integration with react(chrome cast)

hiii,
i just downlaoded the code present in github and it is based on javascript.i executed the code it is working fine.and i just want to develop in reactjs.so i copied the same js files and pasted in reactapp.
and i am getting the error of "cast" and "chrome" undefined.

so in order to resolve this do i need to install or import any package.
please help me out this.
thankyou.