Shiny htmloutput : s<!DOCTYPE html> on the top of page

shiny
,
1

The problem is: My project is shiny app based on inputs that generate a report that is dependent on Rmarkdown template document with parameters. I need to preview the report in the shiny app after entering these inputs that will affect these parameters.

The problem: that I found
on the top of page. See the attached photo.

The app code:
in UI part:
uiOutput('markdown')

in server part:
output$markdown <- renderUI({
HTML(markdownToHTML(render('HTMLesoApp.Rmd',output_format = html_document(),
params = list(A= input$search,
A0= input$author,
A1 = input$EsophagealCarcinomaProcedure,
A3 = input$EsophagealCarcinomaTumorSite))))})

if I used Knit function instead of render the problem disappear, but I can not pass the parameters inputs.

Capture
Capture1274×369 26.4 KB

2

I am no shiny expert but a few thing I spotted and puzzle me.

You trying to convert markdown to HTML here...

... but your render to a full HTML file using header and body.

This seems odd to me.

Know that in rmarkdown you have rmarkdown::html_fragment to generate a piece of HTML from Rmd (just the body).

Including a whole HTML page (including DOCTYPE - which what you see, <head> and <body>) may not be ideal and why you don't get the desired results

3

I tried your suggestion and still appear!
it could disappear if I chose knit function instead of render function.
but I can not pass the params ( user inputs ) to knit function.

Any other suggestions?
It appears that you are working for Rstudio, can you please ask one of our friends in Rstudio?

5

Can you share the code you tried now ? What change did you make ? Did you render as a fragment ? What does the HTML document generated by your render looks like ?

6

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