window.fetch(input, [init])

Returns: Promise<Response> - see Response
Throws:

  1. when init.body is set and init.method is either "GET" or "HEAD".
  2. when either network error or network time-out occurs after a http request is made.
  3. when there is a failure in reading files in FormData during posting FormData.
Param
Type
Default
Description
input
string | Request
either the URL string to connect with or a Request object having the URL and the init option in the below.
[init]
Object
custom options for a HTTP request.
[init.method]
Object
&quot;GET&quot;
the HTTP request method.
[init.headers]
Headers
the HTTP request headers to add.
[init.body]
string | ArrayBuffer | TypedArray | FormData
the body that is included in the HTTP request body. There is a caveat for sending a FormData object. see XMLHttpRequest.send.
[init.credentials]
string
&quot;\&quot;omit\&quot;&quot;
indicates whether to send cookies. Possible values and functions are as follows: "omit" : cookies are NOT sent, "same-origin" and "include" : cookies are sent.