B-objects-get-set

Getting the value of an object's property

Let's take one of the objects we looked at earlier..

var laptop = {
    brand: "Lenovo",
    screenSize: 13,
    isTouchscreen: true
};

Try to console.log(laptop). The output might depend on your environment!

To find out the value of an object's property, you can use the dot notation..

console.log(laptop.brand);

You can also use the bracket notation (although this is rarely used, it's good to know):

console.log(laptop['brand']);

Setting the value of a property

Similar to reading, if we want to set a property:

laptop.brand = "Apple";

It's strongly recommended you always use the same type when re-assigning an object's property (if it was a string before, keep it a string - and so on).

var laptop = {
    brand: "Lenovo",
    screenSize: 13,
    isTouchscreen: true
};

// DON'T DO THIS
laptop.screenSize = "15 inch";

// OK TO DO
laptop.screenSize = 15;