ES7 decorators are back in Babel 6.x

Dec 8, 2015  

In November 2015, I was writing that decorators had been ripped out of Babel 6.

Now, they are back. Install babel-plugin-transform-decorators-legacy and update .babelrc to include the legacy decorators transform:

  "presets": ["stage-0", "es2015", "react"],
  "plugins": ["transform-react-display-name", "transform-decorators-legacy"]

I can now use an @foo decorator to wrap a class and add a bar() method to it:

// The @foo decorator is just a function
function foo (x) {
  return class Bar extends x {
    name () {
      return 'bar';

// Apply the decorator to class Foo...
class Foo {
  name () {
    return 'foo';

const foo = new Foo ();

// Foo is in fact Bar
expect ( ()).to.equal ('bar');