load-eruda.js

// definition
function loadScript(scriptUrl) {
	console.log('loading script', scriptUrl);
  const script = document.createElement('script');
  script.src = scriptUrl;
  document.body.appendChild(script);
  
  return new Promise((res, rej) => {
    script.onload = function() {
      res({message: 'script loaded'});
    }
    script.onerror = function (error) {
      rej(error.target);
    }
  });
}

function log(message) {
	console.log(message);
	span = document.createElement('p');
	span.innerHTML = message;
	document.body.appendChild(span);
}

// use
loadScript('https://cdn.jsdelivr.net/npm/eruda')
  .then((response) => {
    log(response.message);
	log(eruda);
	log('')
	for (let a in eruda) {
		log(a)
	}
	
    eruda.init();
  })
  .catch((error) => {
    log(error.message)
  });