javascript - JS how to check empty String and Space

Help me
pls

if(value == ""){
//
            do
            anything
}

but
I need to check space " " (2,3,... space is include) is the same way of empty
String

ps. sorry in my
English

Answer

A regex can easily solve this problem.

if (/^ *$/.test(value))
            {
 //string contains 0+ spaces
            only
}