Vue3实现自定义指令拦截点击事件的示例代码

// main.ts // 举例案例 直接在初始化为全局自定义指令
import { createApp } from "vue";
import "./style.css";
import App from "./App.vue";
import router from "./router/router";
import * as echarts from 'echarts';
import ElementPlus from 'element-plus';
import 'element-plus/dist/index.css';

const app = createApp(App);
app.use(router);
app.use(ElementPlus)

// 逻辑封装
const customClick = (binding: any) => {
    return () =>{
        if (true) { // 判断条件
            // 正常触发点击事件
            binding.value();
        } else {
            // 已经成功拦截点击事件
            console.log('已经成功拦截点击事件');
        };
    };
};
// 全局自定义指令
app.directive('custom',{
    created(el, binding, vnode, prevVnode) {
        el.addEventListener('click', customClick(binding));
    },
    // 离开一定要销毁卸载
    unmounted(el, binding, vnode) {
        el.removeEventListener('click', customClick);
    },
});

app.mount("#app");

<template>
<!--函数不带括号-->
<button v-custom="onClick">test按钮</button>
<el-button type="primary" v-custom="onClickTest1">Primary</el-button>

<!--函数带括号 可传值-->
<button v-custom="() => onClick()">test按钮</button>
<el-button type="primary" v-custom="() => onClickTest1(233)">Primary</el-button>
</template>

<script lang="ts" setup >
const onClick = () => {
    console.log('_____函数不带括号');
};

const onClickTest1 = (num: number) => {
    console.log('_____函数带括号 可传值');
};
</script>