What is difference b/w "string" and string in javascript : I was reading you dont know js(Up and going) and i stumbled across this piece of line

The return value from the typeof operator is always one of six (seven as of ES6!) string values. That is, typeof "abc" returns "string", not string.

I am unable to understand diffence b/w "string" and string.
Whenever i check any typeof for a string value,
the value is "string".

Can I get help in understanding this