VAST Client JS

Vast Client JS is a JavaScript library to fetch and parse Digital Video Ad Serving Template (VAST) documents.

This library provides three components:

• A VAST Client to fetch and parse VAST XML resources into JavaScript Objects.
• A VAST Parser to directly parse a VAST XML.
• A VAST Tracker to batch and call tracking URLs.

For the full API documentation go here. For the full Class reference go here

To explore a practical example of how the vast client can be implemented, please visit this link.

Complies with the VAST 4.3 specification provided by the Interactive Advertising Bureau (IAB).

Get Started

VAST Client JS is available as an NPM package and can be easily installed with:

npm i @dailymotion/vast-client

Then import the components you need.

VASTClient

If you need to fetch and parse VAST documents, you can use the get method from the VASTClient:

import { VASTClient } from '@dailymotion/vast-client'

const vastClient = new VASTClient();

vastClient.get('https://www.examplevast.com/vast.xml')
  .then(parsedVAST => {
    // Do something with the parsed VAST response
  })
  .catch(err => {
    // Deal with the error
  });

In addition to fetching and parsing a VAST resource, VASTClient provides options to filter a sequence of calls based on count and time of execution, together with the possibility to track URLs using VASTTracker.

If you need to directly parse a VAST XML and also follow any wrappers chain, you can use the parseVAST method from the VASTClient :

import { VASTClient } from '@dailymotion/vast-client'

const vastClient = new VASTClient();

vastClient.parseVAST(vastXml)
  .then(parsedVAST => {
    // Do something with the parsed VAST response
  })
  .catch(err => {
    // Deal with the error
  });

VASTParser

To directly parse a VAST XML you can use the VASTParser: The VASTParser will make no fetching, the final response will only contain the first VAST encountered.

import { VASTParser } from '@dailymotion/vast-client'

const vastParser = new VASTParser();

vastParser.parseVAST(vastXml)
  .then(parsedVAST => {
    // Do something with the parsed VAST response
  })
  .catch(err => {
    // Deal with the error
  });

VASTTracker

To track the execution of an ad, create a VASTTracker instance and use the dedicated methods to calls VAST tracking elements.

import { VASTTracker } from '@dailymotion/vast-client'

const vastTracker = new VASTTracker(vastClient, ad, creative);

// Track an impression for the given ad. Will call any <Impression> URI from the <InLine> and <Wrapper> tracking elements.
vastTracker.trackImpression();

API Documentation

The API documentation is organized by components:

• VASTClient
• VASTParser
• VASTTracker

Changelog and migration guides can be found in the release notes.

Pre-bundled versions

We provide several pre-bundled versions of the client (see dist directory)

Bundlers

A version for js bundlers (like webpack or rollup) is available by default when adding the lib using a package manager (like npm or yarn): vast-client.js or vast-client.min.js [minified].

const import {
  VASTClient,
  VASTParser,
  VASTTracker
} from '@dailymotion/vast-client'

const vastClient = new VASTClient();
const vastParser = new VASTParser();
const vastTracker = new VASTTracker();

Browser script

A pre-bundled version of VAST Client JS is available: vast-client.min.js [minified].

To use it, either host it on your CDN or locally in your project. If you're using a script tag make sure to set the type property to module like below.

your index.html

<script type="module" src="your-main-file.js"></script>

main.js

import {VASTClient, VASTParser, VASTTracker} from "vast-client.min.js"

const vastClient = new VASTClient();
const vastParser = new VASTParser();
const vastTracker = new VASTTracker();

Node

A pre-bundled version for node is available too: vast-client-node.js or vast-client-node.min.js [minified].

// Method 1: From npm
const VAST = require('@dailymotion/vast-client')

// Method 2: For pre-bundled you must copy first the file inside your project
// then you will be able to require it without the need of npm
const VAST = require('your/path/vast-client-node.min.js')

const vastClient = new VAST.VASTClient();
const vastParser = new VAST.VASTParser();
const vastTracker = new VAST.VASTTracker();

Build / Contribute

See CONTRIBUTING