downloadFile(url,filename) {
const element =document.createElement('a');
element.setAttribute('href',url);
element.setAttribute('download',filename);
element.style.display ='none';
document.body.appendChild(element);
element.click();
document.body.removeChild(element);
},
objectToUrlParams(obj) {
const params =new URLSearchParams();
for (const keyin obj) {
if (obj.hasOwnProperty(key)) {
params.append(key,obj[key]);
}
}
return params.toString();
},
