A library to prune a JS object from nulls, recursively. This will leave a compact object with no "empty" sub-objects.

nullPrune is a function (exported with UMD, support for CommonJS, AMD or as a global on window). Given a nested object, it will remove all keys that have null or undefined values. After pruning those values, it will also remove any sub-object that have no keys left.

The operation is destructive, the function will mutate the input object. If that is not desired, clone the input before passing it to the function.

let input = {
  alpha: {
    x: null,
    y: undefined
  },
  beta: false
}

console.log('output:', nullPrune(input))
// output: { beta: false }