parcel-bundler/lib/builtins/loaders/node/html-loader.js

Blazing fast, zero configuration web application bundler

var fs = require('fs');

module.exports = function loadHTMLBundle(bundle) {
  return new Promise(function(resolve, reject) {
    fs.readFile(__dirname + bundle, 'utf8', function(err, data) {
      if (err) {
        reject(err);
      } else {
        // wait for the next event loop iteration, so we are sure
        // the current module is fully loaded
        setImmediate(function() {
          resolve(data);
        });
      }
    });
  });
};