nodemailer-plugin-inline-base64/src/replaceBase64Images.js

Nodemailer plugin that will inline base64 images

var replaceBase64Images = function(html, getCid) {
  //Replace html base64 images
  var result = html.replace(/(<img[\s\S]*? src=['"])data:(image\/(?:png|jpe?g|gif));base64,([\s\S]*?)(['"][\s\S]*?>)/g, function(g, start, mimeType, base64, end) {
    return start + 'cid:' + getCid(mimeType, base64) + end;
  });

  //Replace css base64 images
  return result.replace(
    /(url\(\s*('|"|&quot;|&QUOT;|&apos;|&#3[49];|&#[xX]2[27];)?)data:(image\/(?:png|jpe?g|gif));base64,([\s\S]*?)(\2\s*\))/g,
    function(g, start, quot, mimeType, base64, end) {
      return start + 'cid:' + getCid(mimeType, base64) + end;
    }
  );
};

module.exports = replaceBase64Images;