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Series
This series explains core concepts of javascript.
Synchronous Javascript (Javascript Engine) Javascript is a synchronous language at its core, that means it runs on a single thread with a single call stack. So, all the code you write in core JS is executed line by line, one after the other on the sa...
Javascript executes in two phases: Creation Phase: In this phase, JS allocates space in memory for all the variables, constants, functions, etc. This phase actually creates the execution contexts. Execution phase: In this phase, all the assignments...
Ever wondered how functions remember their outer scope to execute? How scopes work in Javascript? In this article, we will look at the core concepts like execution context, lexical environment, scope chaining and closures. These concepts define how J...
Javascript allows to declare functions in various ways. This article provides a quick overview of each type. Simple function definition function hello() { console.log("hello") } hello(); // Output: hello Anonymous function expression con...
A function mainly has two requirements to run - it’s lexical environment which holds all the parameters and variables present in the function and the object on which the function gets executed, which is what is referenced by this keyword. Both lexica...
In this article, we will look at some Object Oriented Programming concepts like classes, objects, etc. Javascript doesn’t inherently support classes rather it uses a concept known as prototype. Let’s understand the prototypal behaviour of JS in depth...