Add an 'async' attribute to a JS include tag in asp.net web forms

Question

I saw how it can be done in MVC, but for a specific project I'm using Web-Forms.

I have

<asp:PlaceHolder ID="PlaceHolder1" runat="server">
    <%: System.Web.Optimization.Scripts.Render("~/file.js") %>
</asp:PlaceHolder>

which generates the html:

<script src="/file.js?v=5jui8vHEj5_iAkaGiAccPPb2LcsdK1jQ1"></script>

I wish to add the sync attribute to the above tag.

I'd appreciate some guidance. Thanks.

afzalulh · Accepted Answer · 2013-08-30 03:35:30Z

5

You can use RenderFormat to achieve this:

 <%: System.Web.Optimization.Scripts.RenderFormat ("<script src='{0}' async ></script>", "~/file.js") %>

Renders as: <script src="/file.js" async=""></script>

answered Aug 30, 2013 at 3:35

afzalulh

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1 Comment

Thanks. I couldnt find RenderFormat until I realized it's only available in v. 1.1.0 of Web.Optimization

Adhemar · Accepted Answer · 2014-03-20 20:20:00Z

0

This method would should the magic:

 <script src='<%: System.Web.Optimization.Scripts.Render("~/file.js") %>' async> </script>

I extract from:

answered Mar 20, 2014 at 20:20

Adhemar

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