vue 自定义分页器

<template>
  <div class="page-wrapper clearfix">
    <div class="page-info fl">
      <span class="item-count h50">总共<span>{{totals}}</span>条，</span>
      <span class="h50"><span>{{totalPages}}</span>页</span>
    </div>
    <div class="page-tab fl clearfix">
      <button class="fl h50 cursor" :class="{canNot:currentPage==1}" @click="firstPage" :disabled='preDisabled'>首页</button>
      <button class="fl h50 cursor" :class="{canNot:currentPage==1}" @click="prePage" :disabled='preDisabled'>上一页</button>
      <ul class="fl">
        <li v-for="(item,index) in itemArr" :key="index" class="cursor" @click="changePage(item)" :class="{activePage:currentPage=== item}">{{item}}</li>
      </ul>
      <button class="fl h50 cursor" @click="nextPage" :class="{canNot:currentPage==totalPages}" :disabled='nextDisabled'>下一页</button>
      <button class="fl h50 cursor" :class="{canNot:currentPage==totalPages}" :disabled='nextDisabled' @click="lastPage">尾页</button>
    </div>
    <div class="items-choose fl clearfix">
      <span class="fl h50">每页</span>
      <div class="items-show fl" @click="handleChooseNumClick">
          <input v-model="pageNum" class="chooseNum"  @blur='blur' readonly>
        <div class="per-page-items">
          <!-- <input type="text" class="input-item-num"> -->
          <ul class="items-num" v-show="itemsShow">
            <li v-for='(item,index) in pageSizeSettings' :key='index' @click.stop='chooseNum(item)'>{{item}}</li>
          </ul>
        </div>
      </div>
    </div>
  </div>
</template>
<style>
  * {
    padding: 0;
    margin: 0;
  }

  ul, li {
    list-style: none;
  }

  .clearfix:after {
    content: '.';
    height: 0;
    display: block;
    visibility: hidden;
    clear: both;
    overflow: hidden;
  }

  .cursor {
    cursor: pointer;
  }

  .clearfix {
    zoom: 1;
  }

  .page-wrapper .fl {
    float: left;
  }
  .page-wrapper{
      font-size: 14px;
      color: #5E6470;
  }
  .h50 {
    display: inline-block;
    height: 30px;
    line-height: 30px;
    padding: 0 12px;
    border: 1px solid #EAEDF1;
  }

  .page-wrapper .page-tab li {
    float: left;
    width: 30px;
    height: 30px;
    text-align: center;
    line-height: 30px;
    border: 1px solid #EAEDF1;
    box-sizing: border-box;
  }

  .page-wrapper .page-info {
    margin-right: 6px;
  }

  .page-wrapper .page-info .h50 {
    border: none;
    padding: 0;
  }

  .items-choose .h50 {
    padding: 0;
    border: none 0;
    border-top: 1px solid #EAEDF1;
    border-bottom: 1px solid #EAEDF1;
    box-sizing: border-box;
    padding: 0 6px;
  }

  .items-choose .items-show {
    height: 30px;
    width: 74px;
    position: relative;
    box-sizing: border-box;
    border: 1px solid #EAEDF1;
    position: relative;
  }
 .items-choose .items-show input{
     height: 100%;
     width: 100%;
     text-align: center;
 }
  .items-choose .items-show:after {
    content: '';
    position: absolute;
    height: 0;
    border: 4px solid transparent;
    border-top: 6px solid #C4CCC5;
    top: 50%;
    right: 10px;
    transform: translate3d(-50, -50, 0);
    cursor: pointer;
  }

  .items-choose .items-num {
    width: 100%;
    position: absolute;
    bottom: 42px;
    border: 1px solid #EAEDF1;
    z-index: 100;
    background: #f5f7fa;
    z-index: 999;
  }

  .items-choose .items-num li {
    padding: 10px 0 10px 6px;
    font-size: 14px;
  }

  .items-choose .items-num li:hover {
    /*background: #1AB394;*/
    background: #4A8DF0;
    color: #fff;
  }

  .page-wrapper .activePage {
    color: #fff;
    /*background: #1AB394;*/
    background: #4A8DF0;
  }

  .canNot {
    cursor: not-allowed;
  }

  .page-wrapper button {
    background: #fff;
    font-size: 14px;
    color: #5E6470;
  }
  .chooseNum{
    cursor: pointer;
    font-size: 14px;
    color: #5E6470;
  }
</style>
<script>
export default {
    name: 'VuePagination',
    props: {
        pageSize: { // 每页显示数量
            default: 0,
            type: Number
        },
        totals: { // 总数
            default: 0,
            type: Number
        },
        tab: {
            type: Boolean,
            default: false
        },
        pageSizeSettings: { // 配置下拉 选pageSize
            type: Array,
            default () {
                return [5, 10, 15, 20];
            }
        }
    },
    data () {
        return {
            itemsShow: false, // 控制每页条数下拉框
            itemArr: [], // 显示页数,
            nextDisabled: null,
            preDisabled: 'disabled',
            totalPages: 1, // 默认页数
            currentPage: 1,
            size: this.pageSize // 获取每页数量
        };
    },
    computed: {
        pageNum () { // 由于父组件传递过来的属性 子组件的钩子里面不能直接使用 用计算属性代替接收
            let a = this.size;
            return a;
        },
        pageItems () {
            let b = this.totals;
            return b;
        }
    },
    created () {
        this.pages();
    },
    methods: {
        chooseNum (item) { // 改变pageSize
            this.itemsShow = false;
            this.size = item;
        },
        handleChooseNumClick () {
            this.itemsShow = !this.itemsShow;
        },
        blur () {
            var that = this;
            setTimeout(function () {
                that.itemsShow = false;
            }, 200);
        },
        changePage (page) { // 切换页数
            this.currentPage = page;
            this.pages();
        },
        nextPage () { // 下一页
            if (this.currentPage <= this.totalPages - 1) {
                this.currentPage++;
            }
        },
        prePage () { // 上一页
            if (this.currentPage > 1) {
                this.currentPage--;
            }
        },
        firstPage () { // 首页
            this.currentPage = 1;
        },
        lastPage () { // 尾页
            this.currentPage = this.totalPages;
        },
        pages () { // 页数改变的逻辑
            this.itemArr = []; // 每次改变得清空数组
            this.totalPages = Math.ceil(this.pageItems / this.pageNum);
            this.preDisabled = this.currentPage === 1 ? 'disabled' : null;
            this.nextDisabled = this.currentPage === this.totalPages ? 'disabled' : null;
            let start = this.currentPage - 2 > 1 ? this.currentPage - 2 : 1;
            let end = this.currentPage > 3 ? (this.totalPages - this.currentPage >= 2 ? this.currentPage + 2 : this.totalPages) : 5;
            start = this.totalPages - this.currentPage >= 2 ? start : end - 4;
            if (this.totalPages <= 5) {
                start = 1;
                end = this.totalPages;
            }
            for (let i = start;i <= end;i++) {
                this.itemArr.push(i);
            }
        }
    },
    watch: {
        pageNum () { // 每页数量变化后传递出 pageSize 重新请求数据
            this.currentPage = 1; // 改变每页数据 页码回到初始值
            this.pages();
            this.$emit('size-change', {
                pageSize: this.pageNum
            });
        },
        currentPage () { // 当前页数变化后 传递出当前页码 重新请求数据
            this.pages();
            this.$emit('current-change', {
                pageSize: this.pageNum,
                currentPage: this.currentPage
            });
        },
        totals () { // 数据是异步加载的 组件刚开始totals是默认的是渲染不了的
            this.pages();
        },
        tab () { // 点击切换条件筛选 重置currentPage
            this.currentPage = 1;
        }
    }
};
</script>

自定义