js 替换url参数

function replaceUrlParams(key, val) {
  let href = location.href;
  if (href.indexOf("?") === -1) return;
  var query = href.indexOf("?") + 1;
  var hash = href.indexOf("#") + 1;
  var first = href.substring(query, hash === 0 ? href.length : hash - 1);
  var sec = hash === 0 ? "" : href.substring(hash);
  first = first
    .split("&")
    .map(function (param) {
      return param.startsWith(key + "=") ? key + "=" + val : param;
    })
    .join("&");

  history.replaceState(
    "",
    "",
    href.substring(0, query) + first + (hash === 0 ? "" : "#" + sec)
  );
}