How come Javascript arrays can hold multiple data-types at same time? [closed]

Question

I've just picked up javaScript and i am amazed to see that javaScript arrays can hold any type of data in them, for example, a number and a string both can be stored in a single array. well, i've always studied in my Data Structures classes that "Array is a container which can hold fix number of items and these items should be of same type". My question is :- Is javascript a special case? or, they have changed the definition of array?

Answer 1

Quoting Mozilla JS Reference on this:

Arrays are list-like objects whose prototype has methods to perform traversal and mutation operations. Neither the length of a JavaScript array nor the types of its elements are fixed.

More on this can be found here