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104 lines
1.7 KiB
Markdown
104 lines
1.7 KiB
Markdown
# dot-prop [](https://travis-ci.org/sindresorhus/dot-prop)
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> Get, set, or delete a property from a nested object using a dot path
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## Install
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```
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$ npm install --save dot-prop
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```
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## Usage
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```js
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const dotProp = require('dot-prop');
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// getter
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dotProp.get({foo: {bar: 'unicorn'}}, 'foo.bar');
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//=> 'unicorn'
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dotProp.get({foo: {bar: 'a'}}, 'foo.notDefined.deep');
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//=> undefined
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dotProp.get({foo: {bar: 'a'}}, 'foo.notDefined.deep', 'default value');
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//=> 'default value'
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dotProp.get({foo: {'dot.dot': 'unicorn'}}, 'foo.dot\\.dot');
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//=> 'unicorn'
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// setter
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const obj = {foo: {bar: 'a'}};
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dotProp.set(obj, 'foo.bar', 'b');
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console.log(obj);
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//=> {foo: {bar: 'b'}}
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const foo = dotProp.set({}, 'foo.bar', 'c');
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console.log(foo);
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//=> {foo: {bar: 'c'}}
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dotProp.set(obj, 'foo.baz', 'x');
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console.log(obj);
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//=> {foo: {bar: 'b', baz: 'x'}}
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// has
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dotProp.has({foo: {bar: 'unicorn'}}, 'foo.bar');
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//=> true
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// deleter
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const obj = {foo: {bar: 'a'}};
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dotProp.delete(obj, 'foo.bar');
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console.log(obj);
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//=> {foo: {}}
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obj.foo.bar = {x: 'y', y: 'x'};
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dotProp.delete(obj, 'foo.bar.x');
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console.log(obj);
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//=> {foo: {bar: {y: 'x'}}}
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```
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## API
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### get(obj, path, [defaultValue])
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### set(obj, path, value)
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Returns the object.
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### has(obj, path)
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### delete(obj, path)
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#### obj
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Type: `Object`
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Object to get, set, or delete the `path` value.
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#### path
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Type: `string`
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Path of the property in the object, using `.` to separate each nested key.
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Use `\\.` if you have a `.` in the key.
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#### value
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Type: `any`
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Value to set at `path`.
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#### defaultValue
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Type: `any`
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Default value.
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## License
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MIT © [Sindre Sorhus](https://sindresorhus.com)
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