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Showing content from https://github.com/tunnckocore/put-value below:

tunnckoCore/put-value: Update only existing values from an object, works with dot notation paths like `a.b.c` and support deep nesting.

Update only existing values from an object, works with dot notation paths like a.b.c and support deep nesting.

• updates value of key only if key exists
• updates only existing values of obj when object is given to key
• because set-value update values if exist and add if not exist
• returns original object if key is not an object or string
• returns empty object if obj is not an object
• returns modified object otherwise

npm i put-value --save
npm test

For more use-cases see the tests

var put = require('put-value')
var obj = {
  a: {
    foo: 'bar'
  },
  b: {
    bb: 'bbb'
  }
}

put(123) //=> empty object {}
put(obj, {a: {bar: 'baz'}}) //=> original `obj`
put(obj, {a: 'foo'}})
//=> {
//   a: 'foo',
//   b: {
//     bb: 'bbb'
//   }
// }

put(obj, {zzz: 'xxx'}) //=> original `obj`
put(obj, 'foo', 'baz') //=> original `obj`
put(obj, 'foo.bar', 'baz') //=> original `obj`
put(obj, 'a', {foo: 123})
//=> {
//   a: {
//     foo: 123
//   },
//   b: {
//     bb: 'bbb'
//   }
// }

put(obj, 'a.foo', {baz: 'aaa'})
//=> {
//   a: {
//     foo: {
//       baz: 'aaa'
//     }
//   },
//   b: {
//     bb: 'bbb'
//   }
// }

Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
But before doing anything, please read the CONTRIBUTING.md guidelines.

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