handling - The Modern JavaScript TutorialThe JavaScript language Error handling Error handling, "try...catch" Custom errors, extending Error Previous lessonNext lesson Share Tutorial map
https://www.geodev.me › blog › customizing-errors-in-javascript
Customizing Errors in JavaScript - DEV CommunityThe Error class in JavaScript provides a powerful mechanism for customizing and extending error handling capabilities. By creating custom error types, developers can craft error messages tailored to their applications and domain-specific scenarios.
https://devcamp.com › ... › guides › how-to-create-a-custom-error-class-javascript
How to Create a Custom Error Class in JavaScript - DevCampHow to Create a Custom Error Class in JavaScript. In the last guide, we walked through a basic introduction to the syntax for error management in JavaScript, and in this guide I want to extend that knowledge. Guide Tasks.
https://blog.r0b.io › post › creating-custom-javascript-errors
Creating custom JavaScript errors - r0bCreating custom errors in JavaScript can be very useful. If you want to handle those errors in a catch block you can use the instanceof operator to check for that specific error. And with TypeScript, you can then safely use the fields and methods on your custom error.
