微信动态修改title标签

titleInit(val){
  document.title = val;
  var i = document.createElement('iframe');
  i.src = '//m.baidu.com/favicon.ico';
  i.style.display = 'none';
  i.onload = function() {
    setTimeout(function(){
      i.remove();
    }, 10)
  };
  document.body.appendChild(i);
},