JSON Pointer
============

This is an implementation of RFC-6901 JSON Pointer. JSON Pointer is designed for
referring to data values within a JSON document. It's designed to be URL
friendly so it can be used as a URL fragment that points to a specific part of
the JSON document.

Installation
------------
Includes support for node.js JavaScript (CommonJS and ES Modules), TypeScript,
and browsers.

```bash
npm install @hyperjump/json-pointer
```

Usage
-----

```javascript
const JsonPointer = require("@hyperjump/json-pointer");

const value = {
  "foo": {
    "bar": 42
  }
};

// Construct pointers
const fooPointer = JsonPointer.append(JsonPointer.nil, "foo"); // "/foo"
const fooBarPointer = JsonPointer.append(fooPointer, "bar"); // "/foo/bar"

// Get a value from a pointer
const getFooBar = JsonPointer.get(fooBarPointer);
getFooBar(value); // 42

// Set a value from a pointer
// New value is returned without modifying the original
const setFooBar = JsonPointer.set(fooBarPointer);
setFooBar(value, 33); // { "foo": { "bar": 33 } }

// Assign a value from a pointer
// The original value is changed and no value is returned
const assignFooBar = JsonPointer.assign(fooBarPointer);
assignFooBar(value, 33); // { "foo": { "bar": 33 } }

// Unset a value from a pointer
// New value is returned without modifying the original
const unsetFooBar = JsonPointer.unset(fooBarPointer);
setFooBar(value); // { "foo": {} }

// Delete a value from a pointer
// The original value is changed and no value is returned
const deleteFooBar = JsonPointer.remove(fooBarPointer);
deleteFooBar(value); // { "foo": {} }
```

Contributing
------------

### Tests

Run the tests

```bash
npm test
```

Run the tests with a continuous test runner
```bash
npm test -- --watch
```