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HTML

              
                <html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function that fetches data from multiple APIs concurrently and returns a combined result using Promises and 'Promise.all()'</title>
</head>
<body>

</body>
</html>
              
            
!

CSS

              
                
              
            
!

JS

              
                 function fetchDataFromAPI(url) {
  return fetch(url)
    .then(response => {
      if (!response.ok) {
        throw new Error(`HTTP error! Status: ${response.status}`);
      }
      return response.json();
    });
}

function fetchMultipleAPIs(apiUrls) {
  const promises = apiUrls.map(url => fetchDataFromAPI(url));
  return Promise.all(promises);
}

// Example usage:
const apiUrls = [
  'https://jsonplaceholder.typicode.com/posts/4',
  'https://jsonplaceholder.typicode.com/posts/5',
  'https://jsonplaceholder.typicode.com/posts/6'
];

fetchMultipleAPIs(apiUrls)
  .then(results => {
    console.log('Combined Results:', results);
  })
  .catch(error => {
    console.log('Error:', error.message);
  });

              
            
!
999px

Console