前言

最近在做vue移动端项目，需要做一个可以固定表头首列的表格，而且由于一些原因不能使用任何UI插件，网上找了很久也没什么好方法，所以在解决了问题之后，写下了这篇文章供后来人参考，文章有什么错漏的问题欢迎评论交流。

效果

思路

要实现固定首行首列
除了使用各种UI框架插件外，那就是自己用原生写啦
首先我们理一下思路
如何固定首行首列呢？
可能每个人有不同的想法
我这里当然介绍的是我自己的想法
那就是把首列表头和表格主内容分割开来，如下图
不过这样虽然固定了表头首列
但还是不能实现我们想要的效果
因为你会发现当你滑动tbody的时候
表头和首列并不会移动
相信聪明的你已经有了解决的办法了
那就是给tbody添加一个滑动监听
滑动的时候会触发事件
引起表头和首列的移动
这就是本文固定表头首列的思路

代码实现

template:

Copy<template>
    <div class="pages" ref="pages">
        <div class = "content" ref="table">
            <!--首列固定-->           
            <div class = "left-content">                 
                 <div class = "table-head"> 
                      <table class= "full-table">
                            <thead>
                                <tr v-for = "header in tableHeader">
                                    <th class = "firstCol" 
                                        v-for = "(b,index) in header" 
                                        v-if="index==0">
                                        <p>{{b}}</p>
                                  </th>
                                </tr>
                            </thead> 
                      </table>
                  </div>
                  <div class="table-left">
                      <div class = "table"
                           ref="firstColLayer"
                           data-_ref="firstColLayer"
                           >
                         <table class= "full-table"> 
                            <tbody>
                                <tr v-for="row in dataSheet">
                                    <td v-for="(c,index) in row" v-if="index==0">
                                        <p>{{c}}</p>
                                    </td>
                                </tr>
                            </tbody>
                         </table>
                      </div>
                  </div> 
            </div>
            <div class = "right-content" ref="right">
                <!--首行固定-->
                <div class = "table-head"
                     ref="firstRowLayer"
                     data-_ref="firstRowLayer">
                     <table class= "full-table">
                        <thead>
                            <tr v-for = "header in tableHeader">
                                <th
                                    v-for = "(b,index) in header" 
                                    v-if="index!=0 && index!=1"
                                    style="width:101px"
                                    >
                                    <p>{{b}}</p>
                              </th>
                            </tr>
                        </thead>
                     </table>
                </div>
                <!--正常表格内容(只有表格内容，没有表头和首列)-->
                <div class="table"
                     style="overflow:scroll"
                     ref="tableContainer"
                     @scroll="tableDivScroll($event)"
                     >
                    <table class="content-table">
                        <tbody ref="tbody">
                            <tr v-for="row in dataSheet">
                                <td v-for="(c,index) in row"
                                    v-if="index!=0 && index!=1"
                                    >
                                  <p>{{c}}</p>
                                </td>
                            </tr>
                        </tbody>
                    </table>
                </div>
            </div>
        </div> 
    </div></template>

JavaScript:

Copy<script>
    module.exports = (function(that) {        return {            data: function(that) {                const tableHeader = that.dataSheet;                const dataSheet = that.dataSheet;                return {                    dataSheet: dataSheet,                    tableHeader: tableHeader,
                };
            },            methods: {
                tableDivScroll (event) {                    const $target = this.$refs.tableContainer                    // 首行固定
                    this.$refs.firstRowLayer.scrollLeft = $target.scrollLeft                    // 首列固定
                    this.$refs.firstColLayer.scrollTop = $target.scrollTop
                },            //定一个生命周期钩子监听变动
            mounted:function () {                let maxHeight = window.screen.height                document.body.style.overflow='hidden';                this.$refs.right.style.width=""+this.$refs.table.offsetWidth-107+"px";//这里的减107是减去左侧div宽度
                console.log(this.placeholderTop)
            }
        }
    })(this);</script>

CSS:

Copy<style scoped>
    body{        overflow:hidden
    }    .pages{        height:100%;        overflow:hidden;
    }    .content{        margin-top:73px;        margin-left:17px;        width:100%;
    }    .left-content{        width:101px;        float:left;
    }    .right-content{        float:left
    }    .table-body{        width:100%;        overflow:auto;
    }    .table-head{        width:100%;        overflow:hidden;
    }    .left-content .table-body{        overflow:hidden;
    }    .table-left .table{        height:400px;        background-color:#FFFFFF;        overflow:hidden;        margin-right:0;        padding-right:0;
    }    table::-webkit-scrollbar{display:none}    .content-table th, .full-table th{        font-size:14px;        font-family:PingFangSC-Regular;        background:#EAEFF3;        font-weight:400;        color:#176BED;        height:40px;        line-height:40px;        text-align:center;
    }    .content-table td, .full-table td {        line-height: 35px;        text-align: center;        word-wrap: break-word;        word-wrap: normal