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Sys,loader is undefined

Question

User-389597101 posted

Hi All

I am doing some sample code to understand Sys.loader.registerScript. Here is the code

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script src="http://code.jquery.com/jquery-latest.js" type="text/javascript"></script>

</head>
<body>
    
    <form id="form1" runat="server">
        <asp:ScriptManager runat="server"></asp:ScriptManager>
        <a href="#">Click Me</a>
    </form>
    <script type="text/javascript">
        function execute() {
            alert("hi");
        }
        $(document).ready(
            function () {                
                $("a").click(
                    function () {
                        if (window.Sys && Sys.loader) {
                            Sys.loader.registerScript("MyScript", null, execute);
                            alert("Lazy loading");
                        }
                        else {
                            execute();
                        }
                    });
            });
    </script>
</body>
</html>

But Sys.loader is undefined. Could you please help

Monday, September 3, 2018 12:46 PM

Answers

User-893317190 posted

Hi karang,

You should introduce start.js of microsoft.

Below is my code.

<head runat="server">
    <title></title>
    <script src="../Scripts/jquery-3.3.1.js"></script>
       <script src="http://ajax.microsoft.com/ajax/beta/0910/Start.js" ></script>
</head>

<body>

    <form id="form1" runat="server">
               <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
        
      <a href="#">click</a>
 <script type="text/javascript">
     console.log(Sys.loader)
        function execute() {
            alert("hi");
        }
        $(document).ready(
            function () {                
                $("a").click(
                    function () {
                        if (window.Sys && Sys.loader) {
                            Sys.loader.registerScript("MyScript", null, execute);
                            alert("Lazy loading");
                        }
                        else {
                            execute();
                        }
                    });
            });
    </script>

       
    </form>

   
</body>

Best regards,

Ackerly Xu

Marked as answer by Anonymous Thursday, October 7, 2021 12:00 AM

Tuesday, September 4, 2018 6:14 AM

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