I have a variable as such:
var foo = ["cool", "cool"];
How do I get the variable name, foo, as a string? In other words, given foo, how do I get "foo"? I want to use it in the following context where "foo" is used in getElementById(...):
document.getElementById("foo").innerHTML = document.getElementById("foo").innerHTML + "";
Thanks!
You're looking at this the wrong way round - to answer this question directly
given foo, how do I get "foo"?
Well, the answer is... type "foo" in your code.
You know you want the string representation of the foo variable name when you write your code, so there's no scenario where the string value you want would be anything other than "foo", right?
It's true that you can reference a property foo, for example of the window object, using window["foo"] but that's the other way round too - you have to know it's foo you want, and deliberately use "foo" to get at it. So there's an example - you know what string to use, "foo", at compile time - it couldn't possibly be anything else.
If it's a global variable, you get it as global object property: window in browsers and global in NodeJS. Otherwise, you don't.
window). You might want to consider using an Object instead; i.e.var o = {foo: ["cool", "cool"]};Now say you havevar x = o.foo;you can iterate overoto findkeyusingo[key] === xfoois never used.