/**
* ajax 封装
* @param {obj{url,type,data,success,error}} obj
*/
function ajax (obj) {
obj = obj || {};
obj.url = obj.url || '';
obj.type = (obj.type || 'GET').toUpperCase();
let params = formatParams(obj.data);
let xhr = null;
// 兼容性
if (window.XMLHttpRequest) {
xhr = new XMLHttpRequest();
} else {
xhr = new ActiveXObject('Microsoft.XMLHTTP');
}
// 发送请求
if (obj.type === 'GET') {
xhr.open(obj.type, obj.url + '?' + params, true);
xhr.send(null);
} else if (obj.type === 'POST') {
xhr.open(obj.type, obj.url, true);
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xhr.send(params);
}
// 响应
xhr.onreadystatechange = function () {
if (xhr.readyState === 4) {
if (xhr.status >= 200 && xhr.status < 300 || xhr.status == 304) {
obj.success && obj.success(xhr.responseText);
} else {
obj.error && obj.error(xhr);
}
}
}
// 格式化请求参数
function formatParams (data) {
let arr = [];
for (let i in obj) {
arr.push(i + '=' + obj[i]);
}
return arr.join('&');
}
}
// 使用
ajax({
url: '',
type: 'GET',
data: {
user: 'user',
password: 'password'
},
success: function (data) {
console.log(data)
},
error: function (e) {
console.log(e);
}
});
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