safe-object-proxy

Safe property access for JavaScript objects using Proxy Object.

Requirement

Proxy Object (Latest Chrome and Firefox support it!)

Example

import SafeObject from 'safe-object-proxy';

const so = SafeObject({
  foo: 'hello',
  bar: {
    baz: true
  },
  test: [0, 1, 2]
});

so.foo(); // 'hello'
so.bar.baz(); // true
so.test[1](); // 1
so.throws.no.error.property.not.exists(); // undefined

so.bar.baz = false; // You can update properties
so.bar.bar.bar = 'Not updated'; // Do nothing if you try to update the property not exists

// pattern match whether the property is exist or not
so.foo(
  (val) => val + ' world',
  () => 'Nothing'
); // 'hello world'

so.foofoo(
  (val) => 'This is never called',
  () => 'Nothing'
); // 'Nothing'

Use Case

It will be useful to use for untrusted data like the response data of an Ajax request.

fetch('/api/somthing')
  .then(res => res.json)
  .then(json => SafeObject(json))
  .then(data => {
    console.log(data.user.media.uploadedImages[0]());
  });

License

MIT