javascript - ES6 Default value parameter for callback

I have several functions with optional callback:

let myFunc = (callback) => {
  callback = callback || (() => {});

  // do something...
  callback();
}

What is the best way to write the callback default parameter?

None of the following solutions satisfy me much:

1 If callback defined:

  if (typeof callback === 'function') {
    callback(); 
  }

Not compact at all!

2 Utility function:

let safeFunc = (callback) => {
  return callback || (() => {});
};

let myFunc = (callback) => {
  // do something...
  safeFunc(callback)();
}

but the problem is that in between this has changed, and it matters in my case.

3 Using call

let myFunc = (callback) => {
  // do something...
  safeFunc(callback).call(this);
}

Not very user friendly.

4 Creating ID function

const ID = () => {};

let myFunc = (callback=ID) => {
  // do something...
  callback();
}

Has external dependency, not very functionnal, though probably the best choice.

Answer

// ES6 way:(default parameters)

function(callback=()=>{}) {
    if(typeof callback === 'function') {
        callback();
    }

}