Discuss the role and implementation of interceptors in AngularJS.
Instruction: Explain what interceptors are in AngularJS and how to implement them for request and response manipulation.
Context: This question evaluates the candidate's knowledge of advanced HTTP communication handling within AngularJS applications.
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AngularJS $http interceptors transform the request/response promise chain for $http calls using that injector. They do not automatically intercept native fetch, every third-party request or server-side traffic.
An interceptor can implement request, requestError, response and responseError. Return the appropriate config/response or promise; returning an ordinary value from an error handler can convert a rejection into success. Preserve rejection unless recovery is intentional...