Sistemas y Tecnologías Web: Servidor

Master de II. ULL. 1er cuatrimestre


Organization ULL-MII-SYTWS-2122   Classroom ULL-MII-SYTWS-2122   Campus Virtual SYTWS   Chat Chat   Profesor Casiano

Table of Contents

loadScript

loadScript

Here’s a callback-based function that loads a script from a specified src and adds it to the current document:

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function loadScript(src, callback) {
  let script = document.createElement('script');
  script.src = src;

  script.onload = () => callback(null, script);
  script.onerror = () => callback(new Error(`Script load error for ${src}`));

  document.head.append(script);
}

Rewrite the loadScript function using promises. Example of usage:

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let promise = loadScript("https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.js");

promise.then(
  script => alert(`${script.src} is loaded!`),
  error => alert(`Error: ${error.message}`)
);

promise.then(script => alert('Another handler...'));

Solution

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