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In Our Application , We are getting a formatted Html string from a external library(Bryntnum - provides gantt chart features).

The Formatted Html is returned in a string format.

Our business need is to convert this html into vf page and render it as a pdf. When I just use the html string and use it in vf page all the css is loaded correctly.

Image ( apex page which is not rendered as pdf) apex page which is not rendered as pdf

Output Output when not renderred as pdf

Now if i try to render the same vf page as pdf it does not load any css. Adding renderaspdf to vf page.

Output: enter image description here

This is the original html string which is coming from a third party library. It would be really helpful if someone can help me on how i can get pdf to have css.

Steps to get the result. Open Developer Console in Salesforce. Create a dummy vf page. and Copy the below Html text which is inside the text file https://docs.google.com/document/d/1BV98W5ZQ84khhsNuRgCyItsnvKKSKcoRVjFe2GMbsE4/edit

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    In my experience, it completely ignores inline CSS and you are forced to actually use "style" attributes for the individual elements in the page. Total PITA.
    – Phil W
    Nov 12, 2021 at 12:19

1 Answer 1

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In my experience, you need to apply a few attributes to the apex:page, including applyHtmlTag and applyBodyTag. Here's an example that works:

Static Resource q361913

div {
    color : red;
}

Page

<apex:page renderAs="pdf" showChat="false" showHeader="false" applyHtmlTag="false" applyBodyTag="false">
    <html>
        <head>
            <link rel="stylesheet" href="{!URLFOR($Resource.q361913)}" />
        </head>
        <body>
            <div>
                Hello World
            </div>
            
        </body>    
    </html>
</apex:page>

Output

Sample PDF

Note that only CSS1 and CSS2 is supported, so any more advanced CSS may not render the way you expect.

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