Add script tag and run function inside it in runtime

I have a div tag in my view:

<div ng-bind-html="investmentVm.item.embed_code"></div>

And in my controller, I get script tag from database and put it in to model:

this.item.embed_code = this.$sce.trustAsHtml("<script>alert('OK');</script>");

If I put a html tag at the end of embed_code, it can be displayed by ng-bind-html, but script tag does not display.

In the old version of AngularJS we can use ng-bind-html-unsafe to bind a script tag but it has been removed in new version.

How can I add a script tag and run javascript code inside just like:

<script type="text/javascript">(function(n){
     //Do something here
});</script>