正则表达式解析查询字符串

function parseQueryString(f) {
  const d = /(([^?&=]+)(?:=([^?&=]*))*)/g;
  const a = {};

  let b;
  let c;
  let e;

  while (b = d.exec(f)) {
    c = b[2];
    e = b[3] || '';
    a[c] = decodeURIComponent(e);
  }

  return a;
}

parseQueryString(window.location.search);