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Editorial Team
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Asked: 2026-06-02T00:08:23+00:00

How do you change doctypes in HAML for one particular view layout? All other

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How do you change doctypes in HAML for one particular view layout? All other pages for the system need to remain HTML5, however I’m needing a particular type for one special exception.

On Rails 3.1.x I’ve attempted several different ways to change my doctype from 5 to 4.01 to no avail. I’ve looked at the following for guidance: http://haml-lang.com/docs/yardoc/file.HAML_REFERENCE.html#doctype_

It seems as though I cannot force the :format option within a template.

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1 Answer

  1. Editorial Team

    How about the following workaround?

    # in the top of application.html.haml
- if @use_4_01
  <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
- else
  !!!

    Set somewhere in controller @use_4_01 and you’ll get this old doctype.

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