Firebase Database Rules read problems

i have problems with read permission. It will be helpfull if someone help me.

Note: the authentification work the user is loged...

Write permissions work but read permissions are denied.

I have this code:

{
  "rules": {
      "user":{
            "$uid":{
                    ".read":  "auth.uid==$uid", // i try with ===
                    ".write": "auth.uid==$uid" //  i try with ===
                   }
                 }
            }
}

Write permissions work but read permissions are denied.

This is the javascript code:

var userRef= db.ref().child("user/"+id);

userRef.on('child_added', data=>{
console.log(data.val());
});

userRef.on('child_changed', data=>{
console.log(data.val());
});

userRef.on('child_removed', data=>{
console.log(data.val());
});

function insertUser(){

 db.ref("user/"+id).set({
     email:email,
     name:name
 });
}

I also try with:

This make me a error on JavaScript
var userRef= db.ref("user").child(id);

I put ".read": true, but nothing happen yet!

Thanks!