Write a function to reverse words in a string

JavaScript
3

Hi @DanCouper , I am also confused about this test as they only provided me below sentence

Using ES5 or ES6, write a function ‘reverseStringWords’ that will reverse every **third** word in a string. The string will only contain a single space between words and there will be no punctuation.

I am not sure either they are asking to reverse every third word in its own position in string such as “xyz abc mno” should become " xyz abc onm" or they are asking to reverse whole sentence.

Many thanks