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[`MetadataCache`](MetadataCache) › [on('changed')](MetadataCache/on('changed').md)
## MetadataCache.on('changed') method
Called when a file has been indexed, and its (updated) cache is now available.
Note: This is not called when a file is renamed for performance reasons. You must hook the vault rename event for those.
**Signature:**
```typescript
on(name: 'changed', callback: (file: TFile, data: string, cache: CachedMetadata) => any, ctx?: any): EventRef;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| <code>name</code> | <code>'changed'</code> | |
| <code>callback</code> | <code>(file: </code>[`TFile`](TFile)<code>, data: string, cache: </code>[`CachedMetadata`](CachedMetadata)<code>) => any</code> | |
| <code>ctx</code> | <code>any</code> | _(Optional)_ |
**Returns:**
[`EventRef`](EventRef)