封装elementUI pagination 组件

组件完整代码：

<template>
  <div :class="{'hidden':hidden}" class="pagination-container">
    <el-pagination
      :background="background"
      :current-page.sync="currentPage"
      :page-size.sync="pageSize"
      :layout="layout"
      :page-sizes="pageSizes"
      :total="total"
      v-bind="$attrs"
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
    />
  </div>
</template>

<script>
import { scrollTo } from '@/utils/scroll-to'

export default {
  name: 'Pagination',
  props: {
    total: {
      required: true,
      type: Number
    },
    page: {
      type: Number,
      default: 1
    },
    limit: {
      type: Number,
      default: 20
    },
    pageSizes: {
      type: Array,
      default() {
        return [10, 20, 30, 50]
      }
    },
    layout: {
      type: String,
      default: 'total, sizes, prev, pager, next, jumper'
    },
    background: {
      type: Boolean,
      default: true
    },
    autoScroll: {
      type: Boolean,
      default: true
    },
    hidden: {
      type: Boolean,
      default: false
    }
  },
  computed: {
    currentPage: {
      get() {
        return this.page
      },
      set(val) {
        this.$emit('update:page', val)
      }
    },
    pageSize: {
      get() {
        return this.limit
      },
      set(val) {
        this.$emit('update:limit', val)
      }
    }
  },
  methods: {
    handleSizeChange(val) {
      this.$emit('pagination', { page: this.currentPage, limit: val })
      if (this.autoScroll) {
        scrollTo(0, 800)
      }
    },
    handleCurrentChange(val) {
      this.$emit('pagination', { page: val, limit: this.pageSize })
      if (this.autoScroll) {
        scrollTo(0, 800)
      }
    }
  }
}
</script>

<style scoped>
.pagination-container {
  background: #fff;
  padding: 32px 16px;
}
.pagination-container.hidden {
  display: none;
}
</style>

scrollTo 方法是在页码切换时让页面滚动条回到顶部，代码如下：

Math.easeInOutQuad = function(t, b, c, d) {
    t /= d / 2
    if (t < 1) {
      return c / 2 * t * t + b
    }
    t--
    return -c / 2 * (t * (t - 2) - 1) + b
  }
  
  // requestAnimationFrame for Smart Animating http://goo.gl/sx5sts
  var requestAnimFrame = (function() {
    return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || function(callback) { window.setTimeout(callback, 1000 / 60) }
  })()
  
  /**
   * 检测到滚动元素，只要移动它们就行了
   * @param {number} amount
   */
  function move(amount) {
    document.documentElement.scrollTop = amount
    document.body.parentNode.scrollTop = amount
    document.body.scrollTop = amount
  }
  
  function position() {
    return document.documentElement.scrollTop || document.body.parentNode.scrollTop || document.body.scrollTop
  }
  
  /**
   * @param {number} to
   * @param {number} duration
   * @param {Function} callback
   */
  export function scrollTo(to, duration, callback) {
    const start = position()
    const change = to - start
    const increment = 20
    let currentTime = 0
    duration = (typeof (duration) === 'undefined') ? 500 : duration
    var animateScroll = function() {
      // 增加时间
      currentTime += increment
      // 用二次输入输出函数求值
      var val = Math.easeInOutQuad(currentTime, start, change, duration)
      // 执行滚动行为
      move(val)
      // 执行动画，直到滚动行为结束
      if (currentTime < duration) {
        requestAnimFrame(animateScroll)
      } else {
        if (callback && typeof (callback) === 'function') {
          // 动画结束后的回调函数
          callback()
        }
      }
    }
    animateScroll()
  }
  

使用组件：

<pagination
      v-show="total>0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

由于分页组件使用频繁，可以直接作为全局组件引入。