### Install fast-json-patch using npm

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

Instructions for installing the fast-json-patch library using the npm package manager and saving it as a project dependency.

```Shell
npm install fast-json-patch --save
```

--------------------------------

### Install Dependencies Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Installs all project dependencies, including development dependencies, as specified in the package.json file. This is necessary before running tests or building.

```Shell
npm install
```

--------------------------------

### Install TypeScript Compiler Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Installs the TypeScript compiler globally on your system using npm. This is required to build the TypeScript source files.

```Shell
npm install -g typescript
```

--------------------------------

### Applying Single JSON Patch Operation with applyOperation (JavaScript)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

Demonstrates how to use the `applyOperation` function to apply a single JSON Patch operation to a document. The example shows a 'replace' operation changing a property value and illustrates the resulting document state.

```js
var document = { firstName: "Albert", contactDetails: { phoneNumbers: [] } };
var operation = { op: "replace", path: "/firstName", value: "Joachim" };
document = jsonpatch.applyOperation(document, operation).newDocument;
// document == { firstName: "Joachim", contactDetails: { phoneNumbers: [] }}
```

--------------------------------

### Applying Multiple JSON Patch Operations with applyReducer and Array.reduce (JavaScript)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

Illustrates the use of `applyReducer` in conjunction with JavaScript's `Array.reduce` method to apply a sequence of JSON Patch operations (a patch array) to a document. The example includes 'replace' and 'add' operations.

```js
var document = { firstName: "Albert", contactDetails: { phoneNumbers: [ ] } };
var patch = [
  { op:"replace", path: "/firstName", value: "Joachim" },
  { op:"add", path: "/lastName", value: "Wester" },
  { op:"add", path: "/contactDetails/phoneNumbers/0", value: { number: "555-123" } }
];
var updatedDocument = patch.reduce(applyReducer, document);
// updatedDocument == { firstName:"Joachim", lastName:"Wester", contactDetails:{ phoneNumbers[ {number:"555-123"} ] } };
```

--------------------------------

### Publish NPM Package Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Publishes the current version of the package to the npm registry. This makes the new version available for others to install.

```Shell
npm publish
```

--------------------------------

### Run All Node.js Benchmarks Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Executes the main benchmark script defined in package.json, running performance tests for the entire project in Node.js.

```Shell
npm run bench
```

--------------------------------

### Run Build Process Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Executes the build script defined in package.json. This typically involves transpiling, bundling, and minifying the code for distribution.

```Shell
npm run build
```

--------------------------------

### Include fast-json-patch in Browser (Script Tag)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

How to include the fast-json-patch library in a web browser using a standard script tag pointing to the minified distribution file.

```HTML
<script src="dist/fast-json-patch.min.js"></script>
```

--------------------------------

### Run All Node.js Tests Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Executes the main test script defined in package.json, which runs all Node.js unit tests for the project.

```Shell
npm run test
```

--------------------------------

### Generating JSON Patch from Observation (JavaScript)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

Demonstrates how to use `jsonpatch.observe` to track changes on an object and then `jsonpatch.generate` to produce a JSON Patch array representing those changes.

```JavaScript
var document = { firstName: "Joachim", lastName: "Wester", contactDetails: { phoneNumbers: [ { number:"555-123" }] } };
var observer = jsonpatch.observe(document);
document.firstName = "Albert";
document.contactDetails.phoneNumbers[0].number = "123";
document.contactDetails.phoneNumbers.push({ number:"456" });
var patch = jsonpatch.generate(observer);
// patch  == [
//   { op: "replace", path: "/firstName", value: "Albert"},
//   { op: "replace", path: "/contactDetails/phoneNumbers/0/number", value: "123" },
//   { op: "add", path: "/contactDetails/phoneNumbers/1", value: {number:"456"}}
// ];
```

--------------------------------

### Verify NPM Publish Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Checks the distribution tags for the 'fast-json-patch' package on the npm registry to verify that the new version was successfully published.

```Shell
npm view fast-json-patch dist-tags
```

--------------------------------

### Include fast-json-patch in Browser (ES Module)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

How to import the fast-json-patch library as an ECMAScript module in browsers that support ES modules, demonstrating both namespace and named imports.

```JavaScript
import * as jsonpatch from 'fast-json-patch/index.mjs';
  import { applyOperation } from 'fast-json-patch/index.mjs';
```

--------------------------------

### Apply JSON Patch using applyPatch (JavaScript)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

Demonstrates how to use the `applyPatch` function to modify a JavaScript object based on a JSON Patch array, showing the initial document, the patch operations, and the resulting document state.

```JavaScript
var document = { firstName: "Albert", contactDetails: { phoneNumbers: [] } };
var patch = [
  { op: "replace", path: "/firstName", value: "Joachim" },
  { op: "add", path: "/lastName", value: "Wester" },
  { op: "add", path: "/contactDetails/phoneNumbers/0", value: { number: "555-123" }  }
];
document = jsonpatch.applyPatch(document, patch).newDocument;
// document == { firstName: "Joachim", lastName: "Wester", contactDetails: { phoneNumbers: [{number:"555-123"}] } };
```

--------------------------------

### Run TypeScript Compilation Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Executes the TypeScript compilation script defined in the package.json file. This command compiles the TypeScript source files into JavaScript.

```Shell
npm run tsc
```

--------------------------------

### Comparing Documents and Generating JSON Patch (JavaScript)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

Illustrates using `jsonpatch.compare` in JavaScript to find the differences between two distinct object structures and generate a patch to transform the first into the second.

```JavaScript
var documentA = {user: {firstName: "Albert", lastName: "Einstein"}};
var documentB = {user: {firstName: "Albert", lastName: "Collins"}};
var diff = jsonpatch.compare(documentA, documentB);
//diff == [{op: "replace", path: "/user/lastName", value: "Collins"}]
```

--------------------------------

### Run Core Node.js Benchmarks Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Executes the specific benchmark script for the 'core' module in Node.js. Useful for evaluating performance changes in the core functionality.

```Shell
npm run bench-core
```

--------------------------------

### Comparing Documents and Generating Invertible JSON Patch (JavaScript)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

Demonstrates using `jsonpatch.compare` with the `invertible` flag set to `true` to generate a patch that includes `test` operations for the original values in the first document before applying changes.

```JavaScript
var documentA = {user: {firstName: "Albert", lastName: "Einstein"}};
var documentB = {user: {firstName: "Albert", lastName: "Collins"}};
var diff = jsonpatch.compare(documentA, documentB, true);
//diff == [
//   {op: "test", path: "/user/lastName", value: "Einstein"},
//   {op: "replace", path: "/user/lastName", value: "Collins"}
// ];
```

--------------------------------

### Generating Invertible JSON Patch from Observation (JavaScript)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

Shows how to use `jsonpatch.generate` with the optional `invertible` parameter set to `true` to include `test` operations in the generated patch, verifying the original value before applying a change.

```JavaScript
var document = { firstName: "Joachim", lastName: "Wester", contactDetails: { phoneNumbers: [ { number:"555-123" }] } };
var observer = jsonpatch.observe(document);
document.firstName = "Albert";
document.contactDetails.phoneNumbers[0].number = "123";
document.contactDetails.phoneNumbers.push({ number:"456" });
var patch = jsonpatch.generate(observer, true);
// patch  == [
//   { op: "test", path: "/firstName", value: "Joachim"},
//   { op: "replace", path: "/firstName", value: "Albert"},
//   { op: "test", path: "/contactDetails/phoneNumbers/0/number", value: "555-123" },
//   { op: "replace", path: "/contactDetails/phoneNumbers/0/number", value: "123" },
//   { op: "add", path: "/contactDetails/phoneNumbers/1", value: {number:"456"}}
// ];
```

--------------------------------

### Run Core Node.js Tests Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Executes the specific test script for the 'core' module in Node.js. Useful for testing changes only affecting the core functionality.

```Shell
npm run test-core
```

--------------------------------

### Push Git Tags Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Pushes the local git tags (created by 'npm version') to the remote repository. This makes the version tag available remotely.

```Shell
git push --tags
```

--------------------------------

### Run Duplex Node.js Benchmarks Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Executes the specific benchmark script for the 'duplex' module in Node.js. Useful for evaluating performance changes in duplex operations.

```Shell
npm run bench-duplex
```

--------------------------------

### Bump NPM Version Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Updates the package version in package.json and creates a git tag. Replace the placeholder with the desired version increment type (major, minor, patch, etc.).

```Shell
npm version [ major | minor | patch | premajor | preminor | prepatch | prerelease]
```

--------------------------------

### Require fast-json-patch in Node.js (CommonJS)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

How to require the fast-json-patch library as a CommonJS module in standard Node.js environments, showing two common syntax variations.

```JavaScript
const { applyOperation } = require('fast-json-patch');
const applyOperation = require('fast-json-patch').applyOperation;
```

--------------------------------

### Validating JSON Patch Sequence with jsonpatch.validate (JavaScript)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

This snippet demonstrates how to use the `jsonpatch.validate` function to check if a sequence of JSON Patch operations is valid, optionally against a specific document. It shows how to iterate through the results and log errors if validation fails.

```javascript
var obj = {user: {firstName: "Albert"}};
var patches = [{op: "replace", path: "/user/firstName", value: "Albert"}, {op: "replace", path: "/user/lastName", value: "Einstein"}];
var errors = jsonpatch.validate(patches, obj);
if (errors && errors.length === 0) {
 //there are no errors!
} else if (errors) {
  for (var i=0; i < errors.length; i++) {
    if (!errors[i]) {
      console.log("Valid patch at index", i, patches[i]);
    } else {
      console.error("Invalid patch at index", i, errors[i], patches[i]);
    }
  }
}
```

--------------------------------

### Import fast-json-patch in Bundlers (ES Module)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

How to import the fast-json-patch library as an ECMAScript module when using bundlers like Webpack.

```JavaScript
import * as jsonpatch from 'fast-json-patch';
import { applyOperation } from 'fast-json-patch';
```

--------------------------------

### Run Duplex Node.js Tests Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Executes the specific test script for the 'duplex' module in Node.js. Useful for testing changes only affecting duplex operations.

```Shell
npm run test-duplex
```

--------------------------------

### Import fast-json-patch in Node.js (ES Module)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

How to import the fast-json-patch library as an ECMAScript module in Node.js environments supporting ES modules (e.g., Node 12+ with --experimental-modules).

```JavaScript
import * as jsonpatch from 'fast-json-patch/index.mjs';
import { applyOperation } from 'fast-json-patch/index.mjs';
```

--------------------------------

### Comparing Documents and Generating JSON Patch (TypeScript)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

Provides the TypeScript signature for the `jsonpatch.compare` function, which calculates the difference between two JSON-like objects and returns it as a JSON Patch array. It includes relevant type definitions.

```TypeScript
jsonpatch.compare(document1: Jsonable, document2: Jsonable, invertible = false): Operation[]

type JsonableObj = { [key:string]: Jsonable };
type JsonableArr = Jsonable[];
type Jsonable = JsonableArr | JsonableObj | string | number | boolean | null;
```

--------------------------------

### Push Git Commits Shell

Source: https://github.com/starcounter-jack/json-patch/blob/master/CONTRIBUTING.md

Pushes the local commits on the current branch (expected to be 'master' for releases) to the remote repository.

```Shell
git push
```

--------------------------------

### Stopping JSON Patch Observation (TypeScript)

Source: https://github.com/starcounter-jack/json-patch/blob/master/README.md

Provides the TypeScript signature for the `jsonpatch.unobserve` function, which is used to stop tracking changes on a document that was previously observed. It also includes relevant type definitions.

```TypeScript
jsonpatch.unobserve(document: any, observer: Observer): void

type JsonableObj = { [key:string]: Jsonable };
type JsonableArr = Jsonable[];
type Jsonable = JsonableArr | JsonableObj | string | number | boolean | null;
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.