Ajax上传文件时获取上传文件时的进度并显示进度条

function uploadFile(){ $( ".file" ).change( function(){ var formData2 = $( this ).parent(); //获得表单 $.ajax({ url: 'xxx&r=' + Math .random(), type: 'POST' , Accept: 'text/html;charset=UTF-8' , cache: fa

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