1# Component Gallery 2 3### Introduction 4 5This sample demonstrates the functions of different components such as universal events, universal attributes, and gestures. 6 7### Concepts 8 9Components can be common events, common attributes, or gestures. 10 11### Required Permissions 12 13N/A 14 15### How to Use 16 171. On the home page of the sample app, choose any component. 18 192. Experience the component functions as prompted. 20 213. Click **Back** to return to the home page. 22 23### Constraints 24 251. This sample can only be run on standard-system devices. 26 272. DevEco Studio 3.0 Beta4 (Build version: 3.0.0.992, built on July 14, 2022) must be used. 28