--- title: "#functions-in-js articles | Hashnode" description: "Explore 68 articles tagged #functions-in-js on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/functions-in-js" --- Tag # #functions-in-js 68 posts · 0 followers [Pratham Kumar](https://hashnode.com/@devprathamkumar) · [May 10](https://hashnode.com/posts/function-declaration-vs-function-expression-what-s-the-difference/6a00af6ce3eebc2e209ebf0b) ### [Function Declaration vs Function Expression: What’s the Difference?](https://withprathamkumar.hashnode.dev/function-declaration-vs-function-expression-what-s-the-difference?utm_source=hashnode&utm_medium=feed) Understand the difference between function declarations and function expressions in JavaScript, how they behave differently, and when to use each in real-world coding. 4 min read · [withprathamkumar.hashnode.dev](https://withprathamkumar.hashnode.dev/function-declaration-vs-function-expression-what-s-the-difference?utm_source=hashnode&utm_medium=feed) [Jainam Jain](https://hashnode.com/@jainamblogs) · [May 3](https://hashnode.com/posts/understanding-map-and-set-in-javascript/69f7736176c1469ba4c6b191) ### [Understanding Map and Set in JavaScript](https://understanding-javascript-methods.hashnode.dev/understanding-map-and-set-in-javascript?utm_source=hashnode&utm_medium=feed) When working with JavaScript, we usually start with objects and arrays to store data. They work fine in most cases.But as things grow, some limitations start showing up. That’s where Map and Set come 3 min read · [understanding-javascript-methods.hashnode.dev](https://understanding-javascript-methods.hashnode.dev/understanding-map-and-set-in-javascript?utm_source=hashnode&utm_medium=feed) [Shikhar Gupta](https://hashnode.com/@shiikharrr) · [Apr 15](https://hashnode.com/posts/functions-in-javascript/69dfa58a70e165e0d8bd8b21) ### [Functions in JavaScript](https://thecleancommit.hashnode.dev/functions-in-javascript?utm_source=hashnode&utm_medium=feed) The Foundation of Reusable Code 6 min read · [thecleancommit.hashnode.dev](https://thecleancommit.hashnode.dev/functions-in-javascript?utm_source=hashnode&utm_medium=feed) [Hitakshi](https://hashnode.com/@hitakshi) · [Mar 25](https://hashnode.com/posts/the-new-keyword-in-javascript/69c41c8110e664c5dacd155f) ### [The new Keyword in JavaScript](https://hitakshi120.hashnode.dev/the-new-keyword-in-javascript?utm_source=hashnode&utm_medium=feed) What the new keyword does The new keyword in JavaScript is an operator used to create an instance of a user-defined object type (such as a constructor function or a class). When called with a functio 8 min read · [hitakshi120.hashnode.dev](https://hitakshi120.hashnode.dev/the-new-keyword-in-javascript?utm_source=hashnode&utm_medium=feed) [Abhishek Yadav](https://hashnode.com/@abishekyadav) · [Mar 15](https://hashnode.com/posts/function-declaration-vs-function-expression-what-s-the-difference/69b6df39f4eb2f8b04af6556) ### [Function Declaration vs. Function Expression: What’s the Difference?](https://terminal-thoughts.hashnode.dev/function-declaration-vs-function-expression-what-s-the-difference?utm_source=hashnode&utm_medium=feed) Understand the difference between function declarations and expressions in JavaScript. Learn about hoisting, syntax, and when to use each in modern JS 4 min read · [terminal-thoughts.hashnode.dev](https://terminal-thoughts.hashnode.dev/function-declaration-vs-function-expression-what-s-the-difference?utm_source=hashnode&utm_medium=feed) [Rahul](https://hashnode.com/@LuharIlok) · [Mar 15](https://hashnode.com/posts/function-declaration-vs-function-expression/69b692a8f4eb2f8b045c49ab) ### [Function Declaration vs Function Expression](https://techgyaan.hashnode.dev/function-declaration-vs-function-expression?utm_source=hashnode&utm_medium=feed) Learn the difference between function declaration and function expression in JavaScript. Understand syntax, hoisting behavior, with practical examples 4 min read · [techgyaan.hashnode.dev](https://techgyaan.hashnode.dev/function-declaration-vs-function-expression?utm_source=hashnode&utm_medium=feed) [Mohammed Zahed](https://hashnode.com/@techpirate) · [Mar 15](https://hashnode.com/posts/arrow-functions-in-javascript-a-simpler-way-to-write-functions/69b6f7d8f4eb2f8b04c7a292) ### [Arrow Functions in JavaScript: A Simpler Way to Write Functions](https://webdevzahed.hashnode.dev/arrow-functions-in-javascript-a-simpler-way-to-write-functions?utm_source=hashnode&utm_medium=feed) Learn JavaScript arrow functions with simple examples. Understand syntax, parameters, implicit return, and differences from normal functions. 4 min read · [webdevzahed.hashnode.dev](https://webdevzahed.hashnode.dev/arrow-functions-in-javascript-a-simpler-way-to-write-functions?utm_source=hashnode&utm_medium=feed) [Pawan Kushwah](https://hashnode.com/@annodiya) · [Mar 15](https://hashnode.com/posts/function-declaration-vs-function-expression-what-s-the-difference/69b6f68cf4eb2f8b04c6455b) ### [Function Declaration vs Function Expression: What’s the Difference?](https://annodiya.hashnode.dev/function-declaration-vs-function-expression-what-s-the-difference?utm_source=hashnode&utm_medium=feed) Imagine you have a specific way you like your coffee made. Instead of explaining the entire recipe to your barista every single morning, you just say, "I’ll have the usual." In programming, a Function 2 min read · [annodiya.hashnode.dev](https://annodiya.hashnode.dev/function-declaration-vs-function-expression-what-s-the-difference?utm_source=hashnode&utm_medium=feed) [Divakar](https://hashnode.com/@divakar29) · [Mar 15](https://hashnode.com/posts/functions-in-javascript-expression-vs-declaration/69b69229f4eb2f8b045bc873) ### [Functions In JavaScript (Expression vs Declaration)](https://divakar29.hashnode.dev/functions-in-javascript-expression-vs-declaration?utm_source=hashnode&utm_medium=feed) Function in programming language is a set of code which you can execute whenever you want. Function helps us in maintaining large code bases provides modularity in our code. DRY (Do Not Repeat) princi 5 min read · [divakar29.hashnode.dev](https://divakar29.hashnode.dev/functions-in-javascript-expression-vs-declaration?utm_source=hashnode&utm_medium=feed) [Janardhan Verma](https://hashnode.com/@janardan-v) · [Mar 15](https://hashnode.com/posts/function-declaration-vs-function-expression-what-s-the-difference/69b6c6d6f4eb2f8b04967338) ### [Function Declaration vs Function Expression: What’s the Difference?](https://javascript-function.hashnode.dev/function-declaration-vs-function-expression-what-s-the-difference?utm_source=hashnode&utm_medium=feed) Suppose you need to perform an operation many times in code, for example finding the maximum of two numbers. Are you okay with writing the complete code again and again? let a = 10; let b = 20; let ma 5 min read · [javascript-function.hashnode.dev](https://javascript-function.hashnode.dev/function-declaration-vs-function-expression-what-s-the-difference?utm_source=hashnode&utm_medium=feed)