optional-chaining

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[npm-url]: https://npmjs.org/package/optional-chaining
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[download-url]: https://npmjs.org/package/optional-chaining
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[coverage-url]: https://coveralls.io/github/int64ago/optional-chaining

Partial implementation for Optional Chaining in ES5

API

``js
var chain: (sourceObject: object, propertyString: string, defaultValue: any) => any
`

Examples

npm i optional-chaining -S

`js
var chain = require('optional-chaining');

var testObj = {
code: 200,
data: {
list: [
{ id: 1, name: 'name1' },
{ id: 2, name: 'name2' }
],
page: {
current: 1,
total: 200
}
}
};

console.log(chain(testObj, '.code')); // 200
console.log(chain(testObj, '.data.page.current')); // 1
console.log(chain(testObj, '.data.list[0].id')); // 1
console.log(chain(testObj, '.wrong.path')); // undefined
console.log(chain(testObj, '.wrong.path', 666)); // 666
``

License

MIT