vue分页组件

<template>
  <div class="pagination">
    <!-- 上 -->
    <button :disabled="pageNo==1" @click="selectPage(pageNo-1)">上一页</button>

    <button
      v-show="startAndEnd.start!=1  && total>0"
      @click="selectPage(1)"
      :class="{active:pageNo==1}"
    >1</button>

    <button v-show="startAndEnd.start>2">···</button>

    <!-- 中间部分 -->
    <!-- {{continuesPages}} -->
    <button
      v-for="(page,idx) in continuesPages"
      :key="idx"
      @click="selectPage(page)"
      :class="{active:pageNo==page}"
    >{{page}}</button>

    <!-- 下 -->
    <button v-show="startAndEnd.end < totalPage - 1">···</button>

    <button
      v-show="startAndEnd.end != totalPage"
      @click="selectPage(totalPage)"
      :class="{active:pageNo==totalPage}"
    >{{totalPage}}</button>

    <button :disabled="pageNo==totalPage" @click="selectPage(pageNo + 1)">下一页</button>

    <button>共 {{total}} 条</button>
  </div>
</template>

<script>
export default {
  name: "Pagination2",
  props: ["pageNo", "pageSize", "total", "continues"],
  methods: {
    selectPage(pageNo) {
      if (pageNo != this.pageNo) {
        this.$emit("selectPage", pageNo);
      }
    },
  },
  computed: {
    totalPage() {
      return Math.ceil(this.total / this.pageSize);
    },
    startAndEnd() {
      const { pageNo, pageSize, total, continues, totalPage } = this;
      let start = 0,
        end = 0;

      // 总页码数 小于或等于 须连续的页码数
      if (totalPage <= continues) {
        start = 1;
        end = totalPage;
      } else {
        // 总页码数 大于 须连续的页码数
        let diff = Math.floor(continues / 2);
        console.log("diff", diff);
        console.log(pageNo, pageSize, total, continues, totalPage);
        // 边界位置处理
        if (pageNo - diff < 1) {
          start = 1;
          end = continues;
        } else if (pageNo + diff > totalPage) {
          start = totalPage - continues + 1;
          end = totalPage;
        } else {
          start = pageNo - diff;
          end = pageNo + diff;
        }
      }
      return {
        start,
        end,
      };
    },
    continuesPages() {
      // start肯定不等于end
      const { start, end } = this.startAndEnd;
      console.log(this.startAndEnd);
      let pages = [];

      for (let i = start; i <= end; i) {
        pages.push(i);
        i++;
      }

      return pages;
    },
  },
};
</script>

<style lang="less" scoped>
.pagination {
  text-align: center;
  button {
    margin: 0 5px;
    background-color: #f4f4f5;
    color: #606266;
    outline: none;
    border-radius: 2px;
    padding: 0 4px;
    vertical-align: top;
    display: inline-block;
    font-size: 13px;
    min-width: 35.5px;
    height: 28px;
    line-height: 28px;
    cursor: pointer;
    box-sizing: border-box;
    text-align: center;
    border: 0;

    &[disabled] {
      color: #c0c4cc;
      cursor: not-allowed;
    }

    &.active {
      // cursor: not-allowed;
      background-color: #409eff;
      color: #fff;
    }
  }
}
.active {
  background: skyblue;
}
</style>