---
title: "Async and Defer Script Loading"
description: "Learn how to avoid render blocking JavaScript using async and defer scripts."
author:
  name: "Kamran Ahmed"
  url: "https://twitter.com/kamranahmedse"
  imageUrl: "/authors/kamranahmedse.jpeg"
seo:
  title: "Async and Defer Script Loading - roadmap.sh"
  description: "Learn how to avoid render blocking JavaScript using async and defer scripts."
isNew: false
type: "visual"
date: 2021-09-10
sitemap:
  priority: 0.7
  changefreq: "weekly"
tags:
  - "guide"
  - "visual-guide"
  - "guide-sitemap"
---

[![Avoid Render Blocking with Async and Defer](/guides/avoid-render-blocking-javascript-with-async-defer.png)](/guides/avoid-render-blocking-javascript-with-async-defer.png)