console.dir()

The method console.dir() displays an interactive list of the properties of the specified JavaScript object. The output is presented as a hierarchical listing with disclosure triangles that let you see the contents of child objects.

In other words, console.dir() is the way to see all the properties of a specified JavaScript object in console by which the developer can easily get the properties of the object.

object

A JavaScript object whose properties should be output.

• MSDN: Using the F12 Tools Console to View Errors and Status
• Chrome Console API reference