1# JavaScript Bubble<a name="EN-US_TOPIC_0000001175858131"></a> 2 3### Introduction<a name="section104mcpsimp"></a> 4 5This sample shows JavaScript bubbles. After you click a bound component, a bubble with a message is displayed to provide you with guidance. You can define component attributes such as its position, style, and events to respond. 6 7### Usage<a name="section107mcpsimp"></a> 8 9On the home screen of the sample app, touch the prompt button or the text box. A JavaScript bubble is displayed. The bubble disappears after you touch it. 10 11### Constraints<a name="section110mcpsimp"></a> 12 13This sample can only be run on standard-system devices. 14 15