Calls a function when a file is dragged off the element.
Calling myElement.dragLeave(false) disables the function.
Examples
Syntax
  
      dragLeave(fxn)
      
        Parameters
 fxn 
Function|Boolean: function to call when the file is dragged off the element. 
false disables the function.Notice any errors or typos? Please let us know. Please feel free to edit src/dom/p5.Element.js and open a pull request!