Channelize.io allows you to embed user-to-user chat into your application by API and SDKs in the easiest way.

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npm install channelize-chat

You can find out JavaScript SDK documentation here.

First you need to install channelize-chat via NPM. Then you can import like this:

import { Channelize } from 'channelize-chat';
var channelize = new Channelize.client({publicKey: YOUR_PUBLIC_KEY});
// do something...