ajax.min.js

var ajax=function(f,e,b,h,g,c){Object(b)===b?e+="?"+Object.keys(b).map(function(a){return encodeURIComponent(a)+"="+encodeURIComponent(b[a])}).join("&"):b=new FormData(document.querySelector(b));var d=new XMLHttpRequest;c=document.querySelector(c);null!==c&&(d.upload.onprogress=function(a){a.lengthComputable&&(c.value=a.loaded/a.total*100,c.textContent=c.value)});d.onload=function(a){199<this.status&&400>this.status?h(this):g(this)};d.onerror=function(a){g(a)};d.open(f,e,!0);d.send("POST"===f?b:null)};