Mark hoisted react constant elements as #__PURE__ (#7372)

2018-02-21 18:58:56 +01:00
parent d75a6b8468
commit d283324f8a
42 changed files with 180 additions and 57 deletions
--- a/packages/babel-plugin-transform-react-constant-elements/src/index.js
+++ b/packages/babel-plugin-transform-react-constant-elements/src/index.js
@@ -1,4 +1,5 @@
 import { types as t } from "@babel/core";
+import annotateAsPure from "@babel/helper-annotate-as-pure";

 export default function transformReactConstantElement(api, options) {
  const { allowMutablePropsOnTags } = options;
@@ -101,7 +102,11 @@ export default function transformReactConstantElement(api, options) {
        path.traverse(immutabilityVisitor, state);

        if (state.isImmutable) {
-          path.hoist();
+          const hoisted = path.hoist();
+
+          if (hoisted) {
+            annotateAsPure(hoisted);
+          }
        }
      },
    },