Embed for Customers in pure JavaScript, no .NET

My company needs to embed a PowerBI report in an IFrame in a third-party collaboration product (HighQ Collaborate). It will be accessed by internal and external users, who are already authenticated to the third-party site. The third-party collaboration product has an HTML/JavaScript editor but does not support custom .NET development.

In a separate project, I have already embedded a Power BI report in a custom application using the instructions at https://docs.microsoft.com/en-us/power-bi/developer/embed-sample-for-customers. This is working great. However, this is not going to work for the current requirement because the requirement is to embed the Power BI report in a web page using the HTML editor provided in the third-party tool.

Is it possible to embed a Power BI report using pure JavaScript, no .NET code?