Add optionality to catch bindings (#5956)

2017-07-25 15:38:48 +01:00
parent 51a293601b
commit 9fc910d8c0
29 changed files with 360 additions and 9 deletions
--- a/packages/babel-plugin-transform-optional-catch-binding/src/index.js
+++ b/packages/babel-plugin-transform-optional-catch-binding/src/index.js
@@ -0,0 +1,17 @@
+import syntaxOptionalCatchBinding from "babel-plugin-syntax-optional-catch-binding";
+
+export default function() {
+  return {
+    inherits: syntaxOptionalCatchBinding,
+
+    visitor: {
+      CatchClause(path) {
+        if (!path.node.param) {
+          const uid = path.scope.generateUidIdentifier("unused");
+          const paramPath = path.get("param");
+          paramPath.replaceWith(uid);
+        }
+      },
+    },
+  };
+}