<function name="OnBeginLoadingDocument" parent="DHTML" type="panelhook"> <ishook>yes</ishook>⤶ <description>Called when this panel begins loading a page.</description> <realm>Client</realm> <file line="148-L152">lua/vgui/dhtml.lua</file> <args> <arg name="url" type="string">The URL of the current page.</arg> </args> </function>