vue3中setup语法糖下通用的分页插件实例详解

<script setup lang="ts">
// total ：用来传递数据总条数
// pageSize ：每页展示几条数据
// currentPage ：当前默认页码
// change-page ：页码改变时触发的事件，参数为当前页码

const props = defineProps({
  //数据总条数
  total: {
    type: Number,
    default: 88
  },
  //页面大小
  pageSize: {
    type: Number,
    default: 16
  },
  //当前显示的页码
  currentPage: {
    type: Number,
    default: 1
  }
});

let currentNum = ref(props.currentPage);

import {computed, ref} from 'vue'

// 页码显示组合
// 计算总页数
const pages = computed(() => Math.ceil(props.total / props.pageSize ));

const list = computed(() => {
  const result = []
  // 总页数小于等于5页的时候
  if (pages.value <= 5) {
    for (let i = 1; i <= pages.value; i++) {
      result.push(i)
    }
  } else {
    // 总页数大于5页的时候
    // 控制两端的省略号的有无，页码的显示个数与选中页码居中
    if (currentNum.value <= 2) {
      for (let i = 1; i <= 5; i++) {
        result.push(i)
      }
    } else if (currentNum.value >= 3 && currentNum.value <= pages.value - 2) {
      for (let i = currentNum.value - 2; i <= currentNum.value + 2; i++) {
        result.push(i)
      }
    } else if (currentNum.value > pages.value - 2) {
      for (let i = pages.value - 4; i <= pages.value; i++) {
        result.push(i)
      }
    }
  }
  return result;
})

const emit = defineEmits(["changePage"])
function changePage(type) {
  // 点击上一页按钮
  if (type === false) {
    if (currentNum.value <= 1)
      return
    currentNum.value -= 1
  } else if (type === true) {
    // 点击下一页按钮
    if (currentNum.value >= pages.value)
      return
    currentNum.value += 1
  } else {
    // 点击页码
    currentNum.value = type
  }
  emit('changePage',currentNum.value);
}
</script>

<template>
  <div class="my-pagination">
    <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  :class="{ disabled: currentNum === 1 }" @click="changePage(false)">上一页</a>
    <span v-if="currentNum > 3">...</span>
    <a
        href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow" 
        v-for="item in list"
        :key="item"
        :class="{ active: currentNum === item }"
        @click="changePage(item)"
    >{{ item }}</a>
    <span v-if="currentNum < pages - 2">...</span>
    <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  :class="{ disabled: currentNum === pages }" @click="changePage(true)">下一页</a>
  </div>
</template>

<style scoped lang="less">
.my-pagination {
  display: flex;
  justify-content: center;
  padding: 30px;

  > a {
    display: inline-block;
    padding: 5px 10px;
    border: 1px solid #e4e4e4;
    border-radius: 4px;
    margin-right: 10px;

    &:hover {
      color: #27BA9B;
    }

    &.active {
      background: #27BA9B;
      color: #fff;
      border-color: #27BA9B;
    }

    &.disabled {
      cursor: not-allowed;
      opacity: 0.4;

      &:hover {
        color: #333;
      }
    }
  }

  > span {
    margin-right: 10px;
  }
}
</style>

<script setup lang="ts">
import PagePlugin from "@/components/PagePlugin.vue";

function changePage(currentPage){
  // alert(currentPage)
  console.log(currentPage)
}
</script>

<template>
  <!--分页-->
  <PagePlugin
      :total="total"
      :pagesize="pageSize"
      :currentPage="pageNum"
      @change-page="changePage"/>
</template>

import {createRouter, createWebHashHistory} from 'vue-router'
import Father from '../views/Father.vue'

const routes = [
    {
        path: '/',
        name: "Father",
        component: Father
    },
    {
        path: '/Son',
        name: 'Son',
        component: () => import('../views/Son.vue')
    }
]
const router = createRouter({
    history: createWebHashHistory(),
    routes
})
export default router

<template>
  <h2>父组件</h2>
  <hr>
  <Son :num="num" :arr="array" ></Son>
</template>

<script lang="ts" setup>
import {ref} from 'vue'
import Son from "./Son.vue";

let num = ref(6688)
let array = ref([11, 22, 33, 44])
</script>

<template>
  <h2>子组件</h2>
  {{props.num}}--{{props.arr}}
</template>

<script lang="ts" setup>
let props = defineProps({
  num: Number,
  arr: {
    type: Array,
    default: () => [1, 2, 3, 4]
  }
})
</script>

<template>
  <h2>子组件</h2>
  <button @click="sendMsg">向父组件传递数据</button>
</template>

<script lang="ts" setup>
import {ref} from 'vue'

const emit = defineEmits(["son_sendMsg"]);
const msg = ref("子组件传递给父组件的数据")

function sendMsg() {
  emit("son_sendMsg", msg.value)
}
</script>

<template>
  <h2>父组件</h2>
  {{ message }}
  <hr>
  <Son @son_sendMsg="fun"></Son>
</template>

<script lang="ts" setup>
import {ref} from 'vue'
import Son from "./Son.vue"

let message = ref("")
function fun(msg) {
  message.value = msg
}
</script>