Implementing a Global Error Handler in Angular: A Step-by-Step Guide

In an Angular application, errors typically fall into two categories:

1. Errors related to HTTP operations
2. Errors resulting from invalid application operations, like attempting to divide by zero

This blog post delves into incorporating a global error handler in an Angular application to manage runtime errors throughout the application effectively.

When working with Angular applications, it’s common to encounter runtime errors, such as calling methods on undefined variables or objects.

A typical scenario is attempting to call array methods like sort() on a variable that hasn’t been properly initialized or has an undefined value.

For example, consider the below code.

export class AppComponent {
  title = 'Global Error Handler Demo';
  data:any;
  getAverage(){
    let a = this.data?.sort().reduce((a:any,b:any)=>a+b)/this.data.length;
    console.log(a);
  }
}

Angular triggers an error when attempting to call the sort() method on an undefined data variable, as depicted in the following image.

Read Full article on below link :

https://www.telerik.com/blogs/implementing-global-error-handler-angular-step-guide