# Interface: ExpressionJSON (/pixi-vn-live2d/core/namespaces/Cubism2Spec/interfaces/ExpressionJSON)



Defined in: node_modules/untitled-pixi-live2d-engine/types/index.d.ts:4944

## Properties [#properties]

### fade_in? [#fade_in]

\> `optional` **fade_in?**: `number`

Defined in: node_modules/untitled-pixi-live2d-engine/types/index.d.ts:4945

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### fade_out? [#fade_out]

\> `optional` **fade_out?**: `number`

Defined in: node_modules/untitled-pixi-live2d-engine/types/index.d.ts:4946

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### params? [#params]

\> `optional` **params?**: `object`\[]

Defined in: node_modules/untitled-pixi-live2d-engine/types/index.d.ts:4947

#### calc? [#calc]

\> `optional` **calc?**: `"add"` | `"set"` | `"mult"`

#### def? [#def]

\> `optional` **def?**: `number`

#### id [#id]

\> **id**: `string`

#### val [#val]

\> **val**: `number`