Ajax实现跨域访问最新解决方案

$.ajax({
  type: 'get',
  url: 'http://xxx.com',
  data: {},
  dataType: 'jsonp',
  success: function (data) {
    
  },
  error: function (data) {
    mask.close();
    toast('请求失败');
  }
});

$.ajax({
  url: 'http://xxx.com',
  type: 'post',
  xhrFields:{
    withCredentials:true
  },
  data: {},
  success: function(res){
  },
  error: function(){
    alert('服务器发生错误！');
  }
});

header('Access-Control-Allow-Origin: http://xxx.com');
header('Access-Control-Allow-Credentials: true');
header('Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept');