2019-06-04
1298
#vue
Jake Dohm
2176
Jun 4, 2019 â‹… 4 min read

Cleaning up your Vue.js code with ES6+

Jake Dohm

Recent posts:

Rust Project for Web Services LogRocket Article

The best way to structure Rust web services

Learn how to structure Rust web services with clean architecture, Cargo workspaces, and modular crates for scalable, maintainable backends.

Jude Miracle
Oct 2, 2025 â‹… 2 min read
andrew evans headshot

A spec-first workflow for building with agentic AI

Andrew Evans gives his take on agentic AI and walks through a step-by-step method to build a spec-first workflow using Claude Code.

Andrew Evans
Oct 1, 2025 â‹… 18 min read

How to use TanStack DB to build reactive, offline-ready React apps

This tutorial shows how to use TanStack DB to build a task manager with live queries, optimistic updates, and offline support, delivering a fast, resilient UX with less boilerplate than traditional React state management.

Emmanuel John
Oct 1, 2025 â‹… 12 min read
how to build a full-stack application with Tanstack Start

A step-by-step guide to building a full-stack app with TanStack Start

Follow this step-by-step guide to building a full-stack recipe application with TanStack Start, the new full-stack React framework.

David Omotayo
Sep 30, 2025 â‹… 27 min read
View all posts

6 Replies to "Cleaning up your Vue.js code with ES6+"

  1. Great tips, one question, when I use the arrow functions I get undefined on this… Any suggestion?

    1. Hi, Maximiliano, thanks for reading!

      So, if “this” is returning “undefined”, you’re probably using arrow functions in the wrong place. You shouldn’t use them when defining a function for your data, or lifecycle methods, as you do want this to be bound to the context. So doing { mounted: () => { console.log(this.hello) } } will console log undefined (rightly).

      You should use arrow functions _within_ your methods, lifecylcles, etc. so that the context of “this” will always be your component.

      For more information on arrow functions, check out this article: https://codeburst.io/javascript-arrow-functions-for-beginners-926947fc0cdc

  2. (hello = 0) Destructuring works let { hello } = this and then I hello = 1 in the method and the value changes if I assign it to a different value but when a different method later calls the data() for that particular data it is as-if it was never changed at all because when I check it again it is still hello = 0.

    1. Hi, Lou!

      So the reason mutating the value of “hello” doesn’t work, is that primitive values (like a number or string) are copied by value, not reference. When you do let { hello } = this, what it’s really doing is let hello = this.hello, which *copies* the value of this.hello into a new local variable. So when you mutate your local variable, it won’t change the value of this.hello.

      For more information, check out this AWESOME article on value vs reference in JS: https://codeburst.io/explaining-value-vs-reference-in-javascript-647a975e12a0

Leave a Reply