Why does Parcel bundler create a "global" variable in the browser? Is it safe setting it as undefined? Will it break anything Parcel cares about?

[ajm113]

Hi, so I was trying to use an SDK that is used on the browser-primarily and inside node for server calls. At the moment I'm using their frontend JS and at this time since it's used for both front/back it has to check if it's being used in the browser OR node like so...

const isBrowser = new Function("return typeof window !== 'undefined'") // eslint-disable-line
const isNode = new Function("return typeof global !== 'undefined'") // eslint-disable-line

The problem is when trying to use their SDK Parcel defines a "global" variable which causes the isNode to return true, even though it's in the browser. Why does Parcel define "global" in the browser? I noticed an object called Window, but not sure what it's used for. As a hotfix at this time, I set global = undefined just so the SDK I was given works when it's attempted to be called. Will this break anything with Parcel or cause issues? -- Just making sure I don't shoot myself in the foot later.