An error arises when a program's execution has unexpected results. There are 3 usual errors in Angular:
1. External
2. Internal
3. Application

**Error handling** in Angular is done with the help of the `handleError` function. This function allows centralized exception handling and is provided to the application when the application is initialized.



 
# Class
The `handleError` function is a part of the `errorHandler` class.

# Parameter
The `handleError` function takes the exception raised as a parameter.

# Output

The `handleError` function, by default, only prints error messages to the console. However, a customized exception handler can be added to intercept and modify the default behavior.

# Code
The following code explains the syntax for `errorHandler` class. This is the default implementation that can be changed.



class MyErrorHandler implements ErrorHandler {

  //this function is called when the application throws an error
  handleError(error: Error) { 
    // handle the exception here
    
  }

}

@NgModule({
  providers: [{provide: ErrorHandler, useClass: MyErrorHandler}]
})
class MyModule {}

What is error handling in Angular?

Error handling in Angular uses handleError in the errorHandler class for centralized exception management.