使用 JQuery 从数组填充 table

Question

我有一个包含 16 个元素的数组，我想将其填充 table。我希望它有 2 行，每行有 8 个单元格，其中充满了数组。我的问题是，当填充 table 时，table 会将所有元素填充到一行中。我对 JQuery 没有太多经验，我想尝试让它发挥作用。任何帮助表示赞赏！这是我的代码：

//**********Javascript & JQuery**********
var array = [1,2,3,4,5,6,7,8,1,2,3,4,5,6,7,8];
var count = 0;
var totalCells = 8;

function writeTable() {
    var $table = $('#summaryOfResults');

    //Array always includes enough elements to fill an entire row, which is 8 cells. Outer loop determines how many rows to make.
    //Inner loop determines the elements to print in the cells for that row.
    for (var i = 0; i < array.length / 8; i++) {
        $table.find('#body').append('<tr>');
        for (var j = 0; j < totalCells; j++) {
            $table.append('<td>' + array[count] + '</td>');
            count++;
        }
        $table.append('</tr>');
    }
}

//**********HTML**********
<html>
<head>
</head>
<body>
<div id="resultsTable">
    <table id='summaryOfResults' border='1'>
        <tbody id="body">
            <tr>
                <th>#</th>
                <th>n<sub>i</sub></th>
                <th>n<sub>f</sub></th>
                <th>E<sub>i</sub> (J)</th>
                <th>E<sub>f</sub> (J)</th>
                <th>&Delta;E (J)</th>
                <th>&Delta;E (kJ/mol)</th>
                <th>&lambda; (nm)</th>
            </tr>
        </tbody>
    </table>
</div>
<div id="tableButtons">
    <button id='copyButton' onclick=''>Copy Table</button>
    <button id='clear' onclick='clearTable();'>Clear Table</button>
    <button id='write' onclick='writeTable();'>Write Table</button>
</div>
</body>
</html>

Answer 1

首先，您必须在每次点击时重置 count。
接下来，您必须指定必须将 <td> 元素附加到的确切位置。至于现在，您将它们直接附加到 <table> :

// your declaration of the table element:
var $table = $('#summaryOfResults');
// ...
// then in nested loop, you're appending the cells directly to the table:
$table.append('<td>' + array[count] + '</td>');

最后一件事 - .append('</tr>') 不是创建元素对象的正确方法，它应该是 '<tr/>' 或 '<tr></tr>'.

这应该是您要查找的内容：

function writeTable() {
    // cache <tbody> element:
    var tbody = $('#body');
    for (var i = 0; i < array.length / 8; i++) {
        // create an <tr> element, append it to the <tbody> and cache it as a variable:
        var tr = $('<tr/>').appendTo(tbody);
        for (var j = 0; j < totalCells; j++) {
            // append <td> elements to previously created <tr> element:
            tr.append('<td>' + array[count] + '</td>');
            count++;
        }
    }
    // reset the count:
    count = 0;
}

JSFiddle

或者，创建一个 HTML 字符串并将其附加到循环外的 table：

function writeTable() {
    // declare html variable (a string holder):
    var html = '';
    for (var i = 0; i < array.length / 8; i++) {
        // add opening <tr> tag to the string:
        html += '<tr>';
        for (var j = 0; j < totalCells; j++) {
            // add <td> elements to the string:
            html += '<td>' + array[count] + '</td>';
            count++;
        }
        // add closing </tr> tag to the string:
        html += '</tr>';
    }
    //append created html to the table body:
    $('#body').append(html);
    // reset the count:
    count = 0;
}

JSFiddle

使用 JQuery 从数组填充 table

Populate table from array using JQuery

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