I want to use appscript htmlservice along with appscript, The html service seems to work but the visualization do not work. Here is the code for reference. Code.GS :
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HtmlService uses Caja to filter the unsafe Javascript, CSS and html from your HTML page and then it renders the filetered content to the browser. As I tested your code at Caja playground, It shows same behavior, so this is the issue with Caja, not Htmlservice. You may test your Html file at Caja Payground
Steps to test your HTML file
You may report this issue in Caja issue Tracker