Url params to object

url_params_to_object.js

a.replace('?', '')
  .split('&')
  .reduce((accumulator, currentValue) => { 
    const pos = currentValue.indexOf('='); 
    const key = currentValue.slice(0, pos);
    const value = currentValue.slice(pos+1);    
    accumulator[key] = value; 
    return accumulator;
  }, {});