# Function: add() (/pixi-vn-ink/index/namespaces/VariableGetter/functions/add)



\> **add**(`handler`): `void`

Defined in: node_modules/@drincs/pixi-vn-json/dist/VariableGetter-ZDA6kdah.d.ts:20

Registers a new middleware handler into the resolution chain.
Handlers are invoked in the order they were added.

## Parameters [#parameters]

### handler [#handler]

`VariableGetterHandler`

The middleware handler to register.

## Returns [#returns]

`void`