Menu
×
   ❮   
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

Vue 'unmounted' 生命周期钩子


示例

使用 unmounted 生命周期钩子在组件从 DOM 中移除时创建警报。

<script>
export default {
    unmounted() {
        alert("The component is removed (unmounted)!");
  }
}
</script>
运行示例 »

定义和用法

组件从 DOM 中移除后,会调用 unmounted 生命周期钩子。

此钩子可以用于移除事件监听器,或取消计时器或间隔。

注意:在上面的示例中,警报框在我们可以看到组件被移除之前就出现了。这是因为首先组件从 DOM 中移除,然后出现警报,最后,当你点击警报框中的“确定”时,浏览器渲染页面,DOM 中不再包含该组件。


相关页面

Vue 教程:Vue 生命周期钩子

Vue 教程:'unmounted' 钩子

Vue 参考:Vue 'beforeUnmount' 生命周期钩子


×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
[email protected]

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
[email protected]

W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2024 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.