--- title: "Aman kumar (@Kr794) | Hashnode" description: "Software Developer @Accenture | Neog undergrad. Read the latest articles by Aman kumar on Hashnode." url: "https://hashnode.com/@Kr794" --- @Kr794 # Aman kumar @Kr794 · Joined February 2023 Software Developer @Accenture | Neog undergrad [Website](https://aman-kumar-pfolio.netlify.app/) ### [Nullish coalescing (??) & Optional chaining (?.) in JS](https://amankumr.hashnode.dev/nullish-coalescing-optional-chaining-in-js?utm_source=hashnode&utm_medium=feed) Introduction While writing JavaScript code we come across multiple errors like TypeError: Cannot read property TypeError: ‘undefined’ is not an object TypeError: null is not an object and these errors were caused when we try to reference a varia... 3 min read · [amankumr.hashnode.dev](https://amankumr.hashnode.dev/nullish-coalescing-optional-chaining-in-js?utm_source=hashnode&utm_medium=feed) [Feb 23, 2023](https://hashnode.com/posts/nullish-coalescing-optional-chaining-in-js/63f7b9453f6fe0388fd524e9) ### [Reference error VS Type error in JS](https://amankumr.hashnode.dev/reference-error-vs-type-error-in-js?utm_source=hashnode&utm_medium=feed) Introduction You must have come across multiple errors while writing JS code. In this blog, we will understand the difference between Reference Error and Type Error and how we can avoid these errors in our code. Hope this blog helps you understand th... 2 min read · [amankumr.hashnode.dev](https://amankumr.hashnode.dev/reference-error-vs-type-error-in-js?utm_source=hashnode&utm_medium=feed) [Feb 16, 2023](https://hashnode.com/posts/reference-error-vs-type-error-in-js/63ee63052aa26c3a414fbf91) ### [Why does Console return “undefined” on executing the log method ?](https://amankumr.hashnode.dev/why-does-console-return-undefined-on-executing-the-log-method?utm_source=hashnode&utm_medium=feed) You've probably noticed some strange behavior if you've ever used console.log() in the browser. that you get "undefined" after printing the expected value to the console. Have you ever wondered why the console displays "undefined" as a result? Allow... 1 min read · [amankumr.hashnode.dev](https://amankumr.hashnode.dev/why-does-console-return-undefined-on-executing-the-log-method?utm_source=hashnode&utm_medium=feed) [Feb 16, 2023](https://hashnode.com/posts/why-does-console-return-undefined-on-executing-the-log-method/63ee5e06f519501c6bc788de)