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.

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

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

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

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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,

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

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Published by Dhananjay Kumar

Dhananjay kumar is an independent trainer , a consultant and a programmer from India. He has mentored more than 1000 professionals and known for his unique way of teaching. He has been part of the multiple projects for big clients. He is a well known blogger and speaker. He has been awarded Microsoft MVP award 5 times in a row. For more you can reach him 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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