[SOLVED] Define an undefined variable

[Albertos]

@yaustar

@Albertos

Okay and how to set it back to the same state before you define it that way?

Not sure what you mean by this?

Like it’s not defined again

@yaustar

@Albertos

What are the possibilities with a variable that is not global?

It could be a variable on a JS object. eg

var someObj = {};
if (!someObject.variable) {
  someObject.variable = someValue;
}

Or a local variable;

var variable;

if (!variable) {
  variable = someValue;
}

Here you define it first and that is also not what I want. I just want to check in the if statement if the variable exist and if not I want to define it. Also I want to make it not exist again on another place in my script.