学习了vue.js一段时间，拿它来做2个小组件，练习一下。
我这边是用webpack进行打包，也算熟悉一下它的运用。
源码放在文末的 github 地址上。
首先是index.html
<!DOCTYPE html><html><head> <title>Page</title> <style type="text/css"> * { margin: 0; padding: 0; font-family: 'Open Sans', Arial, sans-serif; } .contianer { width: 50%; height: auto; margin: 20px auto; } article { margin-bottom: 50px; } </style></head><body> <div class='contianer'> <article> 文章内容... </article> <div id='main'> <app></app> </div> </div> <script type="text/javascript" src='bundle.js'></script></body></html>我将 app这个组件放在 <div id='main'></div> 内
通过webpack打包后,入口的js文件是entry.js，用来引入app.vue组件
entry.js
let Vue = require('vue');import App from './components/app';let app_vue = new Vue({ el: '#main', components: { app: App }});接下来看下这个app组件
<style type="text/css" scoped> </style><template> <comment :cur-page-index="curPageIndex" :each-page-size="eachPageSize" :comment-url="commentUrl" :comment-params="commentParams" :comment-is-sync="commentIsSync"> </comment> <page :cur-page-index.sync="curPageIndex" :each-page-size="eachPageSize" :page-url="pageUrl" :page-params="pageParams" :page-is-sync="pageIsSync"> </page></template> <script type="text/javascript"> import Comment from './comment'; import Page from './page'; export default { data () { return { curPageIndex: 1, eachPageSize: 7, } }, components: { comment: Comment, page: Page }, }</script>它有2个子组件，分别是comment.vue和page.vue，通过动态绑定数据，进行父子间组件通信，我是这样认为的，对于 当前在第几页 应当由 page.vue传递给app.vue，所以这里我们使用 双向绑定,其余的如 params, url, isSync，即向后台请求数据的东西以及是否同步或异步操作<当然，这里我还没有测试过后台数据，目前是直接js生成静态数据>。
接下来,看下comment.vue评论组件
<style type="text/css" scoped> .comt-mask { opacity: 0.5; } .comt-title { } .comt-line { width: 100%; height: 2px; background-color: #CCC; margin: 10px 0; } .comt-wrap { } .comt-user { float: left; } .comt-img { width: 34px; height: 34px; border-radius: 17px; } .comt-context { margin: 0 0 0 60px; } .comt-name { color: #2B879E; margin-bottom: 10px; font-size: 18px; }</style><template> <div v-if="hasComment" :class="{'comt-mask': loading}"> <h3 class='comt-title'>{{ totalCommentCount }} 条评论</h3> <div class="comt-line"></div> <div class="comt-wrap" v-for="comment of commentArr"> <div class="comt-user"> <img src='{{ comment.avatar }}' class="comt-img"/> </div> <div class="comt-context"> <p class="comt-name">{{ comment.name }}</p> <p> {{ comment.context }} </p> </div> <div class="comt-line"></div> </div> </div></template><script type="text/javascript"> import {getCommentData, getTotalCommentCount} from './getData'; export default { props: { curPageIndex: { type: Number, default: 1, }, eachPageSize: { type: Number, default: 7, }, commentUrl: { type: String, default: '', }, commentParams: { type: Object, default: null, }, commentIsSync: { type: Boolean, default: true, }, }, data () { return { totalCommentCount: 0, hasComment: false, loading: true, } }, computed: { commentArr () { this.loading = true; let res = getCommentData(this.commentUrl, this.commentParams, this.commentIsSync, this.curPageIndex, this.eachPageSize); this.loading = false; return res; }, }, created () { let cnt = getTotalCommentCount(this.commentUrl, this.commentParams); this.totalCommentCount = cnt; this.hasComment = cnt > 0; } }</script>这里的 getData.js 将在下面提到，是我们获取数据的位置。
loading: 本意是在跳转页码加载评论时，对于当前评论加载0.5的透明度的遮罩，然后ajax通过它的回调函数来取消遮罩，现在这样就不能实现了，只能强行写下，然而是没有用的..
hasComment: comment组件第一次加载的时候，我们就去请求获得总共的数据长度，如果没有数据，则不显示comment组件布局内容
・curPageIndex・: 通过父组件app传递下来，使用的是props
这些数据，我们都设置一个默认值与类型比较好。
page.vue
<style type="text/css" scoped> .page { text-align: center; margin: 30px; } .page-btn { color: gray; background-color: white; border: white; width: 30px; height: 30px; margin: 5px; font-size: 18px; outline: none; } .page-btn-link { cursor: Crosshair; } .page-btn-active { border: 1px solid gray; border-radius: 15px; }</style><template> <div class="page"> <button v-for="pageIndex of pageArr" track-by='$index' :class="{'page-btn': true, 'page-btn-active': this.curPageIndex === pageIndex, 'page-btn-link': checkNum(pageIndex)}" @click="clickPage(pageIndex)" > {{ pageIndex }} </button> </div></template><script type="text/javascript"> import {getTotalPageCount} from './getData'; export default { props: { totalPageCount: { type: Number, default: 0, }, curPageIndex: { type: Number, default: 1, }, eachPageSize: { type: Number, default: 7, }, pageAjcn: { type: Number, default: 4, }, pageUrl: { type: String, default: '', }, pageParams: { type: Object, default: null, }, pageIsSync: { type: Boolean, default: true, } }, data () { return { } }, computed: { pageArr () { let st = 1, end = this.totalPageCount, cur = this.curPageIndex, ajcn = this.pageAjcn, arr = [], left = Math.floor(ajcn / 2), right = ajcn - left; if (end == 0 || cur == 0) { return arr; } else { console.log(st, end, cur, left, right); arr.push(st); console.log(st+1, cur-left); if (st + 1 < cur - left) { arr.push('...'); } for (let i = Math.max(cur - left, st + 1); i <= cur - 1; ++i) { arr.push(i); } if (cur != st) { arr.push(cur); } for (let i = cur + 1; i <= cur + right && i <= end - 1 ; ++i) { arr.push(i); } if (cur + right < end - 1) { arr.push('...'); } if (end != cur) { arr.push(end); } return arr; } } }, methods: { clickPage (curIndex) { if (Number.isInteger(curIndex)) { this.curPageIndex = curIndex; } }, checkNum (curIndex) { return Number.isInteger(curIndex); } }， created () { this.totalPageCount = getTotalPageCount(this.pageUrl, this.pageParams, this.pageIsSync, this.eachPageSiz); } }</script>主要是个对于 组件事件的运用，=最常见的click事件，以及class与style的绑定，根据 curPageIndex与this.pageIndex来比较，判断是否拥有这个class,通过computed计算属性，来获得 页码数组 因为会根据当前页 有所变化，created的时候 计算出总页码。
最后一个是 目前生成获取静态数据的js文件.
// let data = {// avatar: '', 头像// name: '', 用户名// context: '', 评论内容// }let dataArr = [];function randomStr (len) { return Math.random().toString(36).substr(len);}function initData () { for (var i = 0; i<45 ; ++i) { let _avator = "./resources/" + i%7 + ".jpg"; let _name = randomStr(20); let _context = randomStr(2); dataArr.push({ avatar: _avator, name: _name, context: _context }); }}if (!dataArr.length) { initData();}export function getCommentData (url = '', params = null, isSync = true, curPageIndex = 1, eachPageSize = 7) { /* ajax */ let st = (curPageIndex - 1) * eachPageSize; let end = st + eachPageSize; return dataArr.slice(st, end);}export function getTotalCommentCount(url = '', params = null, isSync = true) { /* ajax */ return dataArr.length;}export function getTotalPageCount(url = '', params = null, isSync = true, eachPageSize = 7) { /* ajax */ return Math.floor((dataArr.length + eachPageSize -1 ) / eachPageSize);}就这样了吧。
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