layui.use(["upload", "jquery", "layer"], function() { 

  var $ = layui.jquery,

    layer = layui.layer 
    upload = layui.upload;

   // 给ajax请求统一设置,这里设置以后下面所有的ajax请求中都会有设置中的属性

  $.ajaxSetup({

     'async': false,

                // 发送cookie
                xhrFields: {
                    withCredentials: true
                }

  })

  //上传文件
        upload.render({
                elem: '#id'
                ,url: ''', //改成您自己的上传接口
                accept: 'file' //普通文件
                ,done: function(res){
                    layer.msg('上传成功');
                    console.log(res);
                    /* 处理数据 */
                }
          });

})

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