API Reference > imodeljs-frontend > Extensions > ExtensionAdmin > register register Method Registers an Extension with the ExtensionAdmin. This method is called by the Extension when it is first loaded. This method verifies that the required versions of the iModel.js shared libraries are loaded. If those requirements are met, then the onLoad and onExecute methods of the Extension will be called (See: Extension). If not, no further action is taken and the Extension is not active. register(extension: Extension): void Parameter Type Description extension Extension a newly instantiated subclass of Extension. Returns - void Defined in core/frontend/src/extension/ExtensionAdmin.ts Line 135 Last Updated: 11 June, 2024