How to check item string in list?

Question

I don't know how get item from list with an keyvalue JavaScript. Help me guys!

Answer 1

Of curse Mohamed ELomari

Answer 2

var list = new List(["item One", "item two"]) ;
For example, how i can get list in position using an var with value "item two"? Exist an keymap in JavaScript?

Answer 3

I myself create before using a variable that comes as text to know if it contains in the list. Is there a function that I can know from the string if it exists in this list?

Answer 4

Yeah.