封装js发送http请求

var http = {};http.quest = function (option, callback) {    var url = option.url;    var method = option.method;    var data = option.data;    var timeout = option.timeout || 0;    var xhr = new XMLHttpRequest();    (timeout > 0) && (xhr.timeout = timeout);    xhr.onreadystatechange = function () {        if (xhr.readyState == 4) {            if (xhr.status >= 200 && xhr.status < 400) {            var result = xhr.responseText;            try {result = JSON.parse(xhr.responseText);} catch (e) {}                callback && callback(null, result);            } else {                callback && callback('status: ' + xhr.status);            }        }    }.bind(this);    xhr.open(method, url, true);    if(typeof data === 'object'){        try{            data = JSON.stringify(data);        }catch(e){}    }    xhr.send(data);    xhr.ontimeout = function () {        callback && callback('timeout');        console.log('%c连%c接%c超%c时', 'color:red', 'color:orange', 'color:purple', 'color:green');    };};http.get = function (url, callback) {    var option = url.url ? url : { url: url };    option.method = 'get';    this.quest(option, callback);};http.post = function (option, callback) {    option.method = 'post';    this.quest(option, callback);};

使用方法

//普通get请求http.get('http://www.baidu.com',function(err,result){});//定义超时时间(单位毫秒)http.get({url:'http://www.baidu.com',timeout:1000},function(err,result){});//post请求http.post({url:'http://www.baidu.com',data:'123',timeout:1000},function(err,result){});