ReactA JavaScript library for building UIs — component trees and declarative rendering for the web. models UIUser interface — the parts of software people see and interact with. as a function of state — components re-render when data changes, ReactA JavaScript library for building UIs — component trees and declarative rendering for the web. diffs a virtual DOM and updates the real one efficiently. Powers FacebookThe social network founded by Mark Zuckerberg — grew into Meta and reshaped online advertising., Instagram, Netflix frontends, Next.js, ReactA JavaScript library for building UIs — component trees and declarative rendering for the web. Native mobile apps, and most modern SPAs. JSX mixes markup with JavaScript (controversial at launch, standard now).

ReactA JavaScript library for building UIs — component trees and declarative rendering for the web. became the dominant frontend library and shifted the industry to component-based declarative UIUser interface — the parts of software people see and interact with..

The virtual DOM and one-way data flow influenced Vue, Svelte, and every major UIUser interface — the parts of software people see and interact with. toolkit that followed.