js实现跨浏览器tab选项卡页通信、传参，监听localStorage.变量的实时变化，实现打开多个浏览器页面窗口相互可以传参通信

<template>
    <el-button type="primary" @click="ls(++i)">修改localStorage的变量为{{ i }}</el-button>
</template>
<script>
export default {
    data() { return { i: 0 } },
    created() {
        //监听localStorage的变化
        onstorage = (e) => {
            if (e.key === '被监听的变量') {
                this.i = e.newValue;//同步监听后的值
                console.log(e.key, e.newValue);
            }
        };
    },
    methods: {
        ls(d) {
            localStorage.被监听的变量 = d;//修改localStorage的变量
        },
    },
};
</script>