精华内容
下载资源
问答
  • mounted

    2020-04-18 19:59:58
    mounted Type: Function Details: Called after the instance has been mounted, where el is replaced by the newly created vm.$el. If the root instance is mounted to an in-document element, vm.$el will a...

    mounted

    Type: Function
    
    Details:
    
    Called after the instance has been mounted, where el is replaced by the newly created vm.$el. If the root instance is mounted to an in-document element, vm.$el will also be in-document when mounted is called.
    
    Note that mounted does not guarantee that all child components have also been mounted. If you want to wait until the entire view has been rendered, you can use vm.$nextTick inside of mounted:
    
    mounted: function () {
      this.$nextTick(function () {
        // Code that will run only after the
        // entire view has been rendered
      })
    }
    
    This hook is not called during server-side rendering.
    
    See also: Lifecycle Diagram
    
    展开全文
  • Vue生命周期中mounted和created的区别

    万次阅读 多人点赞 2017-09-19 21:55:03
    通过一系列实践,现在把所有遇到的问题整理一遍,今天记录一下created和mounted的区别: 二、created和mounted区别? 官方图解如下: 我们从图中看两个节点: created:在模板渲染成html前调用,即通常...

    一、什么是生命周期?

    用通俗的语言来说,就是Vue中实例或者组件从创建到消灭中间经过的一系列过程。虽然不太严谨,但是也基本上可以理解。
    通过一系列实践,现在把所有遇到的问题整理一遍,今天记录一下created和mounted的区别:

    二、created和mounted区别?

    官方图解如下:

    我们从图中看两个节点:
    created:在模板渲染成html前调用,即通常初始化某些属性值,然后再渲染成视图。
    mounted:在模板渲染成html后调用,通常是初始化页面完成后,再对html的dom节点进行一些需要的操作。
    其实两者比较好理解,通常created使用的次数多,而mounted通常是在一些插件的使用或者组件的使用中进行操作,比如插件chart.js的使用: var ctx = document.getElementById(ID);通常会有这一步,而如果你写入组件中,你会发现在created中无法对chart进行一些初始化配置,一定要等这个html渲染完后才可以进行,那么mounted就是不二之选。下面看一个例子(用组件)。

    三、例子

    Vue.component("demo1",{
            data:function(){
                return {
                    name:"",
                    age:"",
                    city:""
                }
            },
            template:"<ul><li id='name'>{{name}}</li><li>{{age}}</li><li>{{city}}</li></ul>",
            created:function(){
                this.name="唐浩益"
                this.age = "12"
                this.city ="杭州"
                var x = document.getElementById("name")//第一个命令台错误
                console.log(x.innerHTML);
            },
            mounted:function(){
                var x = document.getElementById("name")//第二个命令台输出的结果
                console.log(x.innerHTML);
            }
        });
        var vm = new Vue({
            el:"#example1"
        })
    可以看到输出如下:

    可以看到都在created赋予初始值的情况下成功渲染出来了。
    但是同时看console台如下:

    可以看到第一个报了错,实际是因为找不到id,getElementById(ID) 并没有找到元素,原因如下:
    在created的时候,视图中的html并没有渲染出来,所以此时如果直接去操作html的dom节点,一定找不到相关的元素
    而在mounted中,由于此时html已经渲染出来了,所以可以直接操作dom节点,故输出了结果“唐浩益”。
    以上就是我自己总结的mounted和mounted的区别,写的比较简陋,记录下来,加深印象。
    展开全文
  • <div><p>podman unmount wants to know if the image is only mounted 1 time and refuse to unmount if the container state expects it to be mounted. <p>Signed-off-by: Daniel J Walsh </p><p>该提问来源于开源...
  • IsMounted deprecated

    2020-12-09 14:05:31
    Warning: setState(...): Can only update a mounted or mounting component. This usually means you called setState() on an unmounted component. This is a no-op. Please check the code for the ...
  • vue mounted组件的使用

    2020-08-27 08:31:11
    主要介绍了vue mounted组件的使用,小编觉得挺不错的,现在分享给大家,也给大家做个参考。一起跟随小编过来看看吧
  • vehicle mounted pet carriers

    2021-01-12 02:19:31
    <div><p>adds the infrastructure to support vehicle mounted pet carriers, and creates a new part, the livestock carrier, that can be installed on a vehicle as a livestock stall and used as a vehicle ...
  • Finding next mounted step

    2021-01-09 06:07:42
    <div><p>Currently when step is not mounted library skips it, but stays in undefined state. With this pr it will try to find next mounted step. If any - library will trigger <code>finished</code> ...
  • <p><code>If mounted or unmounted, the device will be actively mounted or unmounted as needed and appropriately configured in fstab.</code></p> <p>Obviously, if a mount is already mounted, mounting it ...
  • Vue父组件mounted执行完后后再执行子组件mounted需求背景深入分析父子组件生命周期执行顺序解决办法 需求背景 我们在父组件中 mounted 生命周期钩子函数中执行百度地图的初始化创建; 在子组件的 mounted 中,执行...

    需求背景

    我们在父组件中的 mounted 生命周期钩子函数中执行百度地图的初始化创建;

    在子组件的 mounted 中,调用接口,将数据坐标点添加到地图上。

    <!-- parent-component.vue -->
    <template>
      <div class="map" id="map"></div>
      <child-component></child-component>
    </template>
    
    <script>
    export default {
      data() {
    	return {
    	  map: null
    	}
      },
      mounted() {
        // 创建地图实例
    	this.map = new BMap.Map('map')
      }
    }
    </script>
    
    <!-- child-component.vue -->
    <template>
      <div>...</div>
    </template>
    
    <script>
    export default {
      mounted() {
        // 下面这一行是模拟调用接口的情况,返回一个数据
        let point = this.$ajax.getPoint()
        // 创建一个点,将点添加到地图中
        this.$parent.map.addOverly(point)
      }
    }
    </script>
    

    现在这样可能会报错,因为父组件中的 map 还没创建成功。必须确保父组件的 map 创建完成,才能使用 this.$parent.map 的方法。

    那么,现在的问题是:如何保证父组件 mounted 结束后再进行子组件 mounted

    深入分析

    你需要了解父子组件生命周期的执行顺序

    父子组件生命周期执行顺序

    父组件先进行创建,在挂载(mounted)前,子组件进行创建+挂载,子组件挂载完成后父组件挂载。
    整个顺序就是:

    父组件:beforeCreate
    父组件:created
    父组件:beforeMount
    子组件:beforeCreate
    子组件:createc
    子组件:beforeMount
    子组件:mounted
    父组件:mounted
    

    可以看出是先子组件 mounted 之后父组件 mounted,那么,如何实现父组件 mounted 完毕后再子组件 mounted 呢?

    解决办法

    【思路】 通过打印 this 发现,有一个 _isMounted 属性,表示当前是否挂载完毕(true:挂载完毕,false:没有挂载完成),在父组件挂载前将 _isMounted 存在 window 中,挂载后更新 _isMounted。在子组件 mounted 中添加定时器,根据 _isMounted 判断是否执行初始化方法。

    // 父组件
    beforeMount() {
    	window.parentMounted = this._isMounted	// _isMounted是当前实例mouned()是否执行 此时为false
    },
    mounted() {
    	await GaodeMap().then(() => {
    		// ...
    	})
    	window.parentMounted = this._isMounted	// _isMounted是当前实例mouned()是否执行 此时为true
    }
    
    // 子组件
    mounted() {
        let pMountedTimer = window.setInterval(() => {
            if (window.parentMounted ) {
    	        window.clearInterval(pMountedTimer)
    	        // 下面就可以写子组件想在mounted时执行代码(此时父组件的mounted已经执行完毕)
    			this.initData()
            }
        }, 500)
    }
    

    [拓展]生命周期执行顺序

    • 子组件更新过程
    - 父beforeUpdate -> 子beforeUpdate -> 子updated -> 父updated
    
    • 父组件更新过程
    - 影响到子组件: -  父beforeUpdate -> 子beforeUpdate -> 子updated -> 父updated
    - 不影响子组件: -  父beforeUpdate -> 父updated
    
    • 销毁过程
    - 父beforeDestroy -> 子beforeDestroy -> 子destroyed -> 父destroyed
    

    -----------------(正文完)------------------

    前端学习交流群,想进来面基的,可以加群:
    Vue学习交流 React学习交流
    或者手动search群号:685486827832485817


    写在最后:约定优于配置 —— 软件开发的简约原则
    --------------------------------(完)--------------------------------------

    我的:
    个人网站: https://neveryu.github.io/neveryu/
    Github: https://github.com/Neveryu
    新浪微博: https://weibo.com/Neveryu

    更多学习资源请关注我的新浪微博…

    展开全文
  • Mounted folder is empty

    2020-12-27 05:32:42
    t show files in mounted directory. <ol><li>I created secure folder <code>securefs create Asd</code></li><li>I've mounted it <code>securefs mount -v Asd Qwe</code></li><li><code>cp image.jpg Qwe/...
  • <div><p>You want to share the mounted directory using your winfsp. However, I noticed some problems. Sample code passthrough is used. First, when I access the mounted directory from the outside, I can...
  • <p>Note that <code>mounted</code> does <strong>not</strong> guarantee that all child components have also been mounted. If you want to wait until the entire view has been rendered, you can use <code>...
  • watch mounted file systems

    2020-12-01 20:09:45
    <div><p>no events are fired on the file systems mounted under root /mnt/ as a user do you have to be the owner of the location for the events be to fired? Thanks.</p><p>该提问来源于开源项目:c4...
  • 【Flutter】mounted

    千次阅读 2020-06-17 18:30:06
    mounted 是 bool 类型,表示当前 State 是否加载到树⾥。 常用于判断页面是否释放。 比如在程序中有些一步的处理,当处理结束时直接调用setState方法会直接报错,因为页面已经释放了,此时无法渲染页面,这时就...

    mounted 是 bool 类型,表示当前 State 是否加载到树⾥。

    常用于判断页面是否释放。

    比如在程序中有些异步的处理,当处理结束时直接调用setState方法会直接报错,因为页面已经释放(dispose)了,此时无法渲染页面,这时就可以使用mounted来进行判断页面是否被释放,如果释放了就不进行渲染。

    if(mounted){
        setState((){   
           
        }) 
    }

     

    展开全文
  • 问题背景今天帮忙解决问题的时候遇到了一个很奇怪的问题,点击一个按钮跳转的另一个页面,他的mounted方法执行了三遍,想到这个问题我确实是很困惑的,查阅网络资料说是v-if和v-show的问题,线下我自己验证了一下,...
  • vue created mounted 区别

    2021-02-05 15:59:42
    在做vue项目时,有些人喜欢把操作放在created里面,而有些人喜欢放在mounted里面,这里来谈谈自己堆这两个 的理解吧,说的不好勿怪,说的好请点赞,若有不同见解多多评论 mounted 特点:在vue的mounted这个周期,...
  • Error in mounted hook

    2020-12-27 05:43:15
    <p>Error in mounted hook: "TypeError: cal.fullCalendar is not a function" <p>Along with <p>cal.fullCalendar is not a function <p>But on page refresh it goes away and the calendar load and ...
  • vue中created、mounted等方法整理

    万次阅读 多人点赞 2018-05-09 16:17:11
    created:html加载完成之前,执行mounted:html加载完成后执行methods:事件方法执行watch:watch是去监听一个值的变化,然后执行相对应的函数。computed:computed是计算属性,也就是依赖其它的属性计算所得出最后的...
  • <div><p>When lxd is killed (for whatever reason), at started it appears lxd remount /var/lib/lxd/shmounts even if it is allready mounted. After some upgrades you end up with a whole lot of mount for /...
  • created mounted updated

    2019-06-09 23:30:34
    mounted :html渲染完成 可以获取到元素 updated:只有事先设置好的data变量如下arrData改变并且要在页面重新渲染{{ arrData }}完成之后,才会进updated方法,光改变arrData但不渲染页面是不会进的. ...
  • The only thing I can think that would cause this is that the unit has 1 range, the same as a skirmisher, and the game is using Range to determine what promotion tree to use, rather than IsMounted. ...
  • <div><p>There is code path where a volume that remained mounted, gets erased by shred. This has happened for various reasons, like incorrect paths use by tester code. Detect that the device is opened,...
  • 建议使用 uni-app 的 onReady代替 vue 的 mounted。今天写程序时候,遇到这个问题,感觉mounted比onReady还快执行,感觉onReady是页面在渲染v-show之后执行的而mounted还没有执行完v-show就执行了..{{index}}onReady: ...
  • I mounted both of them to a Linux VM. Ran a script to load the same set of files from both types of storage. While loading from Azure files took 27 secs, loading from Azure Blob storage took 5 ...
  • <div><p>I'...ll be able to delete the cached packages from the container without deleting them from the mounted directory.</p><p>该提问来源于开源项目:grammarly/rocker</p></div>
  • 这次给大家带来怎样实现Vue中mounted钩子函数获取节点高度,实现Vue中mounted钩子函数获取节点高度的注意事项有哪些,下面就是实战案例,一起来看一下。遇到的问题最近在开发一个Vue的项目,好几个页面都有用到一个 ...

空空如也

空空如也

1 2 3 4 5 ... 20
收藏数 23,556
精华内容 9,422
关键字:

mounted