当前位置：网站首页>ES6 advanced - query commodity cases

ES6 advanced - query commodity cases

2022-07-26 15:45:00 【setTimeout()】

First, let's look at the layout ：

  Functions that need to be realized to query commodity cases ：
1. Render the data to the page

2. Display data according to price

3. Display data according to product name

Function one ： Dynamically render data to the page 

  //  obtain tbody
        var tb = document.querySelector('tbody');
        //  Render the data to the page 
        datas(data)

        function datas(data) {
            //  Empty tbody What's in it 
            tb.innerHTML = '';
            data.forEach(function(value) {
                //  Create a line 
                var tr = document.createElement('tr');
                //  Create three columns 
                tr.innerHTML = '<td>' + value.id + '</td><td>' + value.pname + '</td><td>' + value.price + '</td>';
                //  Append this line to tbody Inside 
                tb.appendChild(tr);
            })
        }

Function 2 ： Query goods by price 

 //  Query goods by price 
        //  When we hit the button , We can screen the objects according to our commodity prices 
        //  Get elements 
        var star = document.querySelector('.start');
        var end = document.querySelector('.end');
        var searchbtn = document.querySelector('.search-price');
        searchbtn.addEventListener('click', function() {
                var starval = star.value;
                var endval = end.value;
                console.log(starval);
                console.log(endval);
                var newdata = data.filter(function(value) {
                        return value.price >= starval && value.price <= endval
                    })
                    //  Render new data to the page 
                datas(newdata)

            })

Function three ： Query the commodity according to the commodity name 

 //  Display data according to product name 
            //  If the only element in the query data , use some The method is appropriate , Because she found this element, she stopped cycling , More efficient 
            //  Get elements 
        var pro = document.querySelector('.product');
        var probtn = document.querySelector('.search-pro');
        probtn.addEventListener('click', function() {
            var arr = [];
            data.some(function(value) {
                    if (value.pname === pro.value) {
                        // datas(value)
                        arr.push(value);
                        return true; // Must write true
                    }
                })
                //  Render to page 
            datas(arr)
        })

The complete code is as follows ：
 

<!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>
    <style>
        table {
            width: 400px;
            border: 1px solid #000;
            border-collapse: collapse;
            margin: 0 auto;
        }
        
        td,
        th {
            border: 1px solid #000;
            text-align: center;
        }
        
        input {
            width: 50px;
        }
        
        .search {
            width: 600px;
            margin: 20px auto;
        }
    </style>
</head>

<body>
    <div class="search">
         Inquire according to the price : <input type="text" class="start"> - <input type="text" class="end"> <button class="search-price"> Search for </button>  Query by commodity name : <input type="text" class="product"> <button class="search-pro"> Inquire about </button>
    </div>
    <table>
        <thead>
            <tr>
                <th>id</th>
                <th> The product name </th>
                <th> Price </th>
            </tr>
        </thead>
        <tbody>


        </tbody>
    </table>
    <script>
        //  Use the new array method to manipulate data 
        var data = [{
                id: 1,
                pname: ' millet ',
                price: 3999
            }, {
                id: 2,
                pname: 'oppo',
                price: 999
            }, {
                id: 3,
                pname: ' glory ',
                price: 1299
            }, {
                id: 4,
                pname: ' Huawei ',
                price: 1999
            }, ]
            //  obtain tbody
        var tb = document.querySelector('tbody');
        //  Render the data to the page 
        datas(data)

        function datas(data) {
            //  Empty tbody What's in it 
            tb.innerHTML = '';
            data.forEach(function(value) {
                //  Create a line 
                var tr = document.createElement('tr');
                //  Create three columns 
                tr.innerHTML = '<td>' + value.id + '</td><td>' + value.pname + '</td><td>' + value.price + '</td>';
                //  Append this line to tbody Inside 
                tb.appendChild(tr);
            })
        }
        //  Query goods by price 
        //  When we hit the button , We can screen the objects according to our commodity prices 
        //  Get elements 
        var star = document.querySelector('.start');
        var end = document.querySelector('.end');
        var searchbtn = document.querySelector('.search-price');
        searchbtn.addEventListener('click', function() {
                var starval = star.value;
                var endval = end.value;
                console.log(starval);
                console.log(endval);
                var newdata = data.filter(function(value) {
                        return value.price >= starval && value.price <= endval
                    })
                    //  Render new data to the page 
                datas(newdata)

            })
            //  Display data according to product name 
            //  If the only element in the query data , use some The method is appropriate , Because she found this element, she stopped cycling , More efficient 
            //  Get elements 
        var pro = document.querySelector('.product');
        var probtn = document.querySelector('.search-pro');
        probtn.addEventListener('click', function() {
            var arr = [];
            data.some(function(value) {
                    if (value.pname === pro.value) {
                        // datas(value)
                        arr.push(value);
                        return true; // Must write true
                    }
                })
                //  Render to page 
            datas(arr)
        })
    </script>
</body>

</html>

原网站

版权声明
本文为[setTimeout()]所创，转载请带上原文链接，感谢
https://yzsam.com/2022/207/202207261524504951.html

边栏推荐

猜你喜欢

随机推荐