Implementation without writing a line of code.
If you want to implement the TestFreaks widget without adding placeholders, TestFreaks can provide you with implementation instructions which only contain a single piece of javascript code. This code will first insert the placeholders, identify the product from the URL on which it loads, and then load the normal Hosted UI.
This code can be loaded through Google Tag Manager. It will be inserted as a new Custom HTML tag. This is how you add such a tag:
<script>
HTML tags that you received in the instructions. It may be something like this
<script async src="https://js.testfreaks.com/onpage/YOUR-CLIENT-ID/head.js">
</script>
(You do not need to support document.write()
.)