Overview

Introduction to Rewardful's JavaScript API

Rewardful's remote script loads asynchronously to make it as performant and reliable as possible. You can use our asynchronous JavaScript API to perform client-side conversion tracking as well as execute functions when Rewardful has initialized.

Add the JavaScript tag + snippet

To add support for our asynchronous JavaScript API, place this code snippet onto every page of your website, ideally in the <head> tag:

<script>(function(w,r){w._rwq=r;w[r]=w[r]||function(){(w[r].q=w[r].q||[]).push(arguments)}})(window,'rewardful');</script>

This code will add a rewardful function to the page, which can be immediately called and passed instructions that Rewardful will execute once loaded. The general format of these method calls is rewardful(methodName, arg1, arg2, arg3, ...)

It's important for this snippet to appear in your HTML before any calls to the rewardful function. To make it simple, we recommend adding it immediately before the script tag that loads the remote Rewardful script from Step #1 in the setup instructions. Your final Step #1 snippet should look something like this:

<script>(function(w,r){w._rwq=r;w[r]=w[r]||function(){(w[r].q=w[r].q||[]).push(arguments)}})(window,'rewardful');</script>
<script async src='https://r.wdfl.co/rw.js' data-rewardful='YOUR-API-KEY'></script>

Remember to replace YOUR-API-KEY with your Rewardful API Key, which can be found on the Company settings page in your Rewardful dashboard.

Client-Side Conversion Tracking

Rewardful's JavaScript API allows you to track conversions with frontend code only — no backend code is required. This can make integrating Rewardful much simpler, and enables you to use Rewardful in scenarios where you're unable to modify backend/server code, such as when using a hosted platform to sell your products.

To track a conversion client-side, use the "convert" function, and pass the customer's email address using the email parameter. This code should appear on your thank-you or receipt page (or whatever page your customers are taken to immediately after purchase).

For example:

<script>
rewardful('convert', { email: '[email protected]' })
</script>

This code will search for the most recently created customer with the email address "[email protected]" in your Stripe account. If the customer exists and the Rewardful cookie is present (i.e. this visitor is a referral), Rewardful with associate the customer with the affiliate.

Note: this code only performs network requests if the current website visitor is a referral. If the visitor arrived on your website through another channel, the convert function does nothing.

Requirements

In order to use Client-Side Conversion Tracking there are a few prerequisites:

  1. Your Stripe account must be connected to Rewardful with read-write permission.

  2. Your platform creates Stripe Customers within your Stripe account when a purchase is made.

  3. You are able to add client-side code snippets to your website & receipt/thank-you page, and access the customer's email address on these pages.

The Stripe customer must have been created within the last 24 hours in order to be tracked with client-side conversion tracking.

Executing code when Rewardful loads

In some cases you might want to execute code once Rewardful has fully loaded and performed any tracking/network requests.

Pass a callback function to the ready handler to have it executed when Rewardful has fully loaded. This function always executes, whether the current visitor is a referral or not. For example:

<script>
rewardful('ready', function() {
console.log('Rewardful Ready!')
});
</script>

If you only want code to run if the current visitor is a referral, you can check the Rewardful.referral property:

<script>
rewardful('ready', function() {
if(Rewardful.referral) {
// The current website visitor is a referral from an affiliate.
}
});
</script>

Calls to rewardful are queued and executed in order once Rewardful has loaded. This means you can queue up multiple functions, and even call rewardful if Rewardful is loaded (which effectively calls the underlying function immediately). For example:

<script>
rewardful('ready', function() {
console.log('This will fire first.')
});
rewardful('ready', function() {
console.log('This will fire second.')
});
rewardful('ready', function() {
console.log('This will fire third.')
});
</script>

Do not run critical code within a ready handler (i.e. checkout code). If Rewardful fails to load for any reason (network issue, adblockers, etc.) then the ready handler will never run and your code will not execute.

If you must place critical code within a ready handler, use defensive programming techniques (such as setTimeout) to ensure your critical code will execute even if Rewardful never loads.

Specify traffic source

It's possible to force the current visitor to be attributed to an affiliate even if the visitor didn't arrive through an affiliate link. This is useful for creating landing pages with friendly URLs for a partner promotion, or for creating URLs that are easier to share verbally (i.e. on podcasts).

<script>
rewardful('source', AFFILIATE_LINK_TOKEN)
</script>

Example: instead of example.com/?via=bond007 you could create a page at example.com/bond and include the snippet below to ensure all visitors to this page get attributed to James Bond:

<script>
rewardful('source', 'bond007')
</script>

It's important to note that this operation overwrites any existing referral for the visitor that's stored in the cookie. Continuing our example above, if the visitor first arrived through example.com/?via=batman but then went on to visit example.com/bond (where the code above is executed) then James Bond would ultimately get credited for the conversion.

Preloading a referral ID

Normally Rewardful will look for the ?via=token query string parameter when attributing a visit to an affiliate. When the via parameter is present and valid, a new referral will be created for the affiliate and the referral ID stored in the cookie as Rewardful.referral.

However, there may be situations where you want to preload a specific referral ID into the cookie. This can be done by adding a ?referral=<UUID> parameter to the URL:

https://www.example.com/pricing?referral=bffa8b94-b25a-45a4-97a0-1c8ecb8018b9

When a user browses to this URL, the existing referral with ID bffa8b94-b25a-45a4-97a0-1c8ecb8018b0 will be loaded into the cookie. (This is actually how Rewardful tracks across different domains).

An example of when this is relevant is when the checkout process is embedded within an iframe. If the parent URL and iframe URL both have a via parameter then two referrals will be created (one for each window) which artificially inflates visitor stats.

In this scenario, the parent window can check for an existing referral ID and pass it to the iframe by adding a referral=<UUID>parameter to the iframe URL before inserting the iframe into the DOM:

rewardful('ready', function() {
const iframe = document.createElement('iframe')
iframe.src = 'https://checkout.example.com'
if(Rewardful.referral) {
iframe.src += `?referral=${Rewardful.referral}`
}
document.appendChild(iframe)
});

This will ensure the iframe is using the same referral ID as the parent window and will prevent double-tracking visitors. If using the approach above to insert your checkout iframe, ensure you have a fallback plan in case Rewardful never loads. See Executing code when Rewardful loads for more information.

Attributes

Because Rewardful loads asynchronously, we recommend accessing these attributes within the rewardful('ready')handler. See Executing code when Rewardful loads for details.

Referral

Rewardful.referral will return the Referral ID of the current visitor if they were referred, for example: "98288128-0d5f-45a9-88b3-ef95b229f798"

If the current visitor was not referred by a Rewardful affiliate, Rewardful.referral will return an empty string: ""

<script>
rewardful('ready', function() {
if(Rewardful.referral) {
console.log('Current referral ID: ', Rewardful.referral);
} else {
console.log('No referral present.');
}
});
</script>

Affiliate

Rewardful.affiliate will return some information about who sent you a referral, for example:

{
id: "b533bfca-7c70-4dec-9691-e136a8d9a26c",
name: "James Bond",
first_name: "James",
last_name: "Bond",
token: "james007"
}

You might want to use this for personalizing your website based on who the affiliate was:

<script>
rewardful('ready', function() {
if(Rewardful.affiliate) {
$('.affiliate-banner').text(
`Hi there, friend of ${Rewardful.affiliate.first_name}!`
).show();
}
});
</script>

Rewardful.affiliate returns false if there is no affiliate, i.e. the current visitor was not referred.

Campaign

Rewardful.campaign will return the ID and name of the campaign the affiliate is associated with:

{
"campaign": {
"id": "1f51675a-646d-4a83-898b-16e0ceeb0373",
"name": "Friends of Acme, Inc."
}
}

Coupon Details

If you've attached a coupon to your campaign, the coupon object will be available through Rewardful.coupon. The attributes correspond directly to the coupon object in Stripe.

For example, a 25% discount that repeats for 12 months might look like:

{
id: "bf-2019",
name: "Black Friday 2019",
duration: "repeating",
duration_in_months: 12,
percent_off: 25,
amount_off: null,
currency: null
}

And a one-time $25 USD discount might look like:

{
id: "save-25",
name: "One-time $25 credit",
duration: "once",
duration_in_months: null,
percent_off: null,
amount_off: 2500,
currency: "usd"
}

We recommend checking for the coupon's existence before attempting to access it's attributes, for example:

<script>
rewardful('ready', function() {
if(Rewardful.coupon) {
showCouponBanner(Rewardful.coupon);
}
});
</script>

Methods

Attaching to forms

On page load Rewardful will automatically inject a hidden input into forms with a data-rewardful attribute. This makes it simple to get the referral ID sent to your server along with the rest of the data from your signup or payment form.

For example, your signup form might look something like this:

<form action="/signup" method="post" data-rewardful="true">
<input type="text" name="name">
<input type="email" name="email">
<button>Sign Up</button>
</form>

If the current visitor came to your site through an affiliate link, Rewardful will detect the data-rewardful attribute and automatically insert a hidden input named referral with the unique click ID (UUID) as the value. For example:

<form action="/signup" method="post" data-rewardful="true">
<input type="text" name="name">
<input type="email" name="email">
<button>Sign Up</button>
<!-- Inserted automatically by Rewardful: -->
<input type="hidden" name="referral" value="78476c40-0137-11eb">
</form>

When the form is submitted, the POST data sent to your server will include the referral parameter, along with the rest of the customer data. You can extract this value ($_POST['referral'] in PHP, params[:referral] in Rails, etc) and add it to the Stripe customer's metadata or save it in your own database for future use.

Manually attaching to forms

If your form is dynamically added to the page (Turbolinks, a single-page app or a modal) you'll need to manually tell Rewardful to attach to these forms after they have been added to the DOM.

To attach to all forms present in the DOM with the data-rewardful attribute, you can call Rewardful.Forms.attach()

document.addEventListener("turbolinks:load", function() {
Rewardful.Forms.attach();
});

If your form appears inside a Bootstrap Modal:

$('#signup-modal').on('shown.bs.modal', function (e) {
Rewardful.Forms.attach();
});

Attaching to specific forms

If you'd like to manually attach the hidden referral input into a specific form, you can do so with Rewardful.Forms.add(formElement), for example:

const signupForm = document.getElementById('signup-form');
Rewardful.Forms.add(signupForm);

This can be useful in circumstances where you cannot easily modify the source code of the form tag (for example, using a CMS or hosted service) and are unable to add the data-rewardful attribute.

Troubleshooting

If you're running into issues with your JavaScript integration it's possible to inspect the data stored in the Rewardful cookie using the Rewardful._cookie attribute.

IMPORTANT: TheRewardful._cookie is for debugging purposes only. This data structure is for may change formats at any time without warning and should not be used for any purpose other than troubleshooting.

Here's an example of the data structure returned by Rewadful._cookie:

{
"id": "c4b3c530-3d7b-4f01-89bf-12ce7cbe1e4b",
"created_at": "2021-01-10T13:27:16.766-07:00",
"affiliate": {
"id": "b533bfca-7c70-4dec-9691-e136a8d9a26c",
"name": "James Bond",
"first_name": "James",
"last_name": "Bond",
"token": "jb007"
},
"campaign": {
"id": "1f51675a-646d-4a83-898b-16e0ceeb0373",
"name": "Friends of Acme, Inc."
},
"coupon": null,
"cookie": {
"domain": "example.com"
}
}

Attribute

Description

id

The UUID of the referral (equivalent toRewardful.referral)

created_at

Timestamp at which this referral was originally created.

affiliate

Equivalent to Rewardful.affiliate

campaign

Equivalent to Rewardful.campaign

coupon

Equivalent to Rewardful.coupon

cookie

Additional metadata about the cookie