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How To Set Doctype in HTML5

Updated on September 24, 2020
How To Set Doctype in HTML5

Introduction

The <!DOCTYPE html> tag is a required preamble for HTML documents. Here’s how you use it.

Prerequisites

Setting doctype in HTML5

To set the doctype in HTML5, add this to the top of your html code:

index.html
<!DOCTYPE html>

Setting the doctype remains important for the support of legacy browsers.

Conclusion

Setting the doctype on your code is important, but it’s only the first step. For a more comprehensive review of the HTML5 markup language, explore our series, How To Build a Website in HTML.

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About the author(s)

Alligator
Alligator
Author
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Alligator.io is a developer-focused resource that offers tutorials and insights on a wide range of modern front-end technologies, including Angular 2+, Vue.js, React, TypeScript, Ionic, and JavaScript.

Matt Abrams
Matt Abrams
Editor
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Supporting the open-source community one tutorial at a time. Former Technical Editor at DigitalOcean. Expertise in topics including Ubuntu 22.04, Ubuntu 20.04, CentOS, and more.

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