We use the delete when we need to delete the object reference. But is there any way in JS to delete the entire object and all references?

Example:

let obj = {
    a: 3
}
let arr = [obj];
let brr = [obj];

If I'd change the obj items in the arrays would be changed too. Also, I can use delete arr[0] to delete the reference. But I want to delete the obj and I want the items in the arrays to be deleted too.

Something like:

// Before: 
let obj = {
   a: 3
}
let arr = [obj];
let brr = [obj];
arr.length==1 // true
brr.length==1 // true
// Deleting:
delete(obj)
// After:
arr.length==0 // true
brr.length==0 // true