-dev build
- local server -HMR(hot module replacement) -parcel watches file watching algorithm in c++ -built in it again when we save the file. -faster builds -caching -image optimization -minification of all file -bundling -compress the file
- code splitting -differential bundling -support older browsers -diagnostic -error handling -host on your applicatio on https also rather than http: -Tree shaking-remove unused code -different dev and prod bundles
/**
- header(-logo component nav item)
- body
- -search (bar ->input)
- restaurant card (container)
- {img,
- name of res,star rating,cuisine,delivery time
- }
- footer->copyright disclamier,address,contact links
*/
normal javascript function-written by facebook developer -useState()-superpowerful state variable in react -useEffect()