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Improve asyncIterator error (#7745)

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* Improve asyncIterator error

When an object is has neither asyncIterator or iterator defined, throw the "not an async iterable" error

* Correct logic

* reduce access

* Update helpers.js
This commit is contained in:
Jason Quense 2018-04-17 22:02:53 -04:00 committed by Brian Ng
parent 21c7ff3f37
commit 2bded404f3
1 changed files with 4 additions and 2 deletions
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6
packages/babel-helpers/src/helpers.js
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@ -72,13 +72,15 @@ helpers.jsx = () => template.program.ast`
helpers.asyncIterator = () => template.program.ast` helpers.asyncIterator = () => template.program.ast`
export default function _asyncIterator(iterable) { export default function _asyncIterator(iterable) {
var method
if (typeof Symbol === "function") { if (typeof Symbol === "function") {
if (Symbol.asyncIterator) { if (Symbol.asyncIterator) {
var method = iterable[Symbol.asyncIterator]; method = iterable[Symbol.asyncIterator]
if (method != null) return method.call(iterable); if (method != null) return method.call(iterable);
} }
if (Symbol.iterator) { if (Symbol.iterator) {
return iterable[Symbol.iterator](); method = iterable[Symbol.iterator]
if (method != null) return method.call(iterable);
} }
} }
throw new TypeError("Object is not async iterable"); throw new TypeError("Object is not async iterable");