ES6 transpiler example: how webpack's es-6-loader transforms our ES6 code.

es-6-transpiler-example.js

// ES6 syntax
postsCollection.each((post) => {
 if (post.get('highlighted')) {
 this.highlightedPosts.push(post);
 }
});


// The translated version output by webpack
var this$0 = this;
postsCollection.each(function(post) {
 if (post.get('highlighted')) {
 this$0.highlightedPosts.push(post);
 }
});