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

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