vue3生命周期onmounted

在Vue3中，onMounted是一个新的生命周期钩子函数，它在组件挂载到DOM之后被调用。 这个钩子函数可以用来执行一些需要在组件挂载后操作的逻辑，比如发送请求或者订阅事件。它可以替代Vue2中的mounted钩子函数。在onMounted钩子函数中，你可以访问到组件的实例＊＊＊<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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