先给大家介绍下vue3中setup语法糖下通用的分页插件,内容如下所示:
效果
自定义分页插件:PagePlugin.vue
<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>
使用插件
<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>
vue3中setup语法糖下父子组件之间的通信
准备工作
在router文件夹中创建index.ts文件:
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
父传子:
第一步:Father.vue
<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>
第二步:Sun.vue
<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>
子传父:
第一步:Sun.vue
<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>
第二步:Father.vue:
<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>
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