docsify/src/plugins/external-script.js

function handleExternalScript() {
  const container = Docsify.dom.getNode('#main');
  const scripts = Docsify.dom.findAll(container, 'script');

  for (let i = scripts.length; i--; ) {
    const script = scripts[i];

    if (script && script.src) {
      const newScript = document.createElement('script');

      Array.prototype.slice.call(script.attributes).forEach(attribute => {
        newScript[attribute.name] = attribute.value;
      });

      script.parentNode.insertBefore(newScript, script);
      script.parentNode.removeChild(script);
    }
  }
}

const install = function(hook) {
  hook.doneEach(handleExternalScript);
};

window.$docsify.plugins = [].concat(install, window.$docsify.plugins);