- dev builder
- local server
- file watching algorithm
- caching faster builds
- bundler ,minfy the files, image optimization
- compressing
- consistent hashing al cold splitting
- removes unused codes and error handling
- new folder sare created dist and parcel-cache that contains dev buold or prduction build code
- tree shaking removes unwanted mosules
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normal js function utility functions
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usestate() -> it maintains the state of your component ,scope of a local state varaible is inside that component
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useeffect()
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state varaible inside this usstate we pass the defualt value that variable will recieve usestate is a hook which returns the array the setnewListRestraunt function is used to update the newlistRetraunt state variable it can be updated like a normal js vatriable let [newListRestraunt, setnewListRestyraunt] = useState(restaurantList);
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useROuterError this is a hoook using this hook gives more information about the error
