<function name="SetNWVarProxy" parent="Entity" type="classfunc"> <description>Sets a function to be called when the NWVar changes.</description> <realm>Shared</realm> <file line="508">lua/includes/extensions/entity.lua</file> <args> <arg name="key" type="any">The key of the NWVar to add callback for.</arg> <arg name="callback" type="function">The function to be called when the NWVar changes. It has 4 arguments: * <page>Entity</page> ent - The entity * <page>string</page> name - Name of the NWVar that has changed * <page>any</page> oldval - The old value * <page>any</page> newval - The new value</arg> </args> </function> <example> <description>Prints all changes to a NWVar called "Key" of Player 1.</description> <code> Entity( 1 ):SetNWVarProxy( "Key", print ) Entity( 1 ):SetNWString( "Key", "Value" ) Entity( 1 ):SetNWString( "Key", "Table" ) </code> <outputfixedwidth>Fixed width</outputfixedwidth>⤶ <output> ```⤶ Player [1][Player1] Key nil Value Player [1][Player1] Key Value Table ```⤶ </output> </example>