JS data type of study notes

type of data

The original value -> stack

Number String Boolean undefined (variable declarations unassigned) null (placeholder)

Reference value -> heap

Array Object function ...date RegExp

 

arr = [1, 3];

arr1 = [1, 2];

Wherein [1, 3] and [1,2] are two different variables

 

 Note: images from a free crossing JS curriculum Screenshot