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CSS Base

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Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

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You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

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If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              <div class="btn-container">
<a id="btn" class="waves-effect waves-light btn">Get all URLS</a>

<div id="container"></div>

<pre id="result"></pre>

              body {
  margin: 0;
  min-height: 100vh;
  background: #004d4d;
#container > div {
  width: 150px;
  margin: 10px;
  padding: 10px;
  line-height: 12px;
  background: #ededed;
  display: inline-block;
  border: 2px solid #fff;
  animation-name: fade-in;
	animation-fill-mode: both;
	animation-duration: .3s;
.teal {
  background: #008080;

.btn-container {
  margin: 10px;

.card-title {
 font-size: 14px !important; 

@keyframes fade-in {
  0% { opacity: 0; }
  100% { opacity: 1; }

              // var axios = require('axios');

let AllDatas = [],
    AllDatasInError = [],
    urls = [],
    waitTime = 500, // the amount of time we wait between each batch of request
    start = 0,
    step = 2, // number of url we request
    position = 0,
    nbRequest = 12; // number of request 

AllDatas['total'] = 0; // total of data

let btn = document.getElementById('btn');

btn.addEventListener('click', function() {

function createUrl() {
    for (let i = 1; i <= nbRequest; i++) {         

// timer
const waitFor = (ms) => new Promise(r => setTimeout(r, ms));

// parallel REQUEST with AXIOS
async function getData(links) {
    try {
        const res = await axios.all(links.map(link => axios.get(link)));
        console.log('GetData Start time', new Date());
        return res;
    } catch (error) {

async function batchProcessing(urls) {
    const len = urls.length / step;
    // let result = [];
    console.log('batchProcessing Start time', new Date());

    // use of an interceptor to edit every response
    axios.interceptors.response.use(function (response) {
        // Do something with response data        
        let responseData = response.data;

        // const newVal = {};
        if (responseData.id) {
          responseData['position'] = `${position}/${len}`;
            // create html element
            AllDatas['total'] += 1;
        console.log('responseData', responseData);
        return responseData;
    }, function (error) {
        // Do something with response error
        return Promise.reject(error);
  // batch processing

    for(let index = 0; index < len; index ++) {
      var processingUrl  = urls.slice(start, start + step);
      start += step;
      position += 1;
      console.log('position', position + ' / ' + len);
      console.log('processingUrl',  processingUrl);
      // make the requests
      const res = await getData(processingUrl);
      AllDatas = AllDatas.concat(res);
      // break time
      await waitFor(waitTime);
    // we are now done
    console.log('End timer', new Date());
    // console.log('Final AllDatas', AllDatas);
  // document.querySelector('pre').innerHTML = AllDatas;


function addElement (data) { 
  console.log('element added', data);
  let mainDiv = document.getElementById("container"); 
  let newDiv = document.createElement("div");
  let newContent = `
          <div class="card">
            <div class="card-image">
              <img src="${data.thumbnailUrl}">
              <span class="card-title">
                Element ${data.id} 
            <div class="card-content">
              <p>${data.title}. (batch ${data.position})</p>
            <div class="card-action">
              <a href="${data.url}">See the source</a>

  // console.log('newContent', newContent);
  newDiv.innerHTML = newContent;  
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