Hi i'm facing the problem of opening a pdf with file object

i'm getting this error

failed to load pdf document

Reload

here what i have tried:

<iframe id="pdfiframe" src=""><iframe>

document.getElementById('fileinput').addEventListener('change',(event)=>{ 
     const file = event.target.files[0];
     let url = URL.createObjectURL( file );
     document.getElementById('pdfiframe').setAttribute('src',url);
},false);