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Intro to Objects
  1. Current: Creating an object
  2. Creating an object: invoking new
  3. Setting object properties
  4. Accessing object properties
  5. Accessing non-existent properties
  6. Accessing properties of undefined
  7. Guarding
  8. Object notation nuances
  9. A common problem: using objects as keys
01/09
Creating an object

An object in JavaScript is a set of key-value pairs, also known as a map. The keys are strings and the values can be anything (other objects or primitives).

There is a lot of different syntax for using objects in JS, so let's get started by trying out some basic examples.

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Start Here

Each lesson starts here. Read the explanation, then follow the instructions underneath. If you get stuck, you can click on the "Hint" for help.

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Type your response to the instructions here, in your code editor.

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Click "Save + Submit" to run your code! Your code’s output will pop up on the screen.

See What it Does

This is the terminal. When you submit your code, it will run your code and display the result here.

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