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Fix createSuper in Babel <7.5.5 (#11341)

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* Fix createSuper in Babel <7.5.5

In Babel <7.5.5, addHelper only throws when called for the first time.
This was fixed by babel/babel#10208, but since we are already adding
a workaround for <7.9.0, we may as well fix <7.5.5

* Use 7.0.0 in "babel-old-version" test
This commit is contained in:
Nicolò Ribaudo
2020-04-02 17:52:50 +02:00
committed by GitHub
parent c3042cfd27
commit 2c31587aa1
2 changed files with 9 additions and 12 deletions
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12
packages/babel-plugin-transform-classes/src/inline-createSuper-helpers.js
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@@ -3,18 +3,18 @@ import { template, types as t } from "@babel/core";
const helperIDs = new WeakMap();
export default function addCreateSuperHelper(file) {
try {
return file.addHelper("createSuper");
} catch {
// Babel <7.9.0 doesn't support the helper.
}
if (helperIDs.has(file)) {
// TODO: Only use t.cloneNode in Babel 8
// t.cloneNode isn't supported in every version
return (t.cloneNode || t.clone)(helperIDs.get(file));
}
try {
return file.addHelper("createSuper");
} catch {
// Babel <7.9.0 doesn't support the helper.
}
const id = file.scope.generateUidIdentifier("createSuper");
helperIDs.set(file, id);