button-example-on-receipt-page.js

//This is a small script to create a call to action button on a Chargify receipt page,
//where the link has a dymanic subdomain, based on a custom field value.
//This script is meant solely as a *starting point*. You can edit the script as needed.

//define the subdomain, by reading the custom field value
var subdomain = $("body > div.wrapper > div.success-receipt > div.success-receipt__items > dl:nth-child(4) > dd").text();

//define the button and the button's link
var button = '<a href="https://' + subdomain + '.example.com"><button name="button" class="form__button form__button--primary button--block" id="call_to_action">Click to go to your subdomain</button></a>';

//insert the button on the page
$(button).insertBefore(".success-receipt__heading");