ES6: default parameters - Blog

We could pass some parameters in functions. Okay. With ES6, it is possible to assign default values for them if they are not passed.

When we create a function, we could verify that the values were passed or not, and maybe assign a value to it.

	function oldHello(name, nickname) {
	var name = (!name) ? 'James Bond' : name;
	var nickname = (!nickname) ? 'Bond' : nickname;

	console.log('My name is ' + nickname + ', ' + name);
	}

	oldHello();
	// My name is Bond, James Bond

Now, we could do something like that:

	function hello(name = 'James Bond', nickname = 'Bond') {
	console.log('My name is ' + nickname + ', ' + name);
	}

	hello();
	// My name is Bond, James Bond

Here you can find a JS Bin with the examples.