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The path to the resource is the first parameter and is required all the time, whereas the init parameter is optional. Angular has its own HTTP module that works with Angular apps. It also has other optional parameters as in the example below: As you can see, fetch has many advantages for making HTTP requests. reason described in the tip above. Given different fields, you can always adjust the code as needed. You can easily generate a service using Angular CLI. URL, so even if you change the POST parameters, the browser won't actually requery Simple POST request with a JSON body using fetch This sends an HTTP POST request to the Reqres api which is a fake online REST api used for testing, it includes a generic /api/<resource> route that supports POST requests to any <resource> and responds with the contents of the post body and a dynamic id property. Finally we are displaying the data we have posted in our HTML elements