Lazily initialize and cache constant JSX elements (#12967)

Co-authored-by: Justin Ridgewell <justin@ridgewell.name>
2021-03-06 17:33:43 +01:00
parent d04842a700
commit 8dacf85859
72 changed files with 695 additions and 209 deletions
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/var/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/var/output.js
@@ -1,6 +1,6 @@
 function fn(Component) {
-  var data = "prop",
-      _ref = <Component prop={data} />;
+  var _Component;

-  return () => _ref;
+  var data = "prop";
+  return () => _Component || (_Component = <Component prop={data} />);
 }