<!-- Do not edit this file. It is automatically generated by API Documenter. --> [`Vault`](Vault) › [on('modify')](Vault/on('modify').md) ## Vault.on('modify') method Called when a file is modified. **Signature:** ```typescript on(name: 'modify', callback: (file: TAbstractFile) => any, ctx?: any): EventRef; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | <code>name</code> | <code>'modify'</code> | | | <code>callback</code> | <code>(file: </code>[`TAbstractFile`](TAbstractFile)<code>) =&gt; any</code> | | | <code>ctx</code> | <code>any</code> | _(Optional)_ | **Returns:** [`EventRef`](EventRef)