Voice JavaScript SDK quickstart

The Twilio CLI tool lets you manage your Twilio resources from your command line utility.

To create and deploy Twilio Functions from the command line, install the Twilio CLI serverless plugin.

twilio plugins:install @twilio-labs/plugin-serverless

1. To create your app, run the following Twilio CLI command.
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   twilio serverless:init quickstart-voice-javascript-sdk --template="voice-javascript-sdk"

2. Change directories with the following command:
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   cd quickstart-voice-javascript-sdk

3. Open the .env file in a code editor. The file includes this line: ADMIN_PASSWORD=default.
4. Replace default with a unique password that's hard to guess.
5. Save the .env file.
6. Deploy your application with the following Twilio CLI command.
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   twilio serverless:deploy

   This command creates a Service. Services contain your Functions, Assets, and Environments within Twilio Serverless.
7. When the deployment completes, the terminal displays a response with the following.
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   1
   Deployment Details
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   Domain: quickstart-voice-javascript-sdk-6210-dev.twil.io

   Make a note of your deployment domain (for example, quickstart-voice-javascript-sdk-6210-dev.twil.io).

1. Open a web browser to https://{DEPLOYMENT_DOMAIN}/admin/index.html.
   Replace {DEPLOYMENT_DOMAIN} with your deployment domain.
2. Enter the password that you added to the .env file in the Password box.
3. Click Let me in.
4. Click Initialize your application for your environment.

1. Under Environmental Checks, click the running application link.
2. Click Start up the Device and wait for the Call button to appear.
3. Under Make a Call, enter your mobile phone number in the box.
4. Click Call.
5. If your web browser prompts you, allow the website to use your microphone.
6. Your phone will ring with a call from your Twilio number.

Get a deeper understanding of the Voice JavaScript SDK by taking the following steps:

• Learn about how your app implements the Voice JavaScript SDK by reading the code in the assets/quickstart.js file.
• See our Reference Components for the Voice JavaScript SDK.
• Learn about best practices to follow while building with the Voice JavaScript SDK.