serverless-api.js

// This API needs to be deployed to a server or serverless backend. 
// I used now.sh to deploy it. You can find a tutorial here : https://zeit.co/docs/v2/deployments/basics/

const { parse } = require('url');
const axios = require('axios');

module.exports = async (req, res) => {

    function similarity(s1, s2) {
        var longer = s1;
        var shorter = s2;
        if (s1.length < s2.length) {
          longer = s2;
          shorter = s1;
        }
        var longerLength = longer.length;
        if (longerLength == 0) {
          return 1.0;
        }
        return (longerLength - editDistance(longer, shorter)) / parseFloat(longerLength);
      }

      function editDistance(s1, s2) {
        s1 = s1.toLowerCase();
        s2 = s2.toLowerCase();

        var costs = new Array();
        for (var i = 0; i <= s1.length; i++) {
          var lastValue = i;
          for (var j = 0; j <= s2.length; j++) {
            if (i == 0)
              costs[j] = j;
            else {
              if (j > 0) {
                var newValue = costs[j - 1];
                if (s1.charAt(i - 1) != s2.charAt(j - 1))
                  newValue = Math.min(Math.min(newValue, lastValue),
                    costs[j]) + 1;
                costs[j - 1] = lastValue;
                lastValue = newValue;
              }
            }
          }
          if (i > 0)
            costs[s2.length] = lastValue;
        }
        return costs[s2.length];
      }

  const { query } = parse(req.url, true)
  const { hero = 'World' } = query;

  const resp = await axios.get('https://akabab.github.io/superhero-api/api/all.json');

  let foundData;
    resp.data.map( elem => {
      if((similarity(hero,elem.name)>=.8 || similarity(hero,elem.biography.fullName)>=.8) && !foundData) {
        foundData = elem;
      }
    });

    foundData ? res.end(JSON.stringify(foundData)) : res.end('Hero Not Found');

}