Why are Callbacks Detrimental in AngularJS Promise Chains?

Why Use Callbacks in AngularJS Promise Chains is Detrimental

It is often suggested to provide a callback function to AngularJS services, as seen in the code snippet below:

However, this practice is discouraged as an Anti-Pattern. AngularJS services like $http return promises, and attaching callback methods to their .then methods constitutes an undesirable inversion of control.

Refactoring

To rectify this issue, modify the code as follows:

In the service module:

This refactoring eliminates the callback function and maintains the desired control flow through the .then method.

Justification for Refactoring

Callbacks as implemented in the original code:

• Hinder further chaining of success/error handlers.
• Shift control over response handling from the caller module to the called module.
• Introduce the complexity of promises while simultaneously employing them as callbacks. This paradox renders the code confusing.

The above is the detailed content of Why are Callbacks Detrimental in AngularJS Promise Chains?. For more information, please follow other related articles on the PHP Chinese website!