jQuery .html() clone
A (Hopefully) perfect clone of the jQuery .html() method
If it has an argument, it will set the innerhtml of the element to the value of the argument.
If it has no argument, it returns the innerHTML of the element.
It is also chainable! yay!
@Evghenusi
Using a placeholder variable to return undefined? Smart!
but in your code, if you do .html(0) it will return this.innerHTML