fix(nuxt-img): access prerender.env only in server side

[chadsr]

resolves #660

[brunodeangelis]

Tested and indeed fixes the issue. Thank you @chadsr

[slavanossar]

Could also just do

if (process?.env?.prerender) {
  //...
}

[chadsr]

Could also just do

if (process?.env?.prerender) {
  //...
}

Good point... I've switched it over to that syntax.
For some reason I was thinking optional chaining would still throw on process being undeclared, but it does not.

[slavanossar]

Could also just do

if (process?.env?.prerender) {
  //...
}

Good point... I've switched it over to that syntax. For some reason I was thinking optional chaining would still throw on process being undeclared, but it does not.

Actually sorry, you are right about this. I just ran nuxi generate and when loading the page in the browser an error is thrown ReferenceError: process is not defined, wasn't happening when checking with nuxi dev which threw me off.

[chadsr]

Could also just do

if (process?.env?.prerender) {
  //...
}

Good point... I've switched it over to that syntax. For some reason I was thinking optional chaining would still throw on process being undeclared, but it does not.

Actually sorry, you are right about this. I just ran nuxi generate and when loading the page in the browser an error is thrown ReferenceError: process is not defined, wasn't happening when checking with nuxi dev which threw me off.

Looks like I fell for the same trap and only ran nuxi dev when checking as well.
I've reverted it back to checking with typeof now.

[pi0]

Thanks!