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Embedding An R Htmlwidget Into Existing Webpage

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I am trying to embed an R htmlwidget into an existing webpage -- a webpage that already has bootstrap and styling applied. For example, consider the following webpage (note where t

Solution 1:

The htmlwidget-Package offers a way to save the pieces for the widget separately as follows:

library(dygraphs)
d1 <- dygraph(nhtemp, main = "New Haven Temperatures") %>% 
  dyRangeSelector(dateWindow = c("1920-01-01", "1960-01-01"))

saveWidget(d1, file = "widget_file.html", selfcontained = FALSE)

Which results in the following files/dirs:

widget_file.html
widget_file_files
  /dygraphs-1.1.1
    ..
  /dygraphs-binding-0.6
    ..
  /htmlwidgets-0.5
    ..
  /jquery-1.11.1
    ..
  /moment-2.8.4  
    ..
  /moment-timezone-0.2.5
    ..

And widget_file.html reads as follows:

<!DOCTYPE html><html><head><metacharset="utf-8"/><scriptsrc="widget_file_files/htmlwidgets-0.5/htmlwidgets.js"></script>
...
<scriptsrc="widget_file_files/dygraphs-binding-0.6/dygraphs.js"></script></head><bodystyle="background-color:white;"><divid="htmlwidget_container"><divid="htmlwidget-2956"style="width:960px;height:500px;"class="dygraphs"></div></div><!-- THE JSON DATA --><scripttype="application/json"data-for="htmlwidget-2956">
{THEJSONDATAYOUWERELOOKINGFOR}
</script><!-- THE JSON DATA --><scripttype="application/htmlwidget-sizing"data-for="htmlwidget-2956">{Widget-Styling-Json}
</script></body></html>

So you can edit your html as follows:

<!DOCTYPE html><htmllang="en"><head><metacharset="UTF-8"><title>Document</title><!-- Begin of scripts to run the widget --><scriptsrc="widget_file_files/htmlwidgets-0.5/htmlwidgets.js"></script><scriptsrc="widget_file_files/jquery-1.11.1/jquery.min.js"></script><linkhref="widget_file_files/dygraphs-1.1.1/dygraph.css"rel="stylesheet" /><scriptsrc="widget_file_files/dygraphs-1.1.1/dygraph-combined.js"></script><scriptsrc="widget_file_files/moment-2.8.4/moment.js"></script><scriptsrc="widget_file_files/moment-timezone-0.2.5/moment-timezone-with-data.js"></script><scriptsrc="widget_file_files/dygraphs-binding-0.6/dygraphs.js"></script><!-- End of scripts to run the widget --><!-- Begin Widget styling --><scripttype="application/htmlwidget-sizing"data-for="htmlwidget-2956">{"viewer":{"width":450,"height":350,"padding":10,"fill":true},"browser":{"width":960,"height":500,"padding":40,"fill":true}}</script><!-- End widget Styling --><!-- Begin Data for the widget--><scripttype="application/json"data-for="htmlwidget-2956">{"x":{"attrs":{"title":"New Haven Temperatures","labels":["year","V1"],"legend":"auto","retainDateWindow":false,"axes":{"x":{"pixelsPerLabel":60}},"showRangeSelector":true,"dateWindow":["1920-01-01T00:00:00Z","1960-01-01T00:00:00Z"],"rangeSelectorHeight":40,"rangeSelectorPlotFillColor":" #A7B1C4","rangeSelectorPlotStrokeColor":"#808FAB","interactionModel":"Dygraph.Interaction.defaultModel"},"scale":"yearly","annotations":[],"shadings":[],"events":[],"format":"date","data":[["1912-01-01T00:00:00Z","1913-01-01T00:00:00Z","1914-01-01T00:00:00Z","1915-01-01T00:00:00Z","1916-01-01T00:00:00Z","1917-01-01T00:00:00Z","1918-01-01T00:00:00Z","1919-01-01T00:00:00Z","1920-01-01T00:00:00Z","1921-01-01T00:00:00Z","1922-01-01T00:00:00Z","1923-01-01T00:00:00Z","1924-01-01T00:00:00Z","1925-01-01T00:00:00Z","1926-01-01T00:00:00Z","1927-01-01T00:00:00Z","1928-01-01T00:00:00Z","1929-01-01T00:00:00Z","1930-01-01T00:00:00Z","1931-01-01T00:00:00Z","1932-01-01T00:00:00Z","1933-01-01T00:00:00Z","1934-01-01T00:00:00Z","1935-01-01T00:00:00Z","1936-01-01T00:00:00Z","1937-01-01T00:00:00Z","1938-01-01T00:00:00Z","1939-01-01T00:00:00Z","1940-01-01T00:00:00Z","1941-01-01T00:00:00Z","1942-01-01T00:00:00Z","1943-01-01T00:00:00Z","1944-01-01T00:00:00Z","1945-01-01T00:00:00Z","1946-01-01T00:00:00Z","1947-01-01T00:00:00Z","1948-01-01T00:00:00Z","1949-01-01T00:00:00Z","1950-01-01T00:00:00Z","1951-01-01T00:00:00Z","1952-01-01T00:00:00Z","1953-01-01T00:00:00Z","1954-01-01T00:00:00Z","1955-01-01T00:00:00Z","1956-01-01T00:00:00Z","1957-01-01T00:00:00Z","1958-01-01T00:00:00Z","1959-01-01T00:00:00Z","1960-01-01T00:00:00Z","1961-01-01T00:00:00Z","1962-01-01T00:00:00Z","1963-01-01T00:00:00Z","1964-01-01T00:00:00Z","1965-01-01T00:00:00Z","1966-01-01T00:00:00Z","1967-01-01T00:00:00Z","1968-01-01T00:00:00Z","1969-01-01T00:00:00Z","1970-01-01T00:00:00Z","1971-01-01T00:00:00Z"],[49.9,52.3,49.4,51.1,49.4,47.9,49.8,50.9,49.3,51.9,50.8,49.6,49.3,50.6,48.4,50.7,50.9,50.6,51.5,52.8,51.8,51.1,49.8,50.2,50.4,51.6,51.8,50.9,48.8,51.7,51,50.6,51.7,51.5,52.1,51.3,51,54,51.4,52.7,53.1,54.6,52,52,50.9,52.6,50.2,52.6,51.6,51.9,50.5,50.9,51.7,51.4,51.7,50.8,51.9,51.8,51.9,53]]},"evals":["attrs.interactionModel"]}</script><!-- End Data for the widget--></head><body><p>This is a test.</p><divid="htmlwidget_container"><divid="htmlwidget-2956"style="width:960px;height:500px;"class="dygraphs"></div></div><p>A closing paragraph.</p></body></html>

This will leave you with the json-data hardcoded within the html-document (see my ). If you want to load the data dynamically you can use e.g.

json_dat <- readLines("widget_file.html")[18]
cat(sub("</script>","",sub('<script type=\"application/json\" data-for=.*\">', "", json_dat)), file = "./widget_file_files/my_data.json")

To save the json-data as ./widget_file_files/my_data.json and then load it within the html. If you are using PHP you can do:

<scripttype="application/json"data-for="htmlwidget-2956"><?phpinclude('widget_file_files/my_data.json'); ?></script>

If you want to use a pure JS solution maybe have a look at http://api.jquery.com/jquery.getjson/ and the widget_file_files/htmlwidgets-0.5/htmlwidgets.js-File how the json-data is bound at the moment...

P.S.: As this question got a lot of attention already you could also contact the package developer and ask him to further "un-selfcontain" the "selfcontained" option in htmlwidgets:::saveWidget: Meaning to save the json-data separately and include it e.g. via jquery.getjson

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