Error : Cannot read property 'cloneNode' of undefined

Question

I'm trying to add a listener to my Database using Firebase.

const dbRef=firebase.database().ref().child('messages');
dbRef.on('child_added', MS.bringData);

When something is added, I execute bringData which creates a new object called message from the snap object.

export const bringData = (snap) => {
  const message1=new Message(snap.val().objet, snap.val().message, snap.val().etat, snap.val().key);
  message1.creerLigne();
}

Then I call creerLigne() from the class Message, to create the new line and add it to tbody

creerLigne() {
     const arg=[this._objet, this._message, this._etat, this._id];
     const row=document.createElement("tr");
     row.setAttribute('id', this._id);
     const data=document.createElement("td");
     var checkB=document.createElement("input").setAttribute('type', 'checkbox', 'name', 'delete');

     var i=0;
     while(i<arg.length-1) {
         let data1=data.cloneNode();
         let text=document.createTextNode(arg[i]);
         data1.appendChild(text);
         row.appendChild(data1);
         i++;
     }

     data1.appendChild(text);
     row.appendChild(data1);
     row.appendChild(checkB.cloneNode());
     document.body.appendChild('row');
}

but unfortunately I'm getting the following error:

FIREBASE WARNING: Exception was thrown by user callback. TypeError: Cannot read property 'cloneNode' of undefined
    at Message.creerLigne 

Solution

var checkB=document.createElement("input").setAttribute('type', 'checkbox', 'name', 'delete');

should be

var checkB=document.createElement("input");
checkB.setAttribute('type', 'checkbox');
checkB.setAttribute('name', 'delete');

.setAttribute does not return the element, and it only takes two arguments.