直接上代码,(前几天项目出差部署去叻)

const ajax = function (options = {}) {option.type = (options.type || 'GET').toUpperCase();let data = [];for(let i in options.data) {data.push(encodeURIComponent(i) + '=' + encodeURIComponent (options.data[i]));}data = data.join('&');const xhr = new XMLHttpRequest();xhr.onreadystatechange = function () {if (xhr.readyState === 4) {const status = xhr.status;if (status >= 200 && status < 300) {options.success &&options.success(JSON.parse(xhr.responseText),xhr.responseXML);} else {options.error && options.error(status);}}};if (options.type === 'GET') {xhr.open('GET', options.url + '?' + data, true);xhr.send(null);} else if (options.type === 'POST') {xhr.open('POST', options.url, true);xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');xhr.send(data);}
};
参考 《vue.js实战》P231