學習 NodeJS 6-商品列表模塊實現

6 商品列表模塊實現

6.1 商品列表組件拆分

<template>
  <div>
    <nav-header></nav-header>
    <nav-bread>
      <span> Goods </span>
    </nav-bread>
    <nav-footer></nav-footer>
  </div>
</template>

<script>
  import './../assets/css/base.css';
  import './../assets/css/product.css';
  import './../assets/css/login.css';
  import NavHeader from '@/components/NavHeader.vue';
  import NavFooter from '@/components/NavFooter.vue';
  import NavBread from "@/components/NavBread";

  export default {
    components:{
      NavBread,
      NavHeader,
      NavFooter,
    }
  }
</script>

• Header組件

<template>
  <header class="header">
    <symbol id="icon-cart" viewBox="0 0 38 32">
      <title>cart</title>
      <path class="path1" d="M37.759 0h-4.133c-0.733 0.004-1.337 0.549-1.434 1.255l-0.546 4.342c-0.081 0.484-0.496 0.849-0.997 0.849-0.005 0-0.009-0-0.014-0h-27.604c-0.003 0-0.007-0-0.011-0-1.674 0-3.031 1.357-3.031 3.031 0 0.34 0.056 0.666 0.159 0.971l2.52 8.062c0.385 1.194 1.486 2.043 2.785 2.043 0.126 0 0.25-0.008 0.372-0.023l22.983 0.002c0.515 0.131 0.626 0.768 0.626 1.283 0.005 0.044 0.009 0.095 0.009 0.146 0 0.501-0.294 0.933-0.718 1.134l-22.439 0.003c-0.354 0-0.642 0.287-0.642 0.642s0.287 0.642 0.642 0.642h22.745l0.131-0.071c0.919-0.392 1.551-1.287 1.551-2.33 0-0.058-0.002-0.116-0.006-0.173 0.021-0.108 0.033-0.24 0.033-0.376 0-1.072-0.732-1.973-1.724-2.23l-23.357-0.004c-0.063 0.008-0.135 0.013-0.209 0.013-0.719 0-1.332-0.455-1.566-1.093l-2.53-8.095c-0.048-0.154-0.076-0.332-0.076-0.515 0-0.973 0.782-1.764 1.752-1.778h27.657c1.159-0.004 2.112-0.883 2.232-2.011l0.547-4.345c0.010-0.083 0.078-0.147 0.161-0.152l4.133-0c0.354 0 0.642-0.287 0.642-0.642s-0.287-0.642-0.642-0.642z"></path>
      <path class="path2" d="M31.323 9.69c-0.022-0.003-0.048-0.004-0.074-0.004-0.328 0-0.598 0.248-0.633 0.567l-0.809 7.268c-0.003 0.022-0.004 0.048-0.004 0.074 0 0.328 0.248 0.598 0.567 0.633l0.074 0c0.001 0 0.003 0 0.004 0 0.327 0 0.596-0.246 0.632-0.563l0.809-7.268c0.003-0.022 0.004-0.048 0.004-0.074 0-0.328-0.248-0.598-0.567-0.633z"></path>
      <path class="path3" d="M27.514 25.594c-1.769 0-3.203 1.434-3.203 3.203s1.434 3.203 3.203 3.203c1.769 0 3.203-1.434 3.203-3.203s-1.434-3.203-3.203-3.203zM27.514 30.717c-1.060 0-1.92-0.86-1.92-1.92s0.86-1.92 1.92-1.92c1.060 0 1.92 0.86 1.92 1.92s-0.86 1.92-1.92 1.92z"></path>
      <path class="path4" d="M9.599 25.594c-1.769 0-3.203 1.434-3.203 3.203s1.434 3.203 3.203 3.203c1.769 0 3.203-1.434 3.203-3.203s-1.434-3.203-3.203-3.203zM9.599 30.717c-1.060 0-1.92-0.86-1.92-1.92s0.86-1.92 1.92-1.92c1.060 0 1.92 0.86 1.92 1.92s-0.86 1.92-1.92 1.92z"></path>
    </symbol>
    <div class="navbar">
      <div class="navbar-left-container">
        <a href="/">
          <img class="navbar-brand-logo" src="static/logo.png" />
        </a>
      </div>
      <div class="navbar-right-container" style="display: flex">
        <div class="navbar-menu-container">
          <!--<a href="/" class="navbar-link">我的賬戶</a>-->
          <span class="navbar-link"></span>
          <a href="javascript:void(0)" class="navbar-link">Login</a>
          <a href="javascript:void(0)" class="navbar-link">Logout</a>
          <div class="navbar-cart-container">
            <span class="navbar-cart-count"></span>
            <a class="navbar-link navbar-cart-link" href="/#/cart">
              <svg class="navbar-cart-logo">
                <use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-cart"></use>
              </svg>
            </a>
          </div>
        </div>
      </div>
    </div>
  </header>
</template>

• Footer組件

<template>
  <footer class="footer">
    <div class="footer__wrap">
      <div class="footer__secondary">
        <div class="footer__inner">
          <div class="footer__region">
            <span>Region</span>
            <select class="footer__region__select">
              <option value="en-US">USA</option>
              <option value="zh-CN">China</option>
              <option value="in">India</option>
            </select>
          </div>
          <div class="footer__secondary__nav">
            <span>Copyright © 2017 IMooc All Rights Reserved.</span>
            <a href="http://us.lemall.com/us/aboutUs.html">
              About Us
            </a>
            <a href="http://us.lemall.com/us/termsofUse.html">
              Terms &amp; Conditions
            </a>
            <a href="http://us.lemall.com/us/privacyPolicy.html">
              Privacy Policy
            </a>
          </div>
        </div>
      </div>
    </div>
  </footer>
</template>

• 麪包屑組件

<template>
  <div class="nav-breadcrumb-wrap">
    <div class="container">
      <nav class="nav-breadcrumb">
        <a href="/">Home</a>
        <slot></slot>
      </nav>
    </div>
  </div>
</template>

6.2 商品列表數據渲染實現

模擬mock數據，加載商品列表信息

坑：新的vue-cli創建應用已經沒有dev-server.js了，已經和webpack.dev.conf.js合併了，需要在如下操作去實現：

const express = require("express")
const app = express();
const goodsData = require("./../mock/goods.json");
var router = express.Router();
app.use('/api',router);

devServer: {
  before(app){
    app.get("/api/goods", (req, res)=> {
      res.json(goodsData);
    })
  },
  ……
}

6.3 實現圖片懶加載

使用vue-lazyload插件：

首先安裝插件：npm i vue-lazyload --save，

然後在main.js引入插件並初始化：

import VueLazyload from 'vue-lazyload'
 
Vue.use(VueLazyload)
 
// or with options
Vue.use(VueLazyload, {
  preLoad: 1.3,
  error: 'dist/error.png',
  loading: 'dist/loading.gif',
  attempt: 1
})

然後將需要懶加載的圖片上添加v-lazy綁定：

<a href="#"><img v-lazy="'static/'+item.productImg" alt=""></a>