How to set headers for every request in Angular?

1.	How to set headers for every request in Angular?
Answer» In order to set headers for every request in ANGULAR 7, HTMLHttpRequest is used. There is a number of benefits such as testability features, TYPES request, request and response interception, observable APIs and streamlined error HANDLING that is associated with, XMLHttpRequest. Related INTERVIEW QUESTIONS: AngularJS Interview Questions

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