javascript 查询商品

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA_Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Title</title>
    <link rel="stylesheet" href="bootstrap-3.3.7-dist/css/bootstrap.min.css" rel="stylesheet">
    <style>
        *{
            margin: 0;
        }
        .search{
            margin: auto;
            width: 860px;
            height: 25px;
        }
        table{

            margin: auto;
            width: 400px;
        }
        thread tr{
            height: 25px;
        }
        tbody tr{
            height: 25px;
        }
        tr th{
            padding: 0;
            width: 33.33%;
            border: 0.5px black solid;
            text-align: center;
        }
        tr td{
            padding: 0;
            width: 33.33%;
            height: 20px;
            border: 0.5px black solid;
            text-align: center;
        }
    </style>
</head>
<body>
<div class="search">
    按照价格查询：<input type="text" class="start"> - <input type="text" class="end">
    <button class="search-price">搜索</button> 按照商品查询：<input type="text"
    class="product"> <button class="search-pro">查询</button>
</div>
<table>
    <thread>
        <tr>
            <th>id</th>
            <th>产品名称</th>
            <th>价格</th>
        </tr>
    </thread>
    <tbody>

    </tbody>
</table>
<script>
    var data = [{
        id:1,
        pname:'小米',
        price:3999
    },{
        id:2,
        pname:'oppo',
        price:999
    },{
        id:3,
        pname:'荣耀',
        price:1299
    },{
        id:4,
        pname:'华为',
        price:1999
    }];
    window.onload = function () {
        // 1. 获取相应元素
        var tbody = document.querySelector('tbody');
        var search_price = document.querySelector('.search-price');
        var start = document.querySelector('.start');
        var end = document.querySelector('.end');
        var product = document.querySelector('.product');
        var search_pro = document.querySelector('.search-pro');
        setDate(data);
        // 2. 把数据渲染到页面中
        function setDate(mydata) {
            tbody.innerHTML = '';
            mydata.forEach(function (qurrentValue) {
                var tr = document.createElement('tr');
                tr.innerHTML = '<td>'+qurrentValue.id+'</td><td>'+qurrentValue.pname+'</td><td>'+qurrentValue.price+'</td>';
                tbody.appendChild(tr);
            });
        }
        // 3. 根据价格查询商品
        // 当我们点击了按钮，就可以根据我们的商品价格去筛选数组里面的对象
        search_price.addEventListener('click',function () {
            var newDate = data.filter(function (qurrentValue) {
                return qurrentValue.price >= start.value && qurrentValue.price <= end.value;
            });
            setDate(newDate);
        });
        // 4.根据商品名称查找商品
        // 如果查询数组中唯一的元素，用 some 方法更合适，因为它找到这个元素，就不再进行循环，效率更高
        search_pro.addEventListener('click',function () {
            var arr = [];
            data.some(function (qurrenValue) {
                if(qurrenValue.pname === product.value){
                    arr.push(qurrenValue);
                    return true;
                }
            });
            setDate(arr);
        })
    };
</script>
</body>
</html>
javascript 查询商品

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