检测点击外部元素

Question

如何检测元素外的点击？我正在使用 Vue.js 所以它会在我的模板元素之外。我知道如何在 Vanilla JS 中执行此操作，但我不确定在使用 Vue.js?

时是否有更合适的方法来执行此操作

这是 Vanilla JS 的解决方案：Javascript Detect Click event outside of div

我想我可以使用更好的方法来访问元素？

Answer 1

你可以像这样为点击事件注册两个事件监听器

document.getElementById("some-area")
        .addEventListener("click", function(e){
        alert("You clicked on the area!");
        e.stopPropagation();// this will stop propagation of this event to upper level
     }
);

document.body.addEventListener("click", 
   function(e) {
           alert("You clicked outside the area!");
         }
);

Answer 2

请注意，此解决方案仅适用于 Vue 1。

设置一次自定义指令就可以很好地解决：

Vue.directive('click-outside', {
  bind () {
      this.event = event => this.vm.$emit(this.expression, event)
      this.el.addEventListener('click', this.stopProp)
      document.body.addEventListener('click', this.event)
  },   
  unbind() {
    this.el.removeEventListener('click', this.stopProp)
    document.body.removeEventListener('click', this.event)
  },

  stopProp(event) { event.stopPropagation() }
})

用法：

<div v-click-outside="nameOfCustomEventToCall">
  Some content
</div>

在组件中：

events: {
  nameOfCustomEventToCall: function (event) {
    // do something - probably hide the dropdown menu / modal etc.
  }
}

JSFiddle 上的工作演示以及有关注意事项的其他信息：

https://jsfiddle.net/Linusborg/yzm8t8jq/

Answer 3

这是我使用的解决方案，它基于 Linus Borg 的回答并且适用于 vue.js 2.0。

Vue.directive('click-outside', {
  bind: function (el, binding, vnode) {
    el.clickOutsideEvent = function (event) {
      // here I check that click was outside the el and his children
      if (!(el == event.target || el.contains(event.target))) {
        // and if it did, call method provided in attribute value
        vnode.context[binding.expression](event);
      }
    };
    document.body.addEventListener('click', el.clickOutsideEvent)
  },
  unbind: function (el) {
    document.body.removeEventListener('click', el.clickOutsideEvent)
  },
});

您使用 v-click-outside 绑定到它：

<div v-click-outside="doStuff">

Here's a small demo

您可以在 https://vuejs.org/v2/guide/custom-directive.html#Directive-Hook-Arguments

中找到更多关于自定义指令的信息以及 el、绑定、vnode 的含义

Answer 4

人们经常想知道用户是否离开根组件（适用于任何级别的组件）

Vue({
  data: {},
  methods: {
    unfocused : function() {
      alert('good bye');
    }
  }
})

<template>
  <div tabindex="1" @blur="unfocused">Content inside</div>
</template>

Answer 5

我有一个处理切换下拉菜单的解决方案：

export default {
data() {
  return {
    dropdownOpen: false,
  }
},
methods: {
      showDropdown() {
        console.log('clicked...')
        this.dropdownOpen = !this.dropdownOpen
        // this will control show or hide the menu
        $(document).one('click.status', (e)=> {
          this.dropdownOpen = false
        })
      },
}

Answer 6

社区中有两个包可用于此任务（均已维护）：

• https://github.com/simplesmiler/vue-clickaway
• https://github.com/ndelvalle/v-click-outside

Answer 7

这适用于 Vue.js 2.5.2 :

/**
 * Call a function when a click is detected outside of the
 * current DOM node ( AND its children )
 *
 * Example :
 *
 * <template>
 *   <div v-click-outside="onClickOutside">Hello</div>
 * </template>
 *
 * <script>
 * import clickOutside from '../../../../directives/clickOutside'
 * export default {
 *   directives: {
 *     clickOutside
 *   },
 *   data () {
 *     return {
         showDatePicker: false
 *     }
 *   },
 *   methods: {
 *     onClickOutside (event) {
 *       this.showDatePicker = false
 *     }
 *   }
 * }
 * </script>
 */
export default {
  bind: function (el, binding, vNode) {
    el.__vueClickOutside__ = event => {
      if (!el.contains(event.target)) {
        // call method provided in v-click-outside value
        vNode.context[binding.expression](event)
        event.stopPropagation()
      }
    }
    document.body.addEventListener('click', el.__vueClickOutside__)
  },
  unbind: function (el, binding, vNode) {
    // Remove Event Listeners
    document.body.removeEventListener('click', el.__vueClickOutside__)
    el.__vueClickOutside__ = null
  }
}

Answer 8

我使用这个代码：

显示-隐藏按钮

 <a @click.stop="visualSwitch()"> show hide </a>

显示隐藏元素

<div class="dialog-popup" v-if="visualState" @click.stop=""></div>

脚本

data () { return {
    visualState: false,
}},
methods: {
    visualSwitch() {
        this.visualState = !this.visualState;
        if (this.visualState)
            document.addEventListener('click', this.visualState);
        else
            document.removeEventListener('click', this.visualState);
    },
},

更新：移除手表；添加停止传播

Answer 9

我更新了 MadisonTrash 的回答以支持 Mobile Safari（它没有 click 事件，必须使用 touchend 代替）。这还包含一个检查，以便不会通过在移动设备上拖动来触发该事件。

Vue.directive('click-outside', {
    bind: function (el, binding, vnode) {
        el.eventSetDrag = function () {
            el.setAttribute('data-dragging', 'yes');
        }
        el.eventClearDrag = function () {
            el.removeAttribute('data-dragging');
        }
        el.eventOnClick = function (event) {
            var dragging = el.getAttribute('data-dragging');
            // Check that the click was outside the el and its children, and wasn't a drag
            if (!(el == event.target || el.contains(event.target)) && !dragging) {
                // call method provided in attribute value
                vnode.context[binding.expression](event);
            }
        };
        document.addEventListener('touchstart', el.eventClearDrag);
        document.addEventListener('touchmove', el.eventSetDrag);
        document.addEventListener('click', el.eventOnClick);
        document.addEventListener('touchend', el.eventOnClick);
    }, unbind: function (el) {
        document.removeEventListener('touchstart', el.eventClearDrag);
        document.removeEventListener('touchmove', el.eventSetDrag);
        document.removeEventListener('click', el.eventOnClick);
        document.removeEventListener('touchend', el.eventOnClick);
        el.removeAttribute('data-dragging');
    },
});

Answer 10

export default {
  bind: function (el, binding, vNode) {
    // Provided expression must evaluate to a function.
    if (typeof binding.value !== 'function') {
      const compName = vNode.context.name
      let warn = `[Vue-click-outside:] provided expression '${binding.expression}' is not a function, but has to be`
      if (compName) { warn += `Found in component '${compName}'` }

      console.warn(warn)
    }
    // Define Handler and cache it on the element
    const bubble = binding.modifiers.bubble
    const handler = (e) => {
      if (bubble || (!el.contains(e.target) && el !== e.target)) {
        binding.value(e)
      }
    }
    el.__vueClickOutside__ = handler

    // add Event Listeners
    document.addEventListener('click', handler)
  },

  unbind: function (el, binding) {
    // Remove Event Listeners
    document.removeEventListener('click', el.__vueClickOutside__)
    el.__vueClickOutside__ = null

  }
}

Answer 11

如果有人正在寻找如何在模态框外单击时隐藏模态框。由于模态通常有其包装器 class 或 modal-wrap 或您命名的任何名称，因此您可以将 @click="closeModal" 放在包装器上。使用 vuejs 文档中所述的 event handling，您可以检查点击的目标是在包装器上还是在模态上。

methods: {
  closeModal(e) {
    this.event = function(event) {
      if (event.target.className == 'modal-wrap') {
        // close modal here
        this.$store.commit("catalog/hideModal");
        document.body.removeEventListener("click", this.event);
      }
    }.bind(this);
    document.body.addEventListener("click", this.event);
  },
}

<div class="modal-wrap" @click="closeModal">
  <div class="modal">
    ...
  </div>
<div>

Answer 12

我正在使用这个包：https://www.npmjs.com/package/vue-click-outside

对我来说很好用

HTML :

<div class="__card-content" v-click-outside="hide" v-if="cardContentVisible">
    <div class="card-header">
        <input class="subject-input" placeholder="Subject" name=""/>
    </div>
    <div class="card-body">
        <textarea class="conversation-textarea" placeholder="Start a conversation"></textarea>
    </div>
</div>

我的脚本代码：

import ClickOutside from 'vue-click-outside'
export default
{
    data(){
        return {
            cardContentVisible:false
        }
    },
    created()
    {
    },
    methods:
        {
            openCardContent()
            {
                this.cardContentVisible = true;
            }, hide () {
            this.cardContentVisible = false
                }
        },
    directives: {
            ClickOutside
    }
}

Answer 13

将 tabindex 属性添加到您的组件，以便它可以聚焦并执行以下操作：

<template>
    <div
        @focus="handleFocus"
        @focusout="handleFocusOut"
        tabindex="0"
    >
      SOME CONTENT HERE
    </div>
</template>

<script>
export default {    
    methods: {
        handleFocus() {
            // do something here
        },
        handleFocusOut() {
            // do something here
        }
    }
}
</script>

Answer 14

我结合了所有答案（包括来自 vue-clickaway 的一行）并提出了适合我的解决方案：

Vue.directive('click-outside', {
    bind(el, binding, vnode) {
        var vm = vnode.context;
        var callback = binding.value;

        el.clickOutsideEvent = function (event) {
            if (!(el == event.target || el.contains(event.target))) {
                return callback.call(vm, event);
            }
        };
        document.body.addEventListener('click', el.clickOutsideEvent);
    },
    unbind(el) {
        document.body.removeEventListener('click', el.clickOutsideEvent);
    }
});

在组件中使用：

<li v-click-outside="closeSearch">
  <!-- your component here -->
</li>

Answer 15

@Denis Danilenko 解决方案对我有用，这就是我所做的： 顺便说一句，我在这里使用 VueJS CLI3 和 NuxtJS 以及 Bootstrap4，但它也可以在没有 NuxtJS 的 VueJS 上运行：

<div
    class="dropdown ml-auto"
    :class="showDropdown ? null : 'show'">
    <a 
        href="#" 
        class="nav-link" 
        role="button" 
        id="dropdownMenuLink" 
        data-toggle="dropdown" 
        aria-haspopup="true" 
        aria-expanded="false"
        @click="showDropdown = !showDropdown"
        @blur="unfocused">
        <i class="fas fa-bars"></i>
    </a>
    <div 
        class="dropdown-menu dropdown-menu-right" 
        aria-labelledby="dropdownMenuLink"
        :class="showDropdown ? null : 'show'">
        <nuxt-link class="dropdown-item" to="/contact">Contact</nuxt-link>
        <nuxt-link class="dropdown-item" to="/faq">FAQ</nuxt-link>
    </div>
</div>

export default {
    data() {
        return {
            showDropdown: true
        }
    },
    methods: {
    unfocused() {
        this.showDropdown = !this.showDropdown;
    }
  }
}

Answer 16

您可以从指令发出自定义原生 javascript 事件。使用 node.dispatchEvent

创建一个从节点分派事件的指令

let handleOutsideClick;
Vue.directive('out-click', {
    bind (el, binding, vnode) {

        handleOutsideClick = (e) => {
            e.stopPropagation()
            const handler = binding.value

            if (el.contains(e.target)) {
                el.dispatchEvent(new Event('out-click')) <-- HERE
            }
        }

        document.addEventListener('click', handleOutsideClick)
        document.addEventListener('touchstart', handleOutsideClick)
    },
    unbind () {
        document.removeEventListener('click', handleOutsideClick)
        document.removeEventListener('touchstart', handleOutsideClick)
    }
})

哪个可以这样用

h3( v-out-click @click="$emit('show')" @out-click="$emit('hide')" )

Answer 17

我在 body 的末尾创建了一个 div：

<div v-if="isPopup" class="outside" v-on:click="away()"></div>

其中 .outside 是：

.outside {
  width: 100vw;
  height: 100vh;
  position: fixed;
  top: 0px;
  left: 0px;
}

而 away() 是 Vue 实例中的一个方法 :

away() {
 this.isPopup = false;
}

Answer 18

如果您的组件在根元素内部有多个元素，您可以使用这个 It just works™ 布尔值解决方案。

<template>
  <div @click="clickInside"></div>
<template>

<script>
export default {
  name: "MyComponent",
  methods: {
    clickInside() {
      this.inside = true;
      setTimeout(() => (this.inside = false), 0);
    },
    clickOutside() {
      if (this.inside) return;
      // handle outside state from here
    }
  },
  created() {
    this.__handlerRef__ = this.clickOutside.bind(this);
    document.body.addEventListener("click", this.__handlerRef__);
  },
  destroyed() {
    document.body.removeEventListener("click", this.__handlerRef__);
  },
};
</script>

Answer 19

使用这个包vue-click-outside

它简单可靠，目前被许多其他软件包使用。您还可以通过仅在所需组件中调用包来减少 javascript 包的大小（参见下面的示例）。

npm install vue-click-outside

用法：

<template>
  <div>
    <div v-click-outside="hide" @click="toggle">Toggle</div>
    <div v-show="opened">Popup item</div>
  </div>
</template>

<script>
import ClickOutside from 'vue-click-outside'

export default {
  data () {
    return {
      opened: false
    }
  },

  methods: {
    toggle () {
      this.opened = true
    },

    hide () {
      this.opened = false
    }
  },

  mounted () {
    // prevent click outside event with popupItem.
    this.popupItem = this.$el
  },

  // do not forget this section
  directives: {
    ClickOutside
  }
}
</script>

Answer 20

  <button 
    class="dropdown"
    @click.prevent="toggle"
    ref="toggle"
    :class="{'is-active': isActiveEl}"
  >
    Click me
  </button>

  data() {
   return {
     isActiveEl: false
   }
  }, 
  created() {
    window.addEventListener('click', this.close);
  },
  beforeDestroy() {
    window.removeEventListener('click', this.close);
  },
  methods: {
    toggle: function() {
      this.isActiveEl = !this.isActiveEl;
    },
    close(e) {
      if (!this.$refs.toggle.contains(e.target)) {
        this.isActiveEl = false;
      }
    },
  },

Answer 21

这个问题已经有很多答案了，大部分都是基于类似自定义指令的思路。这种方式的问题是必须给指令传递一个方法函数，不能像其他事件那样直接写代码。

我创建了一个不同的新包 vue-on-clickout。在以下位置查看：

• https://github.com/MuTsunTsai/vue-on-clickout

它允许人们像任何其他事件一样编写 v-on:clickout。比如你可以这样写

<div v-on:clickout="myField=value" v-on:click="myField=otherValue">...</div>

而且有效。

更新

vue-on-clickout 现在支持 Vue 3！

更新 2

vue-on-clickout 现在被新包 Clickout-Event 取代，它适用于任何前端框架（或香草）！

Answer 22

我讨厌额外的功能所以...这是一个很棒的 vue 解决方案，没有额外的 vue 方法，只有 var

1. 创建 html 元素，设置控件和指令

    <p @click="popup = !popup" v-out="popup">

    <div v-if="popup">
       My awesome popup
    </div>

2. 在类似
的数据中创建一个变量

data:{
   popup: false,
}

3. 添加 vue 指令。它

Vue.directive('out', {

    bind: function (el, binding, vNode) {
        const handler = (e) => {
            if (!el.contains(e.target) && el !== e.target) {
                //and here is you toggle var. thats it
                vNode.context[binding.expression] = false
            }
        }
        el.out = handler
        document.addEventListener('click', handler)
    },

    unbind: function (el, binding) {
        document.removeEventListener('click', el.out)
        el.out = null
    }
})

Answer 23

简短的回答：这应该用 Custom Directives 来完成。

这里有很多很好的答案也说明了这一点，但是当您开始广泛使用外部点击（尤其是分层或多次排除）时，我看到的大多数答案都会崩溃。我在媒体上写了一篇 article，讨论自定义指令的细微差别以及这个指令的具体实现。它可能无法涵盖所有​​边缘情况，但它涵盖了我想到的所有内容。

这将考虑多个绑定、多个级别的其他元素排除，并允许您的处理程序仅管理 "business logic"。

这里至少是定义部分的代码，请查看文章以获取完整解释。

var handleOutsideClick={}
const OutsideClick = {
  // this directive is run on the bind and unbind hooks
  bind (el, binding, vnode) {
    // Define the function to be called on click, filter the excludes and call the handler
    handleOutsideClick[el.id] = e => {
      e.stopPropagation()
      // extract the handler and exclude from the binding value
      const { handler, exclude } = binding.value
      // set variable to keep track of if the clicked element is in the exclude list
      let clickedOnExcludedEl = false
      // if the target element has no classes, it won't be in the exclude list skip the check
      if (e.target._prevClass !== undefined) {
        // for each exclude name check if it matches any of the target element's classes
        for (const className of exclude) {
          clickedOnExcludedEl = e.target._prevClass.includes(className)
          if (clickedOnExcludedEl) {
            break // once we have found one match, stop looking
          }
        }
      }
      // don't call the handler if our directive element contains the target element
      // or if the element was in the exclude list
      if (!(el.contains(e.target) || clickedOnExcludedEl)) {
        handler()
      }
    }
    // Register our outsideClick handler on the click/touchstart listeners
    document.addEventListener('click', handleOutsideClick[el.id])
    document.addEventListener('touchstart', handleOutsideClick[el.id])
    document.onkeydown = e => {
      //this is an option but may not work right with multiple handlers
      if (e.keyCode === 27) {
        // TODO: there are minor issues when escape is clicked right after open keeping the old target
        handleOutsideClick[el.id](e)
      }
    }
  },
  unbind () {
    // If the element that has v-outside-click is removed, unbind it from listeners
    document.removeEventListener('click', handleOutsideClick[el.id])
    document.removeEventListener('touchstart', handleOutsideClick[el.id])
    document.onkeydown = null //Note that this may not work with multiple listeners
  }
}
export default OutsideClick

Answer 24

不要重新发明轮子，用这个包v-click-outside

Answer 25

我使用 created() 中的函数以稍微不同的方式完成了它。

  created() {
      window.addEventListener('click', (e) => {
        if (!this.$el.contains(e.target)){
          this.showMobileNav = false
        }
      })
  },

这样，如果有人在元素外部单击，那么在我的例子中，移动导航将被隐藏。

Answer 26

您可以创建处理外部点击的新组件

Vue.component('click-outside', {
  created: function () {
    document.body.addEventListener('click', (e) => {
       if (!this.$el.contains(e.target)) {
            this.$emit('clickOutside');
           
        })
  },
  template: `
    <template>
        <div>
            <slot/>
        </div>
    </template>
`
})

并使用这个组件：

<template>
    <click-outside @clickOutside="console.log('Click outside Worked!')">
      <div> Your code...</div>
    </click-outside>
</template>

Answer 27

如果您专门寻找元素外部但仍在父元素内的点击，您可以使用

<div class="parent" @click.self="onParentClick">
  <div class="child"></div>
</div>

我将其用于模态。

Answer 28

Vue 3 对指令进行了重大更改，所有 Vue 3 中做到这一点，这里是代码片段。有关信息，请浏览 this link

<div v-click-outside="methodToInvoke"></div>

click-outside.js

export default {
  beforeMount: function (el, binding, vnode) {
    binding.event = function (event) {
      if (!(el === event.target || el.contains(event.target))) {
        if (binding.value instanceof Function) {
          binding.value(event)
        }
      }
    }
    document.body.addEventListener('click', binding.event)
  },
  unmounted: function (el, binding, vnode) {
    document.body.removeEventListener('click', binding.event)
  }
}

并在 main.js 中添加以下内容

// Directives
import ClickOutside from './click-outside'

createApp(App)
 .directive('click-outside', ClickOutside)
 .use(IfAnyModules)
 .mount('#app')

Answer 29

对于 Vue 3：

此答案基于 MadisonTrash 的 ，但已更新为使用新的 Vue 3 语法。

Vue 3 现在使用 beforeMount 代替 bind，并使用 unmounted 代替 unbind (src)。

const clickOutside = {
  beforeMount: (el, binding) => {
    el.clickOutsideEvent = event => {
      // here I check that click was outside the el and his children
      if (!(el == event.target || el.contains(event.target))) {
        // and if it did, call method provided in attribute value
        binding.value();
      }
    };
    document.addEventListener("click", el.clickOutsideEvent);
  },
  unmounted: el => {
    document.removeEventListener("click", el.clickOutsideEvent);
  },
};

createApp(App)
  .directive("click-outside", clickOutside)
  .mount("#app");

Answer 30

vue 3 的完整案例

这是一个基于 MadisonTrash 答案的完整解决方案，并且 benrwb 和 fredrivett 调整了 safari 兼容性和 vue 3 api 更改。

编辑：

下面提出的解决方案仍然有用，使用方法仍然有效，但我将其更改为使用 document.elementsFromPoint 而不是 event.contains 因为它无法将某些元素识别为子元素就像 svgs 中的 <path> 标签。所以正确的指令是这个：

export default {
    beforeMount: (el, binding) => {
        el.eventSetDrag = () => {
            el.setAttribute("data-dragging", "yes");
        };
        el.eventClearDrag = () => {
            el.removeAttribute("data-dragging");
        };
        el.eventOnClick = event => {
            const dragging = el.getAttribute("data-dragging");
            // Check that the click was outside the el and its children, and wasn't a drag
            console.log(document.elementsFromPoint(event.clientX, event.clientY))
            if (!document.elementsFromPoint(event.clientX, event.clientY).includes(el) && !dragging) {
                // call method provided in attribute value
                binding.value(event);
            }
        };
        document.addEventListener("touchstart", el.eventClearDrag);
        document.addEventListener("touchmove", el.eventSetDrag);
        document.addEventListener("click", el.eventOnClick);
        document.addEventListener("touchend", el.eventOnClick);
    },
    unmounted: el => {
        document.removeEventListener("touchstart", el.eventClearDrag);
        document.removeEventListener("touchmove", el.eventSetDrag);
        document.removeEventListener("click", el.eventOnClick);
        document.removeEventListener("touchend", el.eventOnClick);
        el.removeAttribute("data-dragging");
    },
};

旧答案：

指令

const clickOutside = {
    beforeMount: (el, binding) => {
        el.eventSetDrag = () => {
            el.setAttribute("data-dragging", "yes");
        };
        el.eventClearDrag = () => {
            el.removeAttribute("data-dragging");
        };
        el.eventOnClick = event => {
            const dragging = el.getAttribute("data-dragging");  
            // Check that the click was outside the el and its children, and wasn't a drag
            if (!(el == event.target || el.contains(event.target)) && !dragging) {
                // call method provided in attribute value
                binding.value(event);
            }
        };
        document.addEventListener("touchstart", el.eventClearDrag);
        document.addEventListener("touchmove", el.eventSetDrag);
        document.addEventListener("click", el.eventOnClick);
        document.addEventListener("touchend", el.eventOnClick);
    },
    unmounted: el => {
        document.removeEventListener("touchstart", el.eventClearDrag);
        document.removeEventListener("touchmove", el.eventSetDrag);
        document.removeEventListener("click", el.eventOnClick);
        document.removeEventListener("touchend", el.eventOnClick);
        el.removeAttribute("data-dragging");
    },
}

createApp(App)
  .directive("click-outside", clickOutside)
  .mount("#app");

此解决方案监视应用指令的组件的元素和元素的子元素，以检查 event.target 元素是否也是子元素。如果是这种情况，它不会触发，因为它在组件内部。

如何使用

您只需使用 as any 指令，并使用方法引用来处理触发器：

<template>
    <div v-click-outside="myMethod">
        <div class="handle" @click="doAnotherThing($event)">
            <div>Any content</div>
        </div>
    </div>
</template>

Answer 31

我不确定是否有人会看到这个答案，但它就在这里。 这里的想法是简单地检测是否有任何点击是在元素本身之外进行的。

我首先为“下拉菜单”的主要 div 指定一个 ID。

<template>
  <div class="relative" id="dropdown">
    <div @click="openDropdown = !openDropdown" class="cursor-pointer">
      <slot name="trigger" />
    </div>

    <div
      class="absolute mt-2 w-48 origin-top-right right-0 text-red  bg-tertiary text-sm text-black"
      v-show="openDropdown"
      @click="openDropdown = false"
    >
      <slot name="content" />
    </div>
  </div>
</template>

然后我只是循环遍历鼠标事件的路径，看看是否有带有我的 ID“dropdown”的 div。如果是，那么我们很好，如果不是，那么我们关闭下拉菜单。

<script>
export default {
  data() {
    return {
      openDropdown: false,
    };
  },
  created() {
    document.addEventListener("click", (e) => {
      let me = false;
      for (let index = 0; index < e.path.length; index++) {
        const element = e.path[index];

        if (element.id == "dropdown") {
          me = true;
          return;
        }
      }

      if (!me) this.openDropdown = false;
    });
  }
};
</script>

我很确定如果你有很多嵌套元素，这会带来性能问题，但我发现这是最懒惰的方式。

Answer 32

现在你应该为此使用 vue-click-outside 插件。

1. 当您在 div 外部单击时，您可以 运行 一个事件。

   NPM 插件：https://www.npmjs.com/package/v-click-outside

Answer 33

对于使用 Vue 3 的用户。

Vue3 更改了指令挂钩的语法：

• 绑定 -> beforeMount
• 解除绑定 -> 卸载

在 Vue 3 中检测元素外的点击：

click-outside.js

export default function directive(app) {
  // you can name the directive whatever you want. -> click-outside
  app.directive('click-outside', {
    beforeMount(el, binding) {
      el.clickOutsideEvent = (evt) => {
        evt.stopPropagation();
        if (!(el === evt.target || el.contains(evt.target))) {
          binding.value(evt, el);
        }
      };
      window.requestAnimationFrame(() => {
        document.addEventListener("click", el.clickOutsideEvent);
      });
    },
    unmounted(el) {
      document.removeEventListener("click", el.clickOutsideEvent);
    },
  })
}

注册指令：

main.js

import { createApp } from "vue";
import App from "./App.vue";

// Import your directive, in order to register it.
import clickOutside from "./directives/click-outside.js"

createApp(App).use(clickOutside).mount("#app");

用法：

<template>
  <div class="dropdown" v-click-outside="() => hideDropdown()"></div>
</template>
<script setup>
  function hideDropdown() {
    console.log("close dropdown")
  }
</script>

### OR 

<script>
  methods: {
    hideDropdown() {
      console.log("close dropdown")
    }
  }
</script>