學習了vue.js一段時間，拿它來做2個小組件，練習一下。
我這邊是用webpack進行打包，也算熟悉一下它的運用。
源碼放在文末的 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> 文章內(nèi)容... </article> <div id='main'> <app></app> </div> </div> <script type="text/javascript" src='bundle.js'></script></body></html>我將 app這個組件放在 <div id='main'></div> 內(nèi)
通過webpack打包后,入口的js文件是entry.js，用來引入app.vue組件
entry.js
let Vue = require('vue');import App from './components/app';let app_vue = new Vue({ el: '#main', components: { app: App }});接下來看下這個app組件
<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個子組件，分別是comment.vue和page.vue，通過動態(tài)綁定數(shù)據(jù)，進行父子間組件通信，我是這樣認為的，對于 當前在第幾頁 應當由 page.vue傳遞給app.vue，所以這里我們使用 雙向綁定,其余的如 params, url, isSync，即向后臺請求數(shù)據(jù)的東西以及是否同步或異步操作<當然，這里我還沒有測試過后臺數(shù)據(jù)，目前是直接js生成靜態(tài)數(shù)據(jù)>。
接下來,看下comment.vue評論組件
<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 }} 條評論</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>這里的 getData.js 將在下面提到，是我們獲取數(shù)據(jù)的位置。
loading: 本意是在跳轉(zhuǎn)頁碼加載評論時，對于當前評論加載0.5的透明度的遮罩，然后ajax通過它的回調(diào)函數(shù)來取消遮罩，現(xiàn)在這樣就不能實現(xiàn)了，只能強行寫下，然而是沒有用的..
hasComment: comment組件第一次加載的時候，我們就去請求獲得總共的數(shù)據(jù)長度，如果沒有數(shù)據(jù)，則不顯示comment組件布局內(nèi)容
?curPageIndex?: 通過父組件app傳遞下來，使用的是props
這些數(shù)據(jù)，我們都設置一個默認值與類型比較好。
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>主要是個對于 組件事件的運用，=最常見的click事件，以及class與style的綁定，根據(jù) curPageIndex與this.pageIndex來比較，判斷是否擁有這個class,通過computed計算屬性，來獲得 頁碼數(shù)組 因為會根據(jù)當前頁 有所變化，created的時候 計算出總頁碼。
最后一個是 目前生成獲取靜態(tài)數(shù)據(jù)的js文件.
// let data = {// avatar: '', 頭像// name: '', 用戶名// context: '', 評論內(nèi)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);}就這樣了吧。
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