解決問(wèn)題：TreeSelect組件初次點(diǎn)擊面板消失
結(jié)合TreeSelect組件 alwaysOpen 屬性

<template>
    <div>
        <div class="show" v-show="show" v-clickoutside="handleClose">
            顯示
        </div>
    </div>
</template>
 
<script>
const clickoutside = {
    // 初始化指令
    bind(el, binding, vnode) {
        function documentHandler(e) {
            // 這里判斷點(diǎn)擊的元素是否是本身，是本身，則返回
            if (el.contains(e.target)) {
                return false;
            }
            // 判斷指令中是否綁定了函數(shù)
            if (binding.expression) {
                // 如果綁定了函數(shù) 則調(diào)用那個(gè)函數(shù)，此處binding.value就是handleClose方法
                binding.value(e);
            }
        }
        // 給當(dāng)前元素綁定個(gè)私有變量，方便在unbind中可以解除事件監(jiān)聽(tīng)
        el.__vueClickOutside__ = documentHandler;
        document.addEventListener('click', documentHandler);
    },
    update() {},
    unbind(el, binding) {
        // 解除事件監(jiān)聽(tīng)
        document.removeEventListener('click', el.__vueClickOutside__);
        delete el.__vueClickOutside__;
    },
};
export default {
    name: 'HelloWorld',
    data() {
        return {
            show: true,
        };
    },
    directives: {clickoutside},
    methods: {
        handleClose(e) {
            this.show = false;
        },
    },
};
</script>
 
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.show {
    width: 100px;
    height: 100px;
    background-color: red;
}
</style>

參考文章：https://blog.csdn.net/heynewbie/article/details/106883412