Add comment to explain enumerability logic.

2016-08-04 21:06:59 -07:00 · 2016-08-04 21:06:59 -07:00 · 11badb556f
commit 11badb556f
parent af50e3194e
1 changed files with 2 additions and 0 deletions
--- a/packages/babel-preset-es2015/src/index.js
+++ b/packages/babel-preset-es2015/src/index.js
@ -16,6 +16,8 @@ module.exports = preset({});
 Object.defineProperty(module.exports, "buildPreset", {
  configurable: true,
  writable: true,
+  // We make this non-enumerable so old versions of babel-core won't see it as an unknown property,
+  // while allowing new versions to see it as a preset builder function.
  enumerable: false,
  value: preset,
 });