Javascript Absolute Beginner's Guide, 3rd Edition

18

Getters and Setters

In this Chapter

• Learn the difference between data properties and accessor properties

• Learn about getters and setters

• Identify when to use an accessor property versus a data property

The properties we have been working with so far are known as data properties. We give these properties a name and assign a value to them:

let foo = {
  a: "Hello",
  b: "Monday";
}

To read back the value, all we do is just access it directly:

console.log(foo.a);

Writing a value to this property is sorta what we would expect as well:

foo.a = "Manic";

Outside of setting and reading a value, there really isn’t much more we can do. That is the sad tale of a data property. Now, as part of reading and writing properties, what if we had the ability ...