How to confirm whether the JS tracking script installed on the customer's website is effective?

Question

We operate saas analytics applications similar to hotjar and googleanalytics. Customers need to install our javascript code on their website for us to track. How do we verify that this script was successfully installed and loaded on their website? (We know the domain name) The current method is to call an API from the script when it loads, the second method is to crawl the page to verify that the script exists. If the script loads successfully, it will go through an API post request. However, if the script is used on any test site

P粉099145710 · Answer

Based on preliminary observations, I will take the following steps:

Write a script that parses the page and checks if the script is added to the header.
Check if the script to be loaded is in the footer and run when the page loads.
To avoid false positives, use a unique identifier on the page, which is not used during development. For example, get the location.host variable from the script and pass it to the analysis tool for verification.