Error: `doctype 5` is deprecated, you must now use `doctype html`: Node.js Express App bug solved

I am using Visual Studio to create Node.js application. I created a Node project by selecting Blank Express Application project template from JavaScript project type.


After creating project I pressed F5 to run application. On running application I got following error


Solving this error is very easy. From views folder in project open layout.jade. You will find below code


First line of code contains doctype 5. You need to replace it with doctype html


Now go ahead and press F5 to run application. You should not get above exception and in browser expected output you will get as below,


I hope you find this post useful. Thanks for reading.

Published by

Dhananjay Kumar

Dhananjay Kumar is Developer Evangelist for Infragistics. He is a 8 times Microsoft MVP and well respected Developer Advocate in India.He is the author of 900+ Blog Posts, and can often be found speaking around India at conferences and hosting free workshops for programmers across the country. So far, he has hosted 60 free workshops on various topics like JavaScript, Angular, WCF, ASP.NET MVC, C#, Azure etc. Follow him on twitter @debug_mode for all the updates about his blog posts and workshops. You can send him email at debugmode [at] outlook [dot] com

One thought on “Error: `doctype 5` is deprecated, you must now use `doctype html`: Node.js Express App bug solved”

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