SP is undefined in sharepoint hosted app client Webpart

Question

Hello All,
For a client web part in sharepoint hosted app, I am getting the following error
"SP is undefined".
My code is bel0w
   <script
 type="text/javascript"
 src="//ajax.aspnetcdn.com/ajax/4.0/1/MicrosoftAjax.js">
</script>
    <script type="text/javascript" src="../Scripts/jquery-1.9.1.min.js"></script>
     <script  type="text/javascript" src="/_layouts/sp.core.js"></script>
    <script type="text/javascript" src="/_layouts/15/sp.runtime.js"></script>
        <script type="text/javascript" src="/_layouts/15/sp.js"></script>
    <script type="text/javascript">
        'use strict';
        $(document).ready(function () {
                    ExecuteOrDelayUntilScriptLoaded(loadConstants, "sp.js");
                var  clientContext = SP.ClientContext.get_current();
               var  web = clientContext.get_web();
</script>     ....
I am getting the error ExecuteOrDelayUntilScriptLoaded is undefied. This script is in client Web part
Any help is appreciated.
Vishnu

Answer 1

Thanks for the reply Geetanjali.
var  clientContext = SP.ClientContext.get_current();
 var  web = clientContext.get_web();
These two lines of code is supposed to be inside "loadConstants" method.
After changing the code as below, I am able to get SPClientContext and SPWeb.Also, host and appweb url as well
<script
type="text/javascript"
src="../Scripts/jquery-1.6.2.min.js"></script>
 <script
type="text/javascript"
src="//ajax.aspnetcdn.com/ajax/4.0/1/MicrosoftAjax.js"></script>
 <script
type="text/javascript"
src="../Scripts/App.js"></script>
$(document).ready(
    function () {
var spHostUrl = decodeURIComponent(getQueryStringParameter('SPHostUrl'));
      var appWebUrl = decodeURIComponent(getQueryStringParameter('SPAppWebUrl'));
var layoutsRoot = spHostUrl + '/_layouts/15/';
        $.getScript(layoutsRoot +
"SP.Runtime.js",
function () {
            $.getScript(layoutsRoot +
"SP.js", loadConstants);
function loadConstants() {
            context =
new SP.ClientContext.get_current();
            web = context.get_web();
Thanks
Vishnu
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