Referencing an external stylesheet from the Marketo custom form CSS area

[Mariano_Adunse]

Hi all, 

As the title (hopefully suggests), I've created a universal/global stylsheet for a selection of forms in our Marketo instance that I would like to reference from multiple forms. 

What would be the best method to achieve this?

So far I've tried a simple @import which doesn't work in custom CSS under the form wizard. Is there another way?

Thanks!

[SanfordWhiteman]

Insert using JS, following the guidelines here: https://blog.teknkl.com/add-forms-behaviors-inside-rich-text/ 

Example:

<script>
MktoForms2.whenReady(function(form){
  var formEl = form.getFormElem()[0];

  if( formEl.getAttribute("data-inline-behaviors-loaded") == "true" ) {
    return;
  }

  formEl.setAttribute("data-inline-behaviors-loaded", "true");

  var externalCSS = document.createElement("link");
  externalCSS.rel = "stylesheet";
  externalCSS.type = "text/css";
  externalCSS.href = "https://www.example.com/my.css";
  document.head.appendChild(externalCSS);
});
</script>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

[SanfordWhiteman]

Also, please delete your duplicate thread in the other space, it just adds to confusion.

[Mariano_Adunse]

Hi, no idea how to delete it but please feel free to (if you're an admin).

Thanks for your help!

[Mariano_Adunse]

Hi, just a quick question pertaining to that JS Snippet... the guide you linked to states that the code should appear on the landing page housing the form. But, I would like the CSS to apply across multiple forms, not just the one form on that landing page...

[SanfordWhiteman]

the guide you linked to states that the code should appear on the landing page housing the form.

The guide is for adding the code to a Rich Text area. Not to an LP. The code then runs everywhere that form appears, including on non-Marketo pages.

But you can't automatically include the same Rich Text on all forms, if that's what you're saying... just like you can't automatically include the same field on all forms. (You should be striving for just a few global forms, anyway.)

[Crystal_Pacheco]

The @import css in the form css should've worked. I've done this on multiple occasions. 

1 - Edit form 

2 - Form Settings

3 - Edit custom css

4 - Paste the snippet with your URL to your Marketo form css.

/* Add your custom CSS below */
@import url(https://YourMarketoURL.com/rs/XXX-XXX-XXX/images/form-css-2019.css); /* @import comes first */‍‍

See if the form.css URL resolves this way.

[Mariano_Adunse]

There has to be something seriously wrong with the way the CSS is being read and interpreted by the browser. I think there must be a request that isn't being run when @import is used as opposed to direct CSS definitions in the stylesheet). 

I'm using @ import exactly as it should be used and it still isn't working (I've also made sure I've approved the web form just in case before previewing it).

[Crystal_Pacheco]

That's odd, you did all the correct steps.

The next thing to do would be to examine the page with Inspector from Google Chrome and see if there are any console errors.
Open the form preview in Google Chrome, right click inside the window, select Inspect. 

Select Console and examine if there are any errors, it could be a CORS error or an http / https error.

Make sure the file is local to your Marketo instance.

If there are no errors, you should examine the css file itself.
 
Here's a css snippet to test the form label to see if its reading the file at all.

.mktoForm label {
  	color: #757575!important;
	font-size:20px!important;
	margin-bottom:0px!important;
	width:100%!important;
	font-family:Arial,sans-serif!important;
	font-weight:bold!important;
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

[SanfordWhiteman]

Make sure the file is local to your Marketo instance.

That's not actually necessary.