使用原生JS实现火锅点餐小程序(面向对象思想)
本次小程序采用ES6开发标准,不会的宝宝们请先学习,再来观看吧!
使用条件:使用ES6标准开发;因为采用了Bootstrap在线,所以需要联网;VSCode开发工具,在本地服务器中打开。
代码展示:
Demo.html(网页),Demo.css(样式),Test01.js(菜单类),Test02.js(循环菜单),Test03.js(增,删操作)
下面进行一一展示:
Demo.html(网页):
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <link href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" rel="stylesheet"> <link rel="stylesheet" href="Demo.css" rel="external nofollow" > <script type="text/javascript" src="Test03.js"></script> </head> <body> <div class="container"> <div class="row"> <div class="col-md-6"> <table id='table1' class="table table-bordered table-striped"> <tr> <td>名称</td> <td>价格</td> <td>图片</td> <td>操作</td> </tr> <tbody id = 'tbody'></tbody> </table> </div> <div class="col-md-6"> <table id='table2' class="table table-bordered" style="background-color:burlywood;"> <tr> <td>名称</td> <td>价格</td> <td>数量</td> <td>操作</td> </tr> <tbody id="tbody1"></tbody> </table> </div> </div> </div> <script type="module"> import {db_foot} from './Test02.js'; let contents = []; window.onload = function(){ for(const foots of db_foot()){ contents.push(` <tr> <td>${foots.name}</td> <td>${foots.price}</td> <td>${foots.pic}</td> <td><button value="${foots.name}" money="${foots.price}" class="btn btn-sm btn-info" οnclick="sss(this)">加入菜单</button></td> </tr> `); document.getElementById('tbody').innerHTML = contents.join(""); }; }; </script> </body> </html>
Demo.css(样式):
*{margin: 0;padding: 0;} tr,td{ text-align:center; line-height: 20px; } td{ vertical-align: middle; }
Test01.js(菜单类):
export default class Person{ constructor(name,price,pic){ this.name = name; this.price = price; this.pic = pic; } }
Test02.js(循环菜单):
import Person from './Test01.js'; export function db_foot(){ let foots = new Array(); foots.push(new Person('鱼香肉丝',100,'')); foots.push(new Person('宫保鸡丁',200,'')); foots.push(new Person('菠萝吹雪',300,'')); return foots; }
Test03.js(增,删操作):
let contents = []; function sss(e){ var flag = true; var zhi = e.getAttribute("value"); var num = e.getAttribute("money"); var arr_tr =document.getElementById("table2").getElementsByTagName("tr"); let i; for(i=0 ; i<arr_tr.length ; i++){ var td = arr_tr[i].firstElementChild.innerHTML; //重复点菜,修改数量和金钱 if(td == zhi){ flag = false; //个数 var count = arr_tr[i].firstElementChild.nextElementSibling.nextElementSibling; var sum = count.innerHTML = parseFloat(count.innerHTML) + 1; //金钱数 var qian = arr_tr[i].firstElementChild.nextElementSibling.innerHTML = sum * num; break; } } if(flag){ let tbody1 = document.getElementById("tbody1"); var tr = document.createElement("tr"); //名称 var td1 = document.createElement("td"); td1.innerHTML = `${zhi}`; //价钱 var td2 = document.createElement("td"); td2.innerHTML = `${num}`; //数量 var td3 = document.createElement("td"); td3.innerHTML = `1`; //操作 var td4 = document.createElement("td"); td4.innerHTML = `<button class="btn btn-sm btn-warning" οnclick='shanchu(this)'>删除</button>`; //插入 tr.appendChild(td1); tr.appendChild(td2); tr.appendChild(td3); tr.appendChild(td4); tbody1.appendChild(tr); } } //删除 function shanchu(obj){ obj.parentNode.parentNode.parentNode.removeChild(obj.parentNode.parentNode); }
总结
以上所述是小编给大家介绍的使用原生JS实现火锅点餐小程序(面向对象思想),希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对我们网站的支持!
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