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Copy "optional" property when cloning Identifier node (#9333)

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Fixes #9331
This commit is contained in:
unconfident 2019-01-18 00:12:16 +02:00 committed by Henry Zhu
parent 0a88230ec4
commit e9588061d7
1 changed files with 4 additions and 0 deletions
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4
packages/babel-types/src/clone/cloneNode.js
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@ -38,6 +38,10 @@ export default function cloneNode<T: Object>(node: T, deep: boolean = true): T {
if (type === "Identifier") {
newNode.name = node.name;
if (has(node, "optional") && typeof node.optional === "boolean") {
newNode.optional = node.optional;
}
if (has(node, "typeAnnotation")) {
newNode.typeAnnotation = deep
? cloneIfNodeOrArray(node.typeAnnotation, true)