@nodescript/pointer
v1.8.0
Published
Simple Object Get/Set
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620
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NodeScript Pointer
Simple library for getting and setting object values via JSON Pointer or dot-delimited formats.
Highlights
- 🔥 Zero dependencies
- 💻 Works in browser
- 🗜 Tidy and compact, only ~500 bytes minified uncompressed
- ⚡️ Blazing fast
Usage
import * as pointer from '@nodescript/pointer';
const object = {
foo: {
items: [
{ bar: 'one' },
{ bar: 'two' },
{ bar: 'three' },
]
}
};
// If pointer starts with /, then it's interpreted
// as RFC6901 compliant JSON Pointer
pointer.get(object, '/foo/items/1/bar'); // 'two'
// Otherwise it's a dot-delimited path
pointer.get(object, 'foo.items.0'); // { bar: 'one' }
// Set modifies the object, creating additional objects and arrays as needed
const newObj = {}
pointer.set(newObj, 'foo.items.0.bar', '123');
// newObj is now { foo: { items: [{ bar: '123' }] } }
Spec
NodeScript Pointer aims to implement all the features from RFC6901 whilst also extending it to provide the following features:
Dot-delimited paths:
get({ foo: { bar: { baz: 123 }}}, 'foo.bar.baz') // 123
Wildcard syntax to access array content:
// Single level get({ users: [ { name: 'Joe' }, { name: 'Jane' }, ] }, 'users.*.name'); // ['Joe', 'Jane'] // Multiple levels get({ items: [ { tags: [{ value: 1 }, { value: 2 }], }, { tags: [{ value: 3 }], }, ] }, 'items.*.tags.*.value'); // [ [ 1, 2 ], [ 3 ] ]
Push values into array:
const obj = {}; set(obj, '/items/-', 'foo'); // { items: ['foo' ] }