How To Convert Html To Rtf Using Javascript

November 30, 2023 Post a Comment

I have an input HTML file with header and footer. It needs to be converted to RTF. The header/footer of HTML should be repeated in the resultant RTF file. Is there any plugin to co

Solution 1:

You can use this converter

However it does not address bullet points (ul, li elements)

function convertHtmlToRtf(html) {
  if (!(typeof html ==="string"&& html)) {
      return null;
  }

  var tmpRichText, hasHyperlinks;
  var richText = html;

  // Singleton tags
  richText = richText.replace(/<(?:hr)(?:\s+[^>]*)?\s*[\/]?>/ig, "{\\pard \\brdrb \\brdrs \\brdrw10 \\brsp20 \\par}\n{\\pard\\par}\n");
  richText = richText.replace(/<(?:br)(?:\s+[^>]*)?\s*[\/]?>/ig, "{\\pard\\par}\n");

  // Empty tags
  richText = richText.replace(/<(?:p|div|section|article)(?:\s+[^>]*)?\s*[\/]>/ig, "{\\pard\\par}\n");
  richText = richText.replace(/<(?:[^>]+)\/>/g, "");

  // Hyperlinks
  richText = richText.replace(
      /<a(?:\s+[^>]*)?(?:\s+href=(["'])(?:javascript:void\(0?\);?|#|return false;?|void\(0?\);?|)\1)(?:\s+[^>]*)?>/ig,
      "{{{\n");
  tmpRichText = richText;
  richText = richText.replace(
      /<a(?:\s+[^>]*)?(?:\s+href=(["'])(.+)\1)(?:\s+[^>]*)?>/ig,
      "{\\field{\\*\\fldinst{HYPERLINK\n\"$2\"\n}}{\\fldrslt{\\ul\\cf1\n");
  hasHyperlinks = richText !== tmpRichText;
  richText = richText.replace(/<a(?:\s+[^>]*)?>/ig, "{{{\n");
  richText = richText.replace(/<\/a(?:\s+[^>]*)?>/ig, "\n}}}");

  // Start tags
  richText = richText.replace(/<(?:b|strong)(?:\s+[^>]*)?>/ig, "{\\b\n");
  richText = richText.replace(/<(?:i|em)(?:\s+[^>]*)?>/ig, "{\\i\n");
  richText = richText.replace(/<(?:u|ins)(?:\s+[^>]*)?>/ig, "{\\ul\n");
  richText = richText.replace(/<(?:strike|del)(?:\s+[^>]*)?>/ig, "{\\strike\n");
  richText = richText.replace(/<sup(?:\s+[^>]*)?>/ig, "{\\super\n");
  richText = richText.replace(/<sub(?:\s+[^>]*)?>/ig, "{\\sub\n");
  richText = richText.replace(/<(?:p|div|section|article)(?:\s+[^>]*)?>/ig, "{\\pard\n");

  // End tags
  richText = richText.replace(/<\/(?:p|div|section|article)(?:\s+[^>]*)?>/ig, "\n\\par}\n");
  richText = richText.replace(/<\/(?:b|strong|i|em|u|ins|strike|del|sup|sub)(?:\s+[^>]*)?>/ig, "\n}");

  // Strip any other remaining HTML tags [but leave their contents]
  richText = richText.replace(/<(?:[^>]+)>/g, "");

  // Prefix and suffix the rich text with the necessary syntax
  richText ="{\\rtf1\\ansi\n"+ (hasHyperlinks ?"{\\colortbl\n;\n\\red0\\green0\\blue255;\n}\n" : "") + richText +"\n}";

  return richText;
}

Solution 2:

After a bit of search I found a working solution:

https://www.npmjs.com/package/html-to-rtf

With html-to-rtf the conversion is easy (here's a piece of code based on browserify):

var htmlToRtf = require('html-to-rtf');
var htmlText = "<div>...</div>"; //or whatever html you want to transformvar htmlAsRtf = htmlToRtf.convertHtmlToRtf(htmlText); // html transformed to rtf

This solution worked for me. Without browserify you'll have to find implied js inside downloaded modules with npm and link them to your html page.

Solution 3:

No such thing I'm afraid. I checked into this when looking for any HTML to RTF converter. Unfortunately they are a rare item.

Your only option would be the make one based on the RTF specs. https://msdn.microsoft.com/en-us/library/aa140277(v=office.10).aspx

Solution 4:

I applied @Samra solution and it was working good. But then I spotted a bug in the output: some text was cut off. After a lot of investigation, it seemed to be about HTML comments () weren't being handled properly. My solution was to add this richText transformation as the first one:

// Delete HTML comments
richText = richText.replace(/<!--[\s\S]*?-->/ig,"");

Solution 5:

According to Francisco Valles answer i created a bundle to easily include it your web-project:

https://github.com/geraphl/javascript-html-to-rtf-browser

<scriptsrc="~/js/html-to-rtf-browser.min.js"></script>

Then you can convert html to microsofts rtf format by adding

var htmlToRtfLocal = newwindow.htmlToRtf();
var rtfContent = htmlToRtfLocal.convertHtmlToRtf(htmlContent);

to you javascript.

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