javascript - ajax request works in firefox, does not work in chrome -

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function ajx(url) {    var xhri = xhrrequest('xml');   var ajxout = '';   var out = '';    xhr[xhri].open('get', url, true);   xhr[xhri].setrequestheader('content-type', 'application/x-www-form-urlencoded; charset='+document.characterset);    xhr[xhri].onreadystatechange = function() {         console.log(xhr[xhri].readystate);      if (xhr[xhri].readystate == 4 && (xhr[xhri].status == 200 || xhr[xhri].status == 205)) {       dosomething();     }   }

an ajax call function leads different result in chrome , firefox: in firefox, dosomething called, because onreadystatechange invoked several times , delivers readystate==4 in end. in chrome, however, onreadystatechange invoked once , logs readystate==0. how can be?


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