/** * 封装ajax */function ajax () { ?var ajaxData = { ???type: arguments[0].type || ‘GET‘, ???url: arguments[0].url || ‘‘, ???async: arguments[0].async || ‘true‘, ???data: arguments[0].data || null, ???dataType: arguments[0].dataType || ‘text‘, ???contentType: arguments[0].contentType || ‘application/x-www-form-urlencoded‘, ???beforeSend: arguments[0].beforeSend || function () { }, ???success: arguments[0].success || function () { }, ???error: arguments[0].error || function () { } ?} ?ajaxData.beforeSend() ?var xhr = createxmlHttpRequest() ?xhr.responseType = ajaxData.dataType ?xhr.open(ajaxData.type, ajaxData.url, ajaxData.async) ?xhr.setRequestHeader(‘Content-Type‘, ajaxData.contentType) ?xhr.send(convertData(ajaxData.data)) ?xhr.onreadystatechange = function () { ???if (xhr.readyState == 4) { ?????if (xhr.status == 200) { ???????ajaxData.success(xhr.response) ?????} else { ???????ajaxData.error() ?????} ???} ?}}function createxmlHttpRequest () { ?if (window.ActiveXObject) { ???return new ActiveXObject(‘Microsoft.XMLHTTP‘) ?} else if (window.XMLHttpRequest) { ???return new XMLHttpRequest() ?}}function convertData (data) { ?if (typeof data === ‘object‘) { ???var convertResult = ‘‘ ???for (var c in data) { ?????convertResult += c + ‘=‘ + data[c] + ‘&‘ ???} ???convertResult = convertResult.substring(0, convertResult.length - 1) ???return convertResult ?} else { ???return data ?}}此代码复制自 https://www.cnblogs.com/webSong/p/7224546.html
仿jq封装ajax
原文地址：https://www.cnblogs.com/handsome-jm/p/8193346.html