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    <p>There are a couple of things that you could do to resolve this.</p> <p>Firstly, you could add your required dependency to the <code>define</code> array so you don't need to do an asynchronous require within the constructor of the class.</p> <p>That would look like:</p> <pre><code>define(["dojo/_base/declare", "esri/map", "esri/config", "esri/SpatialReference", "esri/geometry/Extent"], function (declare, Map, config, SpatialReference, Extent) { return declare(null, { action: "pan", activeMeasureTool: "", aerialLayer: "", legendLayers: "", loadedServices: "", popup: "", resizeId: 0, constructor: function () { this.init(); }, init: function () { //custom map requires a proxy to function properly. esri.config.defaults.io.proxyUrl = "../sdc_devdata/proxy.php"; var spatRef = new SpatialReference(2276); var startExtent = new Extent(2481416.32087491, 6963246.42495962, 2501196.36936991, 6980267.92469462, spatRef); var appFullExtent = new Extent(2396699.46935379, 6872369.60195443, 2607745.94404633, 7107335.22319087, spatRef); map = new Map("map", { extent: startExtent, isZoomSlider: true, logo: false, sliderStyle: "large" }); this.attachMapEventHandlers(); this.createLayers(); this.handleLayerVisibilityChange(); } }); }); </code></pre> <p>OR you could save the current scope of <code>this</code> to something in the closure when doing the require</p> <pre><code>init: function () { var that = this; require(["esri/map", "esri/config", "esri/SpatialReference", "esri/geometry/Extent"], function (Map, config, SpatialReference, Extent) { //custom map requires a proxy to function properly. esri.config.defaults.io.proxyUrl = "../sdc_devdata/proxy.php"; var spatRef = new SpatialReference(2276); var startExtent = new Extent(2481416.32087491, 6963246.42495962, 2501196.36936991, 6980267.92469462, spatRef); var appFullExtent = new Extent(2396699.46935379, 6872369.60195443, 2607745.94404633, 7107335.22319087, spatRef); map = new Map("map", { extent: startExtent, isZoomSlider: true, logo: false, sliderStyle: "large" }); that.attachMapEventHandlers(); that.createLayers(); that.handleLayerVisibilityChange(); }); }, </code></pre> <p>EDIT: your third option would be using lang.hitch, which lets you specify the scope of <code>this</code> in the the callback function. To use it, you would add <code>dojo/_base/lang</code> to you define() dependency list, and wrap the require callback in <code>lang.hitch(this, function(){});</code></p> <pre><code>define(["dojo/_base/declare", "dojo/_base/lang"], function (declare, lang) { return declare(null, { //... init: function () { require(["esri/map", "esri/config", "esri/SpatialReference", "esri/geometry/Extent"], lang.hitch(this, function (Map, config, SpatialReference, Extent) { //this now refers to the instance of the class })); } }); }); </code></pre> <p>I would strongly suggest going with the first option, since it is consistent with the entire use of AMD (declaring what dependencies a module needs before it executes, rather than loading it on the fly).</p>
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    1. PODojo AMD module changes reference of "this"
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    1. COI appreciate your answer. Accepted the first one
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