---
title: execCommand
framework: WebKit JS
role: symbol
role_heading: Instance Method
platforms: [Safari Desktop 10.0+, Safari Mobile 10.0+]
path: webkitjs/document/1632445-execcommand
---

# execCommand

## Declaration

```data
boolean execCommand(
    DOMString command, 
    optional boolean userInterface, 
    optional DOMString? value
);
```