hytopia/docs/server.playerui.append.md

The HYTOPIA SDK makes it easy for developers to create massively multiplayer games using JavaScript or TypeScript.

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## PlayerUI.append() method

Appends UI HTML to the player's existing client UI.

Use for: incremental overlays (notifications, tooltips, modal layers). Do NOT use for: replacing the entire UI; use `PlayerUI.load`<!-- -->.

**Signature:**

```typescript
append(htmlUri: string): void;
```

## Parameters

<table><thead><tr><th>

Parameter


</th><th>

Type


</th><th>

Description


</th></tr></thead>
<tbody><tr><td>

htmlUri


</td><td>

string


</td><td>

The UI HTML URI to append.

\*\*Requires:\*\* Player must be in a world.

\*\*Side effects:\*\* Emits `PlayerUIEvent.APPEND`<!-- -->.

\*\*Category:\*\* Players


</td></tr>
</tbody></table>
**Returns:**

void

## Remarks

Multiple calls in the same tick append in call order. If used with `PlayerUI.load` in the same tick, appends occur after the load.