#鸿蒙通关秘籍#系统api有没有实现默认的toast?想弹个窗口提醒用户，还挺麻烦的

那当然有了`promptAction`就是弹窗api

```javascript
import { `promptAction` } from '@kit.ArkUI'
import { `BusinessError` } from '@kit.BasicServicesKit';

@Entry
@Component
struct toastExample {
build() {
Column() {
Button('Show toast').fontSize(20)
.onClick(() => {
try {
`promptAction`.showToast({
message: 'Hello World',
duration: 2000
});
} catch (error) {
let message = (`error` as `BusinessError`).message
let code = (`error` as `BusinessError`).code
console.error(`showToast args error code is ${code}, message is ${message}`);
};
})
}.height('100%').width('100%').justifyContent(FlexAlign.Center)
}
}