What is the difference between \Bitrix\Main\UI\Extension::load and \CJSCore::Init?

Question

1C-Bitrix

Why are some libraries (like ui.vue) loaded by both methods, and some (like popup) only via \CJSCore::Init

Answer 1

For popup call \Bitrix\Main\UI\Extension::load("main.popup");
For " Extensions ":
Look at the folder /bitrix/js/folder_name/lib_name/
Connect \Bitrix\Main\UI\Extension::load("folder_name.lib_name");