Check if a string is same as a variable name

Question

I have a string:

var x = "news";

and I have a variable

var news = array("1", "2", "3");

I really want to check if is there a variable have the same name with the string "news", in this case, it will return true because there is a variable name news

Can I do this in JavaScript?

Answer 1

You can iterate through the keys of this and check for a var name

 var x = "news" var news = ["1", "2", "3"] function varNameExists(varName){ return [...Object.keys(this)].some(name => name === varName) } console.log(varNameExists(x))

Answer 2

You can check with window.hasOwnProperty but this is not proper way.

 var x="news"; var news=["1","2","3"]; console.log(window.hasOwnProperty(x)) x="nxyz"; console.log(window.hasOwnProperty(x)) x="news"; console.log(window.hasOwnProperty(x))