Daily Code
Select today’s Task
Finish Module
Watch rest videos and take notes clearly on the module .
Duration : 120 min
Practice Task
Practice the topics of current module and more by reading articles and watching videos .
Duration : 150 min
Join Support Session
Join support session for fixing issues .
Duration : 70 min
Visit Facebook Group
Go to facebook group to ask confusing questions or help others to get more confidence .
Duration : 25 min
Extra Practice
Make a similar project or do the same project one more time .
Duration : 90 min
Attend Conceptual Session
Attend Live Conceptual Session For Ultimate Rivision And Get Ready For New Topics .
Duration : 100 min
Start New Module
Watch New Module Videos And Try To Understand As Much As Possible .
Duration : 120 min
Likhon Al Mamun
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Questions and Answers
How does React work ?
React is A JS library . It makes SPA(single page application) UI . It works like a group of JS functions. They are called components . They takes parameters as props . In those components , we write the markup using JSX . React compiles it in JS by babel and makes the UI . React notices changes on site by react's state . React creates a virtual DOM to compare and update UI. When we change any state , react compares the current state with virtual DOM and decides where to change and finally it updates the particullar component of the UI . Thats how it works .
What are the differences between props and states in React ?
props are nothing but parameters of React components . It works almost same like plain JS . But prop are sent as JSX attributes and react converts it in an object . So the functional component gets props as an object .
On the other hand , state is on of the react hooks . It is the main key for creating a single page apllications. when state is changed , react knows that something need be to changed in the UI . Also props are immutable , they can not be chaged after passing. But states are always mutable. In fact , Changing the state is the purpose of using state .
What are the usage of useEffect excluding fetching data from API ?
Tasks that are not supposed to be done by react are done in the useEffect hook like fething data from API . But fething is not the only purpose for using useEffect . Basically react makes the UI . But if we have to do other works like data fething , setting Interval , calling data base or we have to perform any asyncronous task we have to go with this useEffect hook . However it is also used to control a group of task that need to be exicuted only one time or on change of some particular things by the dependency array of useEffect.