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Angular and HTTP methods

Angular’s HttpClient service allows developers to perform asynchronous requests using the following methods (all of which return an Observable):

• The request method accepts any type of HTTP method, like, GET, POST, and so on.
• The get method retrieves any information identified by the URI.
• The post method is usually used to create a new resource, like posting data to be added to a remote database.
• The put method is most often used to update existing resources, like posting data to update a current record in a remote database.
• The delete method is generally used to remove an existing resource, such as removing a remote database record.
• The patch method is used to make changes to a resource, not the complete resource itself.
• The head method is identical to the HTTP GET method except the server must not return a message-body in the response.
• The options method requests information about available communication options when communicating with a specific resource.

The more seasoned developers will undoubtedly have noticed that these Angular ...