Do not activate polyfills automatically when using Apollo Server.

when using node10, the method Array.flat does not exist. but, if i require apollo-server-express first, then it suddenly starts to exist.

try this example code:

console.log([].flat);
require('apollo-server-express');
console.log([].flat);

if you run it with node10, you get:

undefined
[Function: flat]

what i would like to happen is:

undefined
undefined

a module should not modify the global namespace.

seems a polyfill gets activated. i started to dig into the dependencies-tree, and it seems it goes:

apollo-server-express
  > apollo-server-core
    > @apollographql/apollo-tools
      > apollo-env
        > core-js

so technically apollo-env is the one that activates the polyfill, but i do not know what that module does or why is it used, so i decided to create the bugreport here.

[jlogsdon]

We just wasted 2 hours tracking down an issue that was exactly this. What’s the status of ripping out the polyfill behavior? It’s honestly unacceptable for a runtime library.

[alexanderniebuhr]

@glasser can we get an v3 alpha release of apollo-server-core on npm with #5244 merged. Or can you tell me how to bundle it locally, so we can use it in our custom cloudflare workers integration, which currently fails because of this.