vue监听 浏览器后退 前进按钮

if (window.history && window.history.pushState) {
  window.addEventListener('popstate', goBack, false);
}
window.history.pushState('forward', null, ''); //在IE中必须得有这两行
window.history.forward(1);
function goBack() {
  let history = store.state.urlHistory;
  if(history.length > 1) {
    router.push(history[history.length - 3]);
  } else {
    router.push('/');
  }
  window.history.pushState('forward', null, '');
  window.history.forward(1);
}

onBeforeUnmount(() => {
  window.removeEventListener('popstate', goBack, false);
})