$.ajax({
    url:'',
    type:'POST', //GET
    async:true,    //或false,是否异步
    data:{
        name:'llc',
        age:22
    },
    timeout:5000,    //超时时间
    dataType:'json',    //返回的数据格式:json/xml/html/script/jsonp/text
    beforeSend:function(xhr){
        console.log(xhr)
        console.log('发送前')
    },
    success:function(data,textStatus,jqXHR){
        console.log(data);
    },
    error:function(xhr,textStatus){
        console.log('错误',xhr.responseText);
        console.log(xhr);
        console.log(textStatus);
    }

})

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