Cannot read property 'on' of undefined

المشرف العام

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while clicking on the button on.click event is not fired and getting error "Cannot read property 'on' of undefined",how to solve this issue.

Simple Map html, body, #map { height: 100%; width: 100%; margin: 0; padding: 0; } body { background-color: #FFF; overflow: hidden; font-family: "Trebuchet MS"; } var map,navToolbar;

require(["esri/map", "dojo/dom", "dojo/on", "dijit/form/Button", "dojo/domReady!"], function(Map,dom,on,parser,registry) { map = new Map("map", { basemap: "streets", center: [72, 25.75], zoom: 5 }); //navToolbar = new Navigation(map); //on(navToolbar, "onExtentHistoryChange", extentHistoryChangeHandler); dijit.registry.byId("clickMe").on("click",showMessage); function showMessage(){ alert("Hello") } });

Click Me





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