Mastering JavaScript Design Patterns - Second Edition

Build me a prototype

As previously mentioned, there was, until recently, no support for creating true classes in JavaScript. While ECMAScript-2015 brings some syntactic sugar to classes, the underlying object system is still as it has been in the past, so it remains instructive to see how we would have created objects without this sugar. Objects created using the structure in the previous section have a fairly major drawback: creating multiple objects is not only time consuming but also memory intensive. Each object is completely distinct from other objects created in the same fashion. This means that the memory used to hold the function definitions is not shared between all instances. What is even more fun is that you can redefine individual ...