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Allow for-of on polyfilled or builtin iterables without Symbol support (#11285)

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This commit is contained in:
Nicolò Ribaudo
2020-03-19 11:02:12 +01:00
committed by GitHub
parent 6f932978f8
commit fa7ec81771
4 changed files with 47 additions and 7 deletions
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18
packages/babel-plugin-transform-for-of/test/fixtures/loose-exec/arguments-symbol-unsupported.js vendored Normal file
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@@ -0,0 +1,18 @@
function getArgs() { return arguments; }
let args = getArgs(1, 2, 3);
let res = [];
// Simulate old environment
delete args[Symbol.iterator];
let _Symbol = Symbol;
Symbol = void 0;
try {
for (let i of args) res.push(i);
expect(res).toEqual([1, 2, 3]);
} finally {
Symbol = _Symbol;
}

18
packages/babel-plugin-transform-for-of/test/fixtures/spec-exec/arguments-symbol-unsupported.js vendored Normal file
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@@ -0,0 +1,18 @@
function getArgs() { return arguments; }
let args = getArgs(1, 2, 3);
let res = [];
// Simulate old environment
delete args[Symbol.iterator];
let _Symbol = Symbol;
Symbol = void 0;
try {
for (let i of args) res.push(i);
expect(res).toEqual([1, 2, 3]);
} finally {
Symbol = _Symbol;
}