[smagch]

I always turn to an ES6 article on babeljs.io when I check out ES6 features.

https://babeljs.io/docs/learn-es2015/

One of the features I like is default parameters. I'd like to add a usage that isn't mentioned in the article. It's really handy to pass optional parameters since default parameters can be nested.

    class Hoge {
      foo({active=true, collapsed=false, silent=false}={}) {
      }
    }
    
    let hoge = new Hoge();
    hoge.foo({collapsed: true});