The Google Tag Manager Sandboxed API IntelliSense package developed by the Stape team is a handy solution for developers building GTM custom templates. It provides autocompletion for Google Tag Manager APIs directly in your code editor, which helps you write code faster and more accurately.
The package features hover documentation for the APIs, which gives you information about what each function does. As well as code autocompletion.
These features help you build custom templates faster and prevent errors.