SharePoint 2013 on demand loading pattern

SharePoint has a JavaScript on-demand loading library, the SP.SOD library (more info on https://msdn.microsoft.com/en-us/library/office/ff410742(v=office.14).aspx). We find the following pattern useful to ensure that a custom JavaScript library called MyCustomLib.js is only loaded once and on demand. So in the pattern below, MyCustomLib.js is only loaded when SP.SOD.executeFunc() is executed.

RegisterSod(MyCustomLib.js’, ‘/sites/ OurTestSite/Style%20Library/Javascript/MyCustomLib.js’);

RegisterSod(AnotherCustomLib.js’, ‘/sites/OurTestSite/Style%20Library/Javascript/AnotherCustomLib.js’);

RegisterSodDep(“MyCustomLib.js”, “SP.js”);

RegisterSodDep(“MyCustomLib.js”, ” AnotherCustomLib.js”);

SP.SOD.executeFunc(MyCustomLib.js’, null, function () { LoisAndClark.CustomApplication.MyCustomLib.init(); });