I am trying to fetch JSON data from the WordPress Developer Reference site. I need to search a keyword without knowing if it's a function, class, hook, or method, which is part of the url I need to fetch. So I'm using Promise.all to cycle through all possible urls. It works if the response.status <= 299, throwing the error immediately, and if the response is ok, then it continues to .then. Fine, but occasionally it will return an ok status if the JSON exists and only returns an empty array. So I need to check if the JSON data is an empty array, which I can't seem to do in the first part. I can only check in the second part as far as I know. And if it throws the error it doesn't continue trying the other urls. Any suggestions?

var keyword = 'AtomParser';
const refs = ['function', 'hook', 'class', 'method'];

// Store the promises
let promises = [];

// Cycle through each type until we find one we're looking for
for (let t = 0; t < refs.length; t++) {
  const url =
    'https://developer.wordpress.org/wp-json/wp/v2/wp-parser-' +
    refs[t] +
    '?search=' +
    keyword;
  // console.log(url);
  promises.push(fetch(url));
}
Promise.all(promises)
  .then(function(response) {
    console.log(response[0]);

    // Get the status
    console.log('Status code: ' + response[0].status);
    if (response[0].status <= 299) {
      // The API call was successful!
      return response[0].json();
    } else {
      throw new Error('Broken link status code: ' + response[0].status);
    }
  })
  .then(function(data) {
    // This is the HTML from our response as a text string
    console.log(data);

    // Make sure we have data
    if (data.length == 0) {
      throw new Error('Empty Array');
    }

    // ref
    const reference = data[0];

    // Only continue if not null or empty
    if (reference !== null && reference !== undefined && data.length > 0) {
      // Success
      // Return what I want from the reference
    }
  })
  .catch(function handleError(error) {
    console.log('Error' + error);
  });

Is there some way to get the JSON data in the first part so I can check if it's in an array while I'm checking the response status?