Introduction: In a Line, React is a JavaScript library, that's built User Interfaces(UI). Many peoples say, it’s a framework, but it’s false. React JS is an Open-source library. Actually, Frameworks are great things. A framework is a complete & clear path, that’s ready & works with his pattern as that’s building way. But…

You should learn about the best commenting method & coding style, error handling technique, user input with prompt 1. Best Commenting Method in JavaScript : comments used to explain your code. If using comments in coding, sometimes makes your code more readable. & sometimes it makes you bored & angry for reading that code. Two types of…

Variable, String methods, Number methods, math methods — let: let is a block-level variable. let variables do not change or reassign for other blocks. the same variable name, but the different values on the different blocks. if variable declares inside of the block. then it’s doesn’t visible on the outside of the block. …