vue里盒子高度随浏览器高度变化而变化_beforedestroy里off(window, "resize", this.init)报错-优快云博客

本文链接：https://blog.youkuaiyun.com/Calvin_qiang/article/details/119610492

这篇博客介绍了如何在Vue应用中封装addEventListener和removeEventListener来实现事件绑定和解绑。具体场景是在组件的mounted和beforeDestroy生命周期钩子中，分别调用on和off方法来监听和移除window的resize事件，从而实现表格高度根据窗口大小动态调整的功能。此外，还展示了如何在methods中定义resize方法来计算表格的高度。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

a.封装绑定事件和解绑事件

/**
 * @description 绑定事件 on(element, event, handler)
 */
export const on = (function () {
  if (document.addEventListener) {
    return function (element, event, handler) {
      if (element && event && handler) {
        element.addEventListener(event, handler, false)
      }
    }
  } else {
    return function (element, event, handler) {
      if (element && event && handler) {
        element.attachEvent('on' + event, handler)
      }
    }
  }
})()

/**
 * @description 解绑事件 off(element, event, handler)
 */
export const off = (function () {
  if (document.removeEventListener) {
    return function (element, event, handler) {
      if (element && event) {
        element.removeEventListener(event, handler, false)
      }
    }
  } else {
    return function (element, event, handler) {
      if (element && event) {
        element.detachEvent('on' + event, handler)
      }
    }
  }
})()

b.在vue文件里引入刚封装的绑定和解绑（引入监听方法）

import { on, off } from '@/libs/tools'

c.在methods里添加方法，如下

<template>
    <div class="bodyDiv" ref="bodyDiv">
        <div class="searchDiv" ref="searchDiv">
            <Form :model="formInline" inline>
                
            </Form>
        </div>
        <div class="tableDiv">
            <Table :columns="columns1" :data="data1" :height="bodyHeight "></Table>
        </div>
    </div>
</template>

<script>
    import { on, off } from '@/libs/tools';
    export default {
        data(){
            return {
                formInline: {},
                bodyHeight: 0,
                columns1: [
                    {
                        title: 'Name',
                        key: 'name'
                    },
                    {
                        title: 'Age',
                        key: 'age'
                    },
                    {
                        title: 'Address',
                        key: 'address'
                    }
                ],
                data1: [
                    {
                        name: 'John Brown',
                        age: 18,
                        address: 'New York No. 1 Lake Park',
                        date: '2016-10-03'
                    },
                    {
                        name: 'Jim Green',
                        age: 24,
                        address: 'London No. 1 Lake Park',
                        date: '2016-10-01'
                    },
                    {
                        name: 'Joe Black',
                        age: 30,
                        address: 'Sydney No. 1 Lake Park',
                        date: '2016-10-02'
                    },
                    {
                        name: 'Jon Snow',
                        age: 26,
                        address: 'Ottawa No. 2 Lake Park',
                        date: '2016-10-04'
                    }
                ]
            }
        },
        methods: {
            initPage(){
                //这里调数据
            },
            resize(){
                this.bodyHeight = this.$refs.bodyDiv.offsetHeight - this.$refs.searchDiv.offsetHeight - 20 - 10 - 20;
            }
        },
        mounted(){
            this.$nextTick(() => {
                this.resize();
                on(window, "resize", this.resize)
                this.initPage(); //初始化页面
            })
        },
        beforeDestroy(){
            off(window, 'resize', this.resize)
        }
    }
</script>

<style lang="less">
    .bodyDiv{
        width: 100%;
        height: 100%;
        background: #dedede;
        color: #000;
    }
    .searchDiv{
        padding: 10px;
        margin-bottom: 10px;
        background: #fff;
    }
    .tableDiv{
        background: #fff;
        padding: 10px;
    }
</style>