H5 在微信加载？获取微信网页授权，页面重新加载一次？

Question

一进入页面，跳转到微信网页授权，拿code，此时页面重新加载了一次，而且还能回退，怎么不让它重新加载且禁止回退呢？

      window.location.replace(
        `https://open.weixin.qq.com/connect/oauth2/authorize?appid=xxxx&redirect_uri=${encodeURIComponent(
          location.href
        )}&response_type=code&scope=snsapi_base&state=wechat_redirect#wechat_redirect`
      );

Answer 1

function getQueryString(name) {
  const reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i');
  const r = window.location.search.substr(1).match(reg);
  if (r != null) return unescape(r[2]);
  return null;
}

if (!getQueryString('code')) {
  const newUrl = `https://open.weixin.qq.com/connect/oauth2/authorize?appid=xxxx&redirect_uri=${encodeURIComponent(
    location.href
  )}&response_type=code&scope=snsapi_base&state=wechat_redirect#wechat_redirect`;

  history.replaceState(null, null, newUrl);

  window.addEventListener('popstate', function (e) {
    e.preventDefault();
  });

  window.location.href = newUrl;
}