FWIW, the ASP.Net function Page.RegisterStartupScript places the registered script at the bottom of the page, after all controls. That seems like a logical place to do it since, as you note, the JS ...

There is no direct way of binding angular to elements onload event as commonly the HTML elements onload="" attribute looks into the JavaScripts global name space (window.*) which is a big no-no. It ...

instead of just: onload="this.onload=handleClientLoad()" Is the onload attribute the common practice to invoke a function after an async script has loaded? Weirdly I cannot find a reference of onload ...

If you are in a controlled environment and you know nothing else is going to be setting the onload event, you can register (Page.RegisterStartupScript) a script that will both set the body.onload ...