<!-- Do not edit this file. It is automatically generated by API Documenter. -->
[`Workspace`](Workspace) › [on('quick-preview')](Workspace/on('quick-preview').md)
## Workspace.on('quick-preview') method
Triggered when the active Markdown file is modified. React to file changes before they are saved to disk.
0.9.7
**Signature:**
```typescript
on(name: 'quick-preview', callback: (file: TFile, data: string) => any, ctx?: any): EventRef;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| <code>name</code> | <code>'quick-preview'</code> | |
| <code>callback</code> | <code>(file: </code>[`TFile`](TFile)<code>, data: string) => any</code> | |
| <code>ctx</code> | <code>any</code> | _(Optional)_ |
**Returns:**
[`EventRef`](EventRef)