window.fetch(input, [init])

Fetches a resource from the network.

Returns: Promise<Response> Promise that resolves to a Response object.
Throws:

• TypeError If init.body is set and init.method is either "GET" or "HEAD".
• TypeError If either network error or network time-out occurs after a http request is made.
• TypeError If there is a failure in reading files in FormData during posting FormData.
  In order to leverage `fetch`, update the `manifest.json` with the `network.domains` permission shown below.Example:

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{
  "permissions": {
      "network": {
          "domains": [
              "https://www.adobe.com",
              "https://*.adobeprerelease.com",
              "wss://*.myplugin.com"
          ]
      }
  }
}
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{
  "permissions": {
      "network": {
          "domains": [
              "https://www.adobe.com",
              "https://*.adobeprerelease.com",
              "wss://*.myplugin.com"
          ]
      }
  }
}

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"domains": [ "https://www.adobe.*", "https://www.*" ]
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"domains": [ "https://www.adobe.*", "https://www.*" ]

See: Headers, Request and Response