JS Query String to Object

Convert “a=1&b=2” into {a:”1”, b:”2”}.

function str2Obj(str){
  if (typeof str !== 'string') return str;
  if (str.indexOf('&') < 0 && str.indexOf('=') < 0) return {};
  return str.split('&').reduce((acc,pair)=>{
    if(pair.includes('=')){
      const [k,v] = pair.split('=');
      acc[k]=v;
    }
    return acc;
  },{});
}