Почему jname.status и jcontent.status ==0?

скрипт (данные я получаю нормально):

        let a=document.getElementsByTagName('input')[0];
        let b=document.getElementsByTagName('button')[0];
        let c =document.getElementsByTagName('input')[1];
        console.log(a);
        console.log(b);
        console.log(c);
        b.addEventListener('click',function(){
            if ( a.value !='' && c.value !=''){
                let name=a.value;
                let content=c.value;
                console.log(name);
                console.log(content);
                let jnameurl=JSON.stringify(name);
                let jcontenturl=JSON.stringify(content);
                let jname= new XMLHttpRequest();
                let jcontent = new XMLHttpRequest();
                jname.open('POST',jnameurl,'content.json',false);
                jcontent.open('POST',jcontenturl,'content.json',false);;
                jname.send();
                jcontent.send();
                console.log(jname.status);
                console.log(jcontent.status);
                console.log(jname.statusText);
                console.log(jcontent.statusText);
                console.log(jname.responseText);
                console.log(jcontent.responseText);
            }
            else {
            alert('you not write to input ');
            }
        });