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- # dot-prop [](https://travis-ci.org/sindresorhus/dot-prop)
- > Get, set, or delete a property from a nested object using a dot path
- ## Install
- ```
- $ npm install dot-prop
- ```
- ## Usage
- ```js
- const dotProp = require('dot-prop');
- // Getter
- dotProp.get({foo: {bar: 'unicorn'}}, 'foo.bar');
- //=> 'unicorn'
- dotProp.get({foo: {bar: 'a'}}, 'foo.notDefined.deep');
- //=> undefined
- dotProp.get({foo: {bar: 'a'}}, 'foo.notDefined.deep', 'default value');
- //=> 'default value'
- dotProp.get({foo: {'dot.dot': 'unicorn'}}, 'foo.dot\\.dot');
- //=> 'unicorn'
- // Setter
- const object = {foo: {bar: 'a'}};
- dotProp.set(object, 'foo.bar', 'b');
- console.log(object);
- //=> {foo: {bar: 'b'}}
- const foo = dotProp.set({}, 'foo.bar', 'c');
- console.log(foo);
- //=> {foo: {bar: 'c'}}
- dotProp.set(object, 'foo.baz', 'x');
- console.log(object);
- //=> {foo: {bar: 'b', baz: 'x'}}
- // Has
- dotProp.has({foo: {bar: 'unicorn'}}, 'foo.bar');
- //=> true
- // Deleter
- const object = {foo: {bar: 'a'}};
- dotProp.delete(object, 'foo.bar');
- console.log(object);
- //=> {foo: {}}
- object.foo.bar = {x: 'y', y: 'x'};
- dotProp.delete(object, 'foo.bar.x');
- console.log(object);
- //=> {foo: {bar: {y: 'x'}}}
- ```
- ## API
- ### get(object, path, defaultValue?)
- ### set(object, path, value)
- Returns the object.
- ### has(object, path)
- ### delete(object, path)
- Returns a boolean of whether the property existed before being deleted.
- #### object
- Type: `object`
- Object to get, set, or delete the `path` value.
- You are allowed to pass in `undefined` as the object to the `get` and `has` functions.
- #### path
- Type: `string`
- Path of the property in the object, using `.` to separate each nested key.
- Use `\\.` if you have a `.` in the key.
- The following path components are invalid and results in `undefined` being returned: `__proto__`, `prototype`, `constructor`.
- #### value
- Type: `unknown`
- Value to set at `path`.
- #### defaultValue
- Type: `unknown`
- Default value.
- ---
- <div align="center">
- <b>
- <a href="https://tidelift.com/subscription/pkg/npm-dot-prop?utm_source=npm-dot-prop&utm_medium=referral&utm_campaign=readme">Get professional support for this package with a Tidelift subscription</a>
- </b>
- <br>
- <sub>
- Tidelift helps make open source sustainable for maintainers while giving companies<br>assurances about security, maintenance, and licensing for their dependencies.
- </sub>
- </div>
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