About Closure ? In Javascript, one of the most important and theoretical topic is Closure. It is one of the most misunderstood topic. What is closure ? Closure is nothing but combination of function bundled together with the references to its sur...
What is a Block? A Block is a compound statement which is used to group one or more statement. It groups the multiple lines and interprets as single line. Basically we can create Block with curly braces ( "{ }" ). We use block where we need to write...
Are let & const variable Hoisted ? The let & const keyword were introduced in ES6(2015). We all know that variable declared with var keyword can be hoisted. But are let & const variable also hoisted, the answer is yes. But they work little different ...
What is SCOPE ? Scope - It determines the accessibility of variable, object, function from different part of the code. For the above code variable b is within the scope of the function a( ). So basically there are two type of scopes 1 : Global sc...
What is Hoisting ? Javascript Hoisting is a process where the interpreter appears to move the declaration of function, variable or classes to the top of there scope prior to the execution of code. Basically it means that you can use the functions or ...
So basically, Call stack is a mechanism used in javascript to keep the track of multiple function call. Call Stack uses STACK which means Last In First Out which means the element last inserted into the stack will be removed or pop out first. For ex...
Javascript is one of the most light weighted and synchronous, single threaded programming language. Whenever you execute a javascript program a global execution context is created which has two parts. For Example lets consider this code For the abov...