pre might be null or undefined and throw an error when .slice() is called on it
pre might be null or undefined and throw an error when .slice() is called on it

dkozar/react-draggable,mzabriskie/react-draggable,STRML/react-draggable,hemnstill/react-draggable,mzabriskie/react-draggable,dkozar/react-draggable,hemnstill/react-draggable,emosbaugh/react-draggable,emosbaugh/react-draggable,hemnstill/react-draggable,Gitesoft/react-draggable,emosbaugh/react-draggable,mzabriskie/react-draggable,dkozar/react-draggable,STRML/react-draggable,STRML/react-draggable,hemnstill/react-draggable