reactjs - Changing a file object's name in React.js state -

good day! using react , react-dropzone , immutability helper

users can drop cvs files in , list appears file names in input boxes can change filenames if needed.

the filelist set

 ondrop = (acceptedfiles, rejectedfiles, e) => {      this.setstate({          files: acceptedfiles     });  }   

setstate({files: acceptedfiles })

i have inputs onchange wired onchangehandler function.

i encountered error of read-only name on #<file> object , came across advice use update immutability helpers.

so came this

onchangehandler = (event) =>{   let id = event.target.id;    this.setstate(update(this.state.files[id], {name: {$set: event.target.value }}));  } 

however upon editing file name in input produces uncaught typeerror: failed construct 'file': 2 arguments required, 0 present.

i means have no idea how modify update() satisfy file recreation.

or there more suitable approach?

thank if can chime in.