What are JavaScript Data Types? Number, String, Boolean, Object, Undefined 2. What is ‘this’ keyword in JavaScript? ‘This’ keyword refers to the object from where it was called. 3. What is === operator? === is called a strict equality operator, which returns true when the two operands have the same…

Here are our top 10 reasons why you should choose React. 1. React is declarative React uses declarative instead of imperative syntax. It’s a simpler way of developing apps, and you can learn why here. Basically, React is faster to develop with because you don’t need to tell the app how to represent the…

Primitive Values​ is six types. numbers, Boolean, String, Biglnt, symbol 2. object and function is not null . object and function are values. object and function result show browser inspect colsole.log(). then show object and function values. 3. javascript cheacking string and numbers and object , console.log(takeOf(4)); // number console.log(takeOf(“rakibul”))…

JavaScript is a best programming language in the world. JavaScript born in 1995. JavaScript is fist relescd in 1997. JavaScript fist name is “LiveScript”. JavaScript is powerfull language . Learn JavaScript String:- The string object's chartAt() method returns a new string consisting UTF-16 code. concat() method concatenates the string arguments to the calling string . IndexOf() method returns the index within the calling String object of the first occurrence of the specified value.