### Initialize and start or resume the session

Source: https://proctor-test1.youtestme.com/sdk/doc/Supervisor.html

Examples of starting a session, either by starting an already initialized session or in self-registration mode, or by initializing and starting with specific parameters like provider and token.

```javascript
// start the already initialized session or self-registration mode
supervisor.start();
// initialize and start the session with parameters
supervisor.start({ provider: 'jwt', token: '...' });
```

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

### Supervisor On Method Examples

Source: https://proctor-test1.youtestme.com/sdk/doc/Supervisor.html

Examples showing how to add event handlers for single or multiple events.

```javascript
// event handler
var handler = function() {
  supervisor.logout({ redirect: true });
};
// subscribe to a single event
supervisor.on('stop', handler);
// subscribe to multiple events
supervisor.on(['stop', 'fail'], handler);
```

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

### Supervisor Constructor Example

Source: https://proctor-test1.youtestme.com/sdk/doc/Supervisor.html

Example of how to instantiate the Supervisor class with a server URL.

```javascript
var supervisor = new Supervisor({ url: 'https://your-proctoring-server' });
```

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

### Self-registration with Supervisor SDK

Source: https://proctor-test1.youtestme.com/sdk/doc/index.html

This example demonstrates how to initialize and start a proctoring session using the Supervisor SDK with self-registration. It includes setting up event handlers for 'stop' and 'fail' events, and logging out with redirection.

```html
<script src="https://your-proctoring-server/sdk/supervisor.js"></script>
<script>
  // create Supervisor instance
  var supervisor = new Supervisor({
    // URL of your proctoring server
    url: 'https://your-proctoring-server'
  });
  // add a handler for the "stop" and "fail" events
  supervisor.on(['stop', 'fail'], function () {
    // log out of the session with redirection to referrer page
    supervisor.logout({ redirect: true });
  });
  // start the session in self-registration mode
  supervisor.start();
</script>
```

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

### Initialize and start the session

Source: https://proctor-test1.youtestme.com/sdk/doc/tutorial-jwt-payload.html

This snippet demonstrates how to initialize and start a session with a provider and token.

```javascript
var provider = "";
var token = "";
supervisor.start({ provider, token });
```

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

### Integration Provider Setup

Source: https://proctor-test1.youtestme.com/sdk/doc/tutorial-tracking-metrics.html

Configuration for setting up an integration provider using webhooks, specifying strategy, profile, and registration details including metrics and weights.

```json
{
  "strategy": "plain",
  "profile": {
    "username": "payload.username"
  },
  "register": {
    "identifier": "payload.identifier",
    "subject": "payload.subject",
    "timeout": "payload.timeout",
    "metrics": "payload.metrics",
    "addons": "payload.addons",
    "weights": "payload.weights",
    "threshold": "payload.threshold"
  }
}
```

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

### JWT payload authorization with Supervisor SDK

Source: https://proctor-test1.youtestme.com/sdk/doc/index.html

This example shows how to use the Supervisor SDK with JWT authorization. It includes creating a Supervisor instance, setting up event handlers for 'start', 'stop', and 'fail', and initiating the session with a JWT token obtained from a backend API.

```html
<script src="https://your-proctoring-server/sdk/supervisor.js"></script>
<script>
  // create Supervisor instance
  var supervisor = new Supervisor({
    url: 'https://your-proctoring-server',
  });
  // add a handler for the "start" event
  supervisor.on('start', function () {
    // start testing in the e-learning system here
  });
  // add a handler for the "stop" and "fail" events
  supervisor.on(['stop', 'fail'], function () {
    // log out of the session with redirection to home page
    supervisor.logout({ redirect: '/' });
  });
  // initialize the session and start it
  supervisor.start({
    // set your provider name
    provider: 'jwt',
    // get JWT string from your server
    token: fetch('/api/token').then(function (response) {
      if (response.ok) return response.text();
      else throw Error('Failed to get JWT');
    })
  });
  // stop the session after testing in the e-learning system is over,
  // the timeout function is used here as an example
  setTimeout(function () {
    // stop the session
    supervisor.stop();
  }, 5 * 60 * 1000); // 5 minutes
</script>
```

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

### Supervisor Init Method Example

Source: https://proctor-test1.youtestme.com/sdk/doc/Supervisor.html

Example of initializing a session using a JWT token obtained from a server.

```javascript
supervisor.init({
  // set your provider name
  provider: 'jwt',
  // get JWT string from your server
  token: fetch('/api/token').then(function (response) {
    if (response.ok) return response.text();
    else throw Error('Failed to get JWT');
  })
});
```

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

### Supervisor Once Method Example

Source: https://proctor-test1.youtestme.com/sdk/doc/Supervisor.html

Example of adding an event handler that will be executed only once.

```javascript
// event handler
var handler = function() {
  // event occurred
};
// subscribe to an event
supervisor.once('start', handler);
```

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

### Supervisor Logout Method Example

Source: https://proctor-test1.youtestme.com/sdk/doc/Supervisor.html

Example of logging out from the session, with an option to redirect afterwards.

```javascript
supervisor.logout({ redirect: true });
```

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

### Supervisor Off Method Examples

Source: https://proctor-test1.youtestme.com/sdk/doc/Supervisor.html

Examples demonstrating how to remove event handlers for single or multiple events.

```javascript
// unsubscribe from a single event
supervisor.off('stop', handler);
// unsubscribe from multiple events
supervisor.off(['stop', 'fail'], handler);
```

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

### Supervisor Check Method Examples

Source: https://proctor-test1.youtestme.com/sdk/doc/Supervisor.html

Examples demonstrating how to use the check method to verify equipment, with options to check specific components.

```javascript
// check all equipment
supervisor.check();
// check only the camera
supervisor.check({ camera: true });
// check the camera and microphone
supervisor.check({ camera: true, microphone: true });
```

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

### Supervisor Lookup Method Example

Source: https://proctor-test1.youtestme.com/sdk/doc/Supervisor.html

Example of using the lookup method to retrieve specific session fields.

```javascript
supervisor.lookup('identifier', 'username', 'subject', 'duration');
```

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

### Supervisor Close Method Example

Source: https://proctor-test1.youtestme.com/sdk/doc/Supervisor.html

Example of how to close the current session without logging out, allowing for continuation later.

```javascript
supervisor.close();
```

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

### Synchronize the session state by token

Source: https://proctor-test1.youtestme.com/sdk/doc/Supervisor.html

Example of synchronizing the session state using a provided session token.

```javascript
supervisor.sync({ token: 'SESSION_TOKEN' });
```

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

### Update user profile and upload face photo

Source: https://proctor-test1.youtestme.com/sdk/doc/Supervisor.html

Examples of updating a user's profile, including changing their nickname and UI language, and uploading a face photo using a local path or a fetch blob.

```javascript
// change user's full name and UI language
supervisor.profile({ nickname: 'John Doe', lang: 'en' });
// upload user's face photo
supervisor.profile({ face: '/path/to/face.jpg' });
// or the same using fetch()
supervisor.profile({ face: fetch('/path/to/face.jpg').then(res => res.blob()) });
```

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

### Create Supervisor instance

Source: https://proctor-test1.youtestme.com/sdk/doc/tutorial-jwt-payload.html

This snippet shows how to create a Supervisor instance with a given URL.

```javascript
var url = "";
var supervisor = new Supervisor({ url });
```

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

### Self-registration with data-attributes

Source: https://proctor-test1.youtestme.com/sdk/doc/index.html

An alternative method for self-registration using data-attributes directly on the script tag to initialize the Supervisor SDK.

```html
<script src="https://your-proctoring-server/sdk/supervisor.js" data-supervisor="init"></script>
```

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

### Stop the session and log out

Source: https://proctor-test1.youtestme.com/sdk/doc/tutorial-jwt-payload.html

This snippet shows how to stop the session and log out.

```javascript
supervisor.stop();
```

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