Blog

JavaScript Heap, Call Stack, Callback Queue #10daysUnknownJSChallenge #day10

On 26-Feb-2020

Before understanding Heap, Call Stack and Callback Queue, we need to refresh knowledge on a very basic JavaScript concept. JavaScript is a single-threaded language which means, it has a single Call Stack and Heap for the code execution

JavaScript Proxy - A Basic Introduction #10daysUnknownJSChallenge #day9

On 25-Feb-2020

The Proxy object is used to wrap another object (target) and defines handler object to control the basic operations like reading and writing on the target object by implementing the proxy object's internal methods

Warning about Semicolon in JavaScript #10daysUnknownJSChallenge #day8

On 24-Feb-2020

Many JavaScript developers often suggest using semicolon for better readability. However, readability is not the only purpose to use semicolon in JavaScript. Though JavaScript supports Automatic Semicolon Insertion, it is not supported in every scenario and causes unexpected error sometimes.

JavaScript Optional Chaining Proposal #10daysUnknownJSChallenge #day7

On 23-Feb-2020

JavaScript optional chaining proposal came to solve the major problem that every JavaScript developer facing during object property access. Most useful while accessing nested object property

What is TC39? #10daysUnknownJSChallenge #day6

On 22-Feb-2020

TC39 is a Technical Committee number 39 which is part of ECMA. The Ecma TC39 committee is responsible for evolving the ECMAScript programming language and authoring the specification

Nullish Coalescing proposal in JavaScript #10daysUnknownJSChallenge #day5

On 21-Feb-2020

The current way of accessing the property with some default value as a fallback is done like below. When using the above syntax for the default value, it works fine when left-hand side expression is evaluated to null or undefined

Function with new keyword #10daysUnknownJSChallenge #day4

On 20-Feb-2020

Did you used a new keyword anywhere in the function?. Did you heard anytime before?. Yes, it exists. Let's explore a little bit on it

JavaScript Map and Set #10daysUnknownJSChallenge #day3

On 19-Feb-2020

Typically, we use Object and Array (a type of object) for almost everything in JavaScript. Map and Set are two alternatives to this which are more developer-friendly and has support for many inbuild methods and properties

JS Getters and Setters - #10daysUnknownJSChallenge #day2

On 18-Feb-2020

getters and setters are accessor properties for a object. getters and setters values are essentially functions which return the value when accessing the property

JavaScript Symbols - #10daysUnknownJSChallenge #day1

On 17-Feb-2020

Symbol used to represent a unique identifier. But the magic is, it not gonna reveal the unique identifier value. But we can hold the reference of it by assigning the Symbol into some variable and use whenever needed.

Importance of the HTML form element

On 15-Nov-2019

The HTML <form> element is one of most important element which we are missing mostly in the modern web development framework such as React, Angular, Vue, etc., due to the onClick event handler works fine

React Error Boundaries

On 23-Oct-2019

While developing a React application we may often ended up with 'x' is not a property of undefined and 'y' is not a function error and page gets crashed. We can easily identify this kind of issues in the development and fix it. But what happens if this appears in our production application unexpectedly