fix spread not returning a new array with a single spread element

2014-11-23 20:16:10 +11:00
parent 1de4893a69
commit 3396cc84f1
4 changed files with 10 additions and 3 deletions
--- a/lib/6to5/transformation/transformers/es6-spread.js
+++ b/lib/6to5/transformation/transformers/es6-spread.js
@@ -48,7 +48,10 @@ exports.ArrayExpression = function (node, parent, file) {
  var nodes = build(elements, file);
  var first = nodes.shift();

-  if (!nodes.length) return first;
+  if (!t.isArrayExpression(first)) {
+    nodes.unshift(first);
+    first = t.arrayExpression([]);
+  }

  return t.callExpression(t.memberExpression(first, t.identifier("concat")), nodes);
 };