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Fix https://github.com/github/fetch/issues/657 #794

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merged 3 commits into from Jul 9, 2020
Merged

Fix https://github.com/github/fetch/issues/657 #794

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0766e78
remove strict mode from bundle
JakeChampion Jul 8, 2020
317bea3
use `this` if `self` is not defined
JakeChampion Jul 8, 2020
c80ec76
create variable called `global` which is either `self` or `this`
JakeChampion Jul 9, 2020
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30 changes: 17 additions & 13 deletions fetch.js
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@@ -1,9 +1,13 @@
var global = (function(self) {
return self
// eslint-disable-next-line no-invalid-this
})(typeof self !== 'undefined' ? self : this)
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Can you please add some fallback such as an empty object?
I know this whatwg-fetch is intended to be used only in browser, however, it gives many conveniences by just "importing it" and not using it.

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To illustrate more, I'm suggesting to make importing 'whatwg-fetch' in nodejs environment works, while blocking the usage.

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This works in NodeJS correctly because the global this works in NodeJS.

Here the output of running it in NodeJS

❯ node -v
v14.4.0
❯ node
Welcome to Node.js v14.4.0.
Type ".help" for more information.
> var global = (function(self) {
...   return self
...   // eslint-disable-next-line no-invalid-this
... })(typeof self !== 'undefined' ? self : this)
undefined
> global
<ref *1> Object [global] {
  global: [Circular *1],
  clearInterval: [Function: clearInterval],
  clearTimeout: [Function: clearTimeout],
  setInterval: [Function: setInterval],
  setTimeout: [Function: setTimeout] {
    [Symbol(nodejs.util.promisify.custom)]: [Function (anonymous)]
  },
  queueMicrotask: [Function: queueMicrotask],
  clearImmediate: [Function: clearImmediate],
  setImmediate: [Function: setImmediate] {
    [Symbol(nodejs.util.promisify.custom)]: [Function (anonymous)]
  }
}
> 
(To exit, press ^C again or ^D or type .exit)
>

var support = {
searchParams: 'URLSearchParams' in self,
iterable: 'Symbol' in self && 'iterator' in Symbol,
searchParams: 'URLSearchParams' in global,
iterable: 'Symbol' in global && 'iterator' in Symbol,
blob:
'FileReader' in self &&
'Blob' in self &&
'FileReader' in global &&
'Blob' in global &&
(function() {
try {
new Blob()
Expand All @@ -12,8 +16,8 @@ var support = {
return false
}
})(),
formData: 'FormData' in self,
arrayBuffer: 'ArrayBuffer' in self
formData: 'FormData' in global,
arrayBuffer: 'ArrayBuffer' in global
}

function isDataView(obj) {
Expand Down Expand Up @@ -435,7 +439,7 @@ Response.redirect = function(url, status) {
return new Response(null, {status: status, headers: {location: url}})
}

export var DOMException = self.DOMException
export var DOMException = global.DOMException
try {
new DOMException()
} catch (err) {
Expand Down Expand Up @@ -496,7 +500,7 @@ export function fetch(input, init) {

function fixUrl(url) {
try {
return url === '' && self.location.href ? self.location.href : url
return url === '' && global.location.href ? global.location.href : url
} catch (e) {
return url
}
Expand Down Expand Up @@ -543,9 +547,9 @@ export function fetch(input, init) {

fetch.polyfill = true

if (!self.fetch) {
self.fetch = fetch
self.Headers = Headers
self.Request = Request
self.Response = Response
if (!global.fetch) {
global.fetch = fetch
global.Headers = Headers
global.Request = Request
global.Response = Response
}
3 changes: 2 additions & 1 deletion rollup.config.js
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Expand Up @@ -3,6 +3,7 @@ export default {
output: {
file: 'dist/fetch.umd.js',
format: 'umd',
name: 'WHATWGFetch'
name: 'WHATWGFetch',
strict: false
}
}