javascript - What do curly braces inside of function parameter lists do in es6?

Question

I keep seeing functions that look like this in a codebase I'm working on:

const func = ({ param1, param2 }) => {
  //do stuff
}

What exactly is this doing? I'm having a hard time finding it on google, because I'm not even sure what this is called, or how to describe it in a google search.

Answer 1

It is destructuring, but contained within the parameters. The equivalent without the destructuring would be:

const func = o => {
    var param1 = o.param1;
    var param2 = o.param2;
    //do stuff
}