vue3 watch immediate
时间: 2023-11-01 08:00:42 浏览: 44
在Vue3中,watch特性进行了一些改变和优化。其中一个常用的高级用法是immediate。immediate选项可以在watch被创建时立即执行一次回调函数,而不需要等待被监听的值发生变化。这对于需要立即执行一次回调函数的场景非常有用。
具体使用方法如下:
```javascript
watch(
() => {
// 监听的值
return value
},
(newValue, oldValue) => {
// 回调函数
// 在监听的值发生变化时触发,包括第一次执行
},
{
immediate: true // 设置immediate为true
}
)
```
相关问题
vue3 watch immediate: true
在Vue 3中,使用`watch`来监听数据的变化。在`watch`中,可以通过设置`immediate: true`来在页面一开始加载时立即执行监听的回调函数。<em>1</em><em>2</em><em>3</em>
#### 引用[.reference_title]
- *1* *3* [Vue3的watch监听的多种情况](https://blog.csdn.net/m0_57482322/article/details/123157229)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}} ] [.reference_item]
- *2* [vue3 watch监听 (immediate / deep / watchEffect)](https://blog.csdn.net/Frazier1995/article/details/127490928)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}} ] [.reference_item]
[ .reference_list ]
vue 的watch immediate
引用<em>1</em><em>2</em><em>3</em>
#### 引用[.reference_title]
- *1* [VUE hook function of watch‘s immediate property vue watch函数 无法监听对象问题](https://blog.csdn.net/u012558074/article/details/130400791)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}} ] [.reference_item]
- *2* *3* [vue的watch中的immediate什么意思](https://blog.csdn.net/ZZZ___jh/article/details/117067170)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}} ] [.reference_item]
[ .reference_list ]