safer-object

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Flattened objects with non configurable, and non writable fields (i.e. to freeze prototypes).

const obj = saferObject({
  __proto__: {
    name: 'shadowed',
    parent: 'super'
  },
  name: 'test'
});

obj.name = 'nope';
obj.parent = {nope: true};

console.assert(obj.name === 'test');
console.assert(obj.parent === 'super');
console.assert(obj.hasOwnProperty('parent'));
console.assert(obj.hasOwnProperty('hasOwnProperty'));