Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript Modify Object Properties

calling function processSale

how is it possible that the javascript engine recognises name: the element will be shown if we set the arguments

processSale(product, 5) - why it didnt call something else in the object instead?

addInventory(product, 3) - same thing here

how it can recognise we want name property to be called.

Thanks for reply

1 Answer

Steven Parker
Steven Parker
231,261 Points

The code uses membership notation to access the name when creating the log message:

  console.log(quantity + " " + prod.name + "s sold");
//                             ^^^^^^^^^

The prod.name accesses the name property of the product. The addInventory function has nearly the same line of code and works the same way.