querystring.js

function parseQueryString(queryString) {
  const queryParams = {};

  if (typeof queryString!=="string"||queryString.length === 0) {
    return queryParams;
  }

  const keyValuePairs = queryString.split("&");

  for (const pair of keyValuePairs) {
     if (!pair.includes("=")) continue; 

    const equalIndex = pair.indexOf("=");

    const key = pair.slice(0, equalIndex);
    const value = pair.slice(equalIndex + 1);

    if (key === "") continue;
    
    queryParams[key] = value;
  }

  return queryParams;
}

console.log(parseQueryString("color=blue&quality=good"))
console.log(parseQueryString("equation=x=y+1"))
console.log(parseQueryString(""))

module.exports = parseQueryString;