---
schema_version: "1"
id: 6ce06277d2d70ed8b96bc172cb6b9ea92fa33bc0423f8fd989d953a0d059620f
title: FirstVizSizeKnownEvent | Tableau Embedding API
collection: tableau
version: current
locale: en-us
portal_url: https://docs.salesforce.com/tableau/current/en-us/api/embedding_api/reference/interfaces/FirstVizSizeKnownEvent.md
canonical_url: https://help.tableau.com/current/api/embedding_api/en-us/reference/interfaces/FirstVizSizeKnownEvent.html
source_site: help.tableau.com
content_type: documentation
content_hash: 8b55724a15e48a2c7e62af9f495a86c95f3e36afe733663b390dfdad7b87a453
description: Documentation for Tableau Embedding API
---
- FirstVizSizeKnownEvent

# Interface FirstVizSizeKnownEvent

Initial event which is triggered as soon as the viz size is known

interface FirstVizSizeKnownEvent {  
    [vizSize](#vizsize): [VizSize](https://help.tableau.com/current/api/embedding_api/en-us/reference/interfaces/VizSize.html);  
}

- Defined in packages/api-external-contract-js/src/ExternalContract/Embedding/EventInterfaces.ts:14

##### Index

### Properties

[vizSize](#vizsize)

## Properties

### `Readonly`vizSize[](#vizsize)

vizSize: [VizSize](https://help.tableau.com/current/api/embedding_api/en-us/reference/interfaces/VizSize.html)

- Defined in packages/api-external-contract-js/src/ExternalContract/Embedding/EventInterfaces.ts:15

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Properties

[vizSize](#vizsize)