"React allows developers to create large web-applications that use data and can change over time without reloading the page. It aims primarily to provide speed, simplicity, and scalability"
You can do the 'almost' same thing with with Zam, but without the slow Virtual DOM. I say 'almost', because you really need to be good at vanillajs if you expect to create a massive and scalable web application that's written in Zam.
Well, in the programming world you can do 'almost' anything with anything, basically. So -- if you really good at it -- anything is an alternative to anything else.