How to unset a JavaScript variable?

Question

I have a global variable in JavaScript (actually a window property, but I don\'t think it matters) which was already populated by a previous script but I don\'t

Answer 1

The delete operator removes a property from an object.

delete object.property
delete object['property']

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/delete

According to the question you need one of followings

delete some_var;
delete window.some_var;
delete window['some_var'];