Clean Code in JavaScript

Method definitions

Method definitions were added to the language at the same time as class definitions to allow you to easily declare methods bound to a specific object. They are not limited to class definitions, though. You can use them freely in object literals as well:

const things = {  myFunction() {    // ...  }};

In classes, you can also declare methods in this manner:

class Things {  myFunction() {    // ...  }}

You can also use traditional styles of function definition to declare your methods, such as a function expression assigned to an identifier:

class Things {  myFunction = function() {    // ...  };}

There is, however, a crucial difference between method definitions and other styles of function definition. A method definition will always be ...