Where are fetch() and FormData() defined?

Question

I'm using react-native and standardjs.

Standard reports that both fetch and FormData are undefined when I use them, which is true. However, I can't figure out where either of these symbols are defined. I can't seem to import them from either react or react-native modules.

What import statement should I use to import fetch and FormData?

Answer 1

fetch and FormData are provided as global polyfill for react-native. https://facebook.github.io/react-native/docs/network.html#content

Something like this to your package.json will prevent standardjs complaining about undefined variables

{
  "standard": {
    "globals": [ "fetch", "FormData" ]
  }
}