“`”<\/p>\n
\u53c2\u8003\u56de\u7b54\uff1a<\/p>\n
<pre><code class=""language-javascript"" lang=""javascript"">var myNewAjax=function(url){
\n return new Promise(function(resolve,reject){
\n var xhr = new XMLHttpRequest();
\n xhr.open('get',url);
\n xhr.send(data);
\n xhr.onreadystatechange=function(){
\n if(xhr.status==200&&readyState==4){
\n var json=JSON.parse(xhr.responseText);
\n resolve(json)
\n }else if(xhr.readyState==4&&xhr.status!=200){
\n reject('error');
\n }
\n }
\n })
\n}
\n<\/code><\/pre><\/p>\n
\u00a0<\/p>\n
<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
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