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A
Anonymous
July 30, 2015
Question

Missing HTML5 Doctype Error

  • July 30, 2015
  • 3 replies
  • 5747 views

Hi,

I'm creating landing page templates and I keep getting this error. Does anyone know what this means?

  • Missing HTML5 Doctype
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3 replies

Kenny_Elkington
Adobe Employee
Kenny_ElkingtonAdobe Employee
Adobe Employee
July 30, 2015

Hi Amanda,

You probably need to add this to the top of your template:

<!DOCTYPE html>

This line let's the browser know what HTML version is in use in the document.

Justin_Cooperm2
Justin_Cooperm2
Level 10
July 30, 2015

If you click "Create New Landing Page Template" it will automatically have the right DOCTYPE inserted for you...were you copy and pasting?

Justin

Will_Etling
Will_Etling
Level 2
February 8, 2019

I was getting this error. Turns out I had a blank line as line 1 of the template. <!DOCTYPE html> *has* to be on line 1. Thought this may help others.

    Dave_Roberts
    Dave_Roberts
    Level 10
    February 10, 2019

    I've seen this too Will, even when the doctype is declared on line two, if line one is blank it'll error out.

    For what it's worth, I've seen this (and lots of other) little errors come as a result of copy/pasting for your favorite text-editing program (working offline) and have been able to reduce a bunch of these kinds of errors in my workflow by starting to work within the Marketo editor rather than the back-and-forth copy/paste process.

      SanfordWhiteman
      SanfordWhiteman
      Level 10
      February 10, 2019

      FWIW... it's not an error standards-wise. HTML5 explicitly allows whitespace or even whole comments before the doctype, but Marketo doesn't.

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