<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> </head> <body> <select name="" id=""> <option value="0">请选择销量范围</option> <option value="1"><100</option> <option value="2">100~500</option> <option value="3">>500</option> </select> <ul> <li>牛客logo马克杯</li> <li>无盖星空杯</li> <li>老式茶杯</li> <li>欧式印花杯</li> </ul> <script> var cups = [ { type: 1, price: 100, color: 'black', sales: 60, name: '牛客logo马克杯' }, { type: 2, price: 40, color: 'blue', sales: 100, name: '无盖星空杯' }, { type: 4, price: 60, color: 'green', sales: 200, name: '老式茶杯' }, { type: 3, price: 50, color: 'green', sales: 600, name: '欧式印花杯' } ] var select = document.querySelector('select'); var ul = document.querySelector('ul'); // 补全代码 select.onchange = function(){ var index = select.selectedIndex; function show(arr){ let list = ''; arr.forEach(function(v){ list += `<li>${v.name}</li>` }) ul.innerHTML = list; } function choice(cups,index){ let resArr = cups.filter(function(v){ if(index == 1){ return v.sales < 100; }else if(index == 2){ return v.sales >=100 && v.sales <=500; }else if(index == 3){ return v.sales >500; } }) return resArr; } show(choice(cups,index)); } </script> </body> </html>