Fix objectSpread2 backward compatibility (#10170)

babel · Jul 6, 2019 · 24dde2e · 24dde2e
1 parent bff79e1
commit 24dde2e
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/packages/babel-helpers/src/helpers.js b/packages/babel-helpers/src/helpers.js
@@ -406,7 +406,7 @@ helpers.objectSpread = helper("7.0.0-beta.0")`
   }
 `;
 
-helpers.objectSpread2 = helper("7.0.0-beta.0")`
+helpers.objectSpread2 = helper("7.5.0")`
   import defineProperty from "defineProperty";
 
   export default function _objectSpread2(target) {

diff --git a/packages/babel-plugin-proposal-object-rest-spread/src/index.js b/packages/babel-plugin-proposal-object-rest-spread/src/index.js
@@ -452,7 +452,13 @@ export default declare((api, opts) => {
         if (loose) {
           helper = getExtendsHelper(file);
         } else {
-          helper = file.addHelper("objectSpread2");
+          try {
+            helper = file.addHelper("objectSpread2");
+          } catch {
+            // objectSpread2 has been introduced in v7.5.0
+            // We have to maintain backward compatibility.
+            helper = file.addHelper("objectSpread");
+          }
         }
 
         path.replaceWith(t.callExpression(helper, args));