calling APIs in JavaScript Code extensions

[wheelerbb]

The Heap Tag Vendor Information indicates "For other Heap APIs, use the Javascript Code extension." 

heap.clearEventProperties() is not a natively supported API in the Tealium Heap Tag, an is only available client-side where Heap is running. 

How would I define an extension to call heap.clearEventProperties() at page load?

Thanks!

This integration natively supports some of Heap's Custom APIs including:
heap.track
heap.identify
heap.addUserProperties
heap.addEventProperties
For other Heap APIs, use the Javascript Code extension.