### Install Dependencies

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Ensure all project dependencies are installed.

```bash
yarn
```

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

### Install and Use Node.js Version (Windows)

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Use nvm-windows to install and switch to the recommended Node.js LTS version for development.

```bash
nvm install 20
nvm use 20
```

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

### Install and Use Node.js Version (macOS/Linux)

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Use nvm to install and switch to the recommended Node.js LTS version for development.

```bash
nvm install
nvm use
```

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

### Build ml5.js Library for Production

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Install dependencies and build a production-ready version of the ml5.js library.

```bash
yarn
yarn run build
```

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

### User Options Object Example

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

An example of a `userObject` used to configure model detection, such as setting `maxHands` and `modelType` for the `handpose` model.

```javascript
const optionsObject = {
  maxHands: 4,
  modelType: full,
};
```

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

### Include ml5.js Version 0.6.1

Source: https://github.com/ml5js/ml5-next-gen/blob/main/README.md

Example of including a specific version (0.6.1) of ml5.js.

```html
<script src="https://unpkg.com/ml5@0.6.1/dist/ml5.min.js"></script>
```

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

### Enable Corepack and Install Dependencies

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Enable Corepack to manage package managers and install project dependencies using Yarn.

```bash
corepack enable
yarn
yarn start
```

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

### Build Project

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Compile the project. Wait for the build process to complete before proceeding.

```bash
yarn run build
```

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

### Configure p5 Web Editor Upload

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Create a .env file with your p5 web editor username and password to enable sketch uploading.

```dotenv
P5_USERNAME=<p5 web editor username here>
P5_PASSWORD=<p5 web editor password here>
```

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

### Run Unit Tests

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Execute the project's unit tests. Currently, the test suite is limited but expected to improve.

```bash
yarn test
```

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

### Upload p5 Web Editor Sketches

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Run this command to update existing sketches or create new ones on the p5 web editor based on local directory names.

```bash
yarn run upload-examples
```

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

### Checkout and Pull Main Branch

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Switch to the main branch and ensure it is up to date before making a release.

```bash
git checkout main
git pull
```

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

### Format All JavaScript Files

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Run this command to format all JavaScript files in the repository using Yarn and Prettier.

```bash
yarn run format
```

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

### Instantiate ml5.js Models

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Use factory functions like `ml5.<modelName>()` to instantiate ml5.js models. These functions support p5.js's `preload()` and the callback interface, returning an unready instance synchronously.

```javascript
let bodyPose = ml5.bodyPose("BlazePose");
let neuralNetwork = ml5.neuralNetwork();
```

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

### Unpkg URL for New Release

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

The URL to access the newly published package on unpkg. Replace `<version>` with the SemVer number set in step 1.

```bash
https://unpkg.com/ml5@<version>/dist/ml5.js
```

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

### Login to npm

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Log in to your npm account that has write access to the ml5 package. Authentication may redirect to a browser.

```bash
npm login
```

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

### Publish npm Package

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Publish the ml5 package to npm. Authentication may redirect to a browser.

```bash
npm publish --access public
```

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

### Format Specific File with Prettier

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Use npx and Prettier to format a specific file via the command line.

```bash
npx prettier --write path/to/file
```

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

### Include Latest ml5.js Version

Source: https://github.com/ml5js/ml5-next-gen/blob/main/README.md

Add this script tag to your HTML's head to fetch the latest 1.x version of ml5.js.

```html
<script src="https://unpkg.com/ml5@1/dist/ml5.js"></script>
```

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

### Add New Contributor

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Use this command to initiate the process of adding a new contributor. Follow the terminal prompts to update README.md and .all-contributorsrc.

```bash
yarn all-contributors add
```

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

### Filter User Options with `handleOptions`

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

The `handleOptions` utility function filters user-defined options against a defined 'mold' object, returning a validated object and logging warnings for any invalid options.

```javascript
const filteredOptions = handleOptions(userObject, moldObject);
```

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

### Update README Version

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Run this command to update the version number in README.md after changing the SemVer in package.json.

```bash
yarn run update-readme
```

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

### Handle Invalid Options with Warnings

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

ml5.js provides friendly warnings for invalid parameters or options, proceeding with default values when possible. This ensures robustness even with incorrect user input.

```javascript
let bodyPose = ml5.bodyPose({ modelType: "foo" });
// Console:
// 🟪ml5.js warns: The 'modelType' option for bodyPose has to be set to 'lite', 'full', or 'heavy', but it is being set to 'foo' instead.
// 
// ml5.js is using default value of 'full'.
```

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

### Flexible Parameter Order

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

ml5.js functions allow parameters to be passed in any order when possible, enhancing usability and reducing the need to memorize specific argument sequences.

```javascript
let bodyPose = ml5.bodyPose("blazepose", { modelType: "full" });
```

```javascript
let bodyPose = ml5.bodyPose({ modelType: "full" }, "blazepose");
```

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

### Case-Insensitive Model Name and Options

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Model names and configuration options are matched case-insensitively. This allows for flexibility when specifying model types or other settings.

```javascript
let bodyPose = ml5.bodyPose("BlazePose", { modelType: "Full" });
```

```javascript
let bodyPose = ml5.bodyPose("blazepose", { modelType: "full" });
```

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

### Include Specific ml5.js Version

Source: https://github.com/ml5js/ml5-next-gen/blob/main/README.md

Use this script tag to include a specific version of ml5.js by replacing '<version>' with the desired version number.

```html
<script src="https://unpkg.com/ml5@<version>/dist/ml5.min.js"></script>
```

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

### Callback Interface for Asynchronous Functions

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Asynchronous ml5.js functions should utilize the callback interface, following the `callback(result, error)` pattern. While promise/async await is considered, the callback interface is currently the officially supported method.

```javascript
// Example of callback pattern (not directly shown in source, but implied by guidelines)
```

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

### Define Rule in moldObject

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

Defines rules for filtering options in a moldObject. Specifies types, defaults, and optional constraints like min/max for numbers and enums for specific values.

```javascript
const mold = {
  runtime: {
    type: "enum",
    enums: ["mediapipe", "tfjs"],
    default: "mediapipe",
  },
  maxHands: {
    type: "number",
    min: 1,
    default: (filteredObject) => filteredObject.runtime === "mediapipe" ? 4 : 2;
  },
};

```

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

### Mold Object Definition for Option Validation

Source: https://github.com/ml5js/ml5-next-gen/blob/main/CONTRIBUTING.md

A 'mold' object defines the rules for filtering user options, including data types, minimum/maximum values, allowed enumerations, and default values. This ensures options conform to expected formats.

```javascript
const mold = {
  maxHands: {
    type: "number",
    min: 1,
    default: 2,
  },
  runtime: {
    type: "enum",
    enums: ["mediapipe", "tfjs"],
    default: "mediapipe",
  },
  modelType: {
    type: "enum",
    enums: ["lite", "full"],
    default: "full",
  },
};
```

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