This is not possible. This thread seems quite old now (in terms of the Arcgis versions that it would apply to). I was curious if we are still unable to create custom Esri builds, as in the case of a product I work on, several additional modules are consistently required on top of those provided in the 3.6 build (such as "esri/nls/jsapi_en-us", "dojox/gfx/svg", "dojo/DeferredList", "esri/toolbars/edit", as well as 33 others). This consistently requires extra network traffic, and slows down the start up of our application. I'd be really interested in creating, either a custom init.js file, or a supplementary file that contains only the extra module that my application Always requires.
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