使用JavaScript动态添加/删除表格行

Question

使用JavaScript动态添加/删除表格行

29

我尝试根据这个例子（这里）和这个例子（这里），添加/删除表格行。以下是我的代码： HTML表单：

<div id="POItablediv">
    <input type="button" id="addPOIbutton" value="Add POIs"/><br/><br/>
    <table id="POITable" border="1">
        <tr>
            <td>POI</td>
            <td>Latitude</td>
            <td>Longitude</td>
            <td>Delete?</td>
            <td>Add Rows?</td>
        </tr>
        <tr>
            <td>1</td>
            <td><input size=25 type="text" id="latbox" readonly=true/></td>
            <td><input size=25 type="text" id="lngbox" readonly=true/></td>
            <td><input type="button" id="delPOIbutton" value="Delete" onclick="deleteRow(this)"/></td>
            <td><input type="button" id="addmorePOIbutton" value="Add More POIs" onclick="insRow()"/></td>
        </tr>
    </table>
</div>

JavaScript

function deleteRow(row)
{
    var i=row.parentNode.parentNode.rowIndex;
    document.getElementById('POITable').deleteRow(i);
}


function insRow()
{
    var x=document.getElementById('POITable').insertRow(1);
    var c1=x.insertCell(0);
    var c2=x.insertCell(1);
    c1.innerHTML="NEW CELL1";
    c2.innerHTML="NEW CELL2";
}

现在，正如您所看到的，我的表中有文本字段和按钮。我的希望：

只需重复行的结构。由于 innerHTML 只能获取文本，所以我现在无法这样做。我该如何插入文本字段或标签？
文本字段的 ID 也应该不同，因为我稍后将检索值并将其放入数据库中。
我想添加一个函数来增加 POI 的数量。

请问是否有人可以帮帮我？

- Pow

10个回答

4

使用Javascript轻松添加带有删除功能的多行

干杯！

<TABLE id="dataTable">
<tr><td>
               <INPUT TYPE=submit name=submit id=button class=btn_medium VALUE=\'Save\'  >
               <INPUT type="button" value="AddMore" onclick="addRow(\'dataTable\')" class="btn_medium"    /> 
</td></tr>

<TR>
<TD> 
                <input type="text" size="20" name="values[]"/> <br><small><font color="gray">Enter Title</font></small> 
</TD>
</TR>
</table>



<script>


function addRow(tableID) {

        var table = document.getElementById(tableID);

        var rowCount = table.rows.length;
        var row = table.insertRow(rowCount);

        var cell3 = row.insertCell(0);
       cell3.innerHTML = cell3.innerHTML +' <input type="text" size="20" name="values[]"/> <INPUT type="button"  class="btn_medium" value="Remove" onclick="this.parentNode.parentNode.parentNode.removeChild(this.parentNode.parentNode);" /><br><small><font color="gray">Enter Title</font></small>';
  //cell3.innerHTML = cell3.innerHTML +' <input type="text" size="20" name="values[]"/> <INPUT type="button"  class="btn_medium" value="Remove" onclick="this.parentNode.parentNode.innerHTML=\'\';" /><br><small><font color="gray">Enter Title</font></small>';       
}

</script>

- Bhavin Rana

3

这个回答比上面的回答看起来更加简洁...

<script>
var maxID = 0;
function getTemplateRow() {
var x = document.getElementById("templateRow").cloneNode(true);
x.id = "";
x.style.display = "";
x.innerHTML = x.innerHTML.replace(/{id}/, ++maxID);
return x;
}
function addRow() {
var t = document.getElementById("theTable");
var rows = t.getElementsByTagName("tr");
var r = rows[rows.length - 1];
r.parentNode.insertBefore(getTemplateRow(), r);

}
</script>


<table id="theTable">
<tr>
<td>id</td>
<td>name</td>
</tr>
<tr id="templateRow" style="display:none">
<td>{id}</td>
<td><input /></td>
</tr>
</table>


<button onclick="addRow();">Go</button>

- BradLaney

谢谢...是的，我想我必须这样做 :) - Pow

@BradLaney 为什么要学习 jQuery 来做这样的事情呢？我并不反对 jQuery，但是很多人在处理简单的事情时都依赖于 jQuery，而这些事情完全可以使用纯 JS 完成。过几年后，人们甚至会忘记 JS 的基础知识。 - nelek

对于原型设计，没有太多比它更好的了。 - BradLaney

2

您可以通过以下最简单的方式向表格添加一行：-

我发现这是一种最简单的添加行的方法。这个神奇的事情是，即使已经存在输入元素，它也不会改变已经存在的表格内容。

row = `<tr><td><input type="text"></td></tr>`
$("#table_body tr:last").after(row) ;

这里#table_body是表格主体标签的ID。

- Natesh bhat

2

如果在每一行上放置一个删除按钮，则：

<tr>
  <td><input type="button" value="Delete row" onclick="deleteRow(this);">
  <td><input type="text">
  <td><input type="text">

而 deleteRow 函数可以这样实现：

function deleteRow(el) {
    // while there are parents, keep going until reach TR 
    while (el.parentNode && el.tagName.toLowerCase() != 'tr') {
        el = el.parentNode;
    }

    // If el has a parentNode it must be a TR, so delete it
    // Don't delte if only 3 rows left in table
    if (el.parentNode && el.parentNode.rows.length > 3) {
        el.parentNode.removeChild(el);
    }
}

如果所有行的内容都相同，通过克隆现有行来添加行会更快：

function addRow(tableID) {
    var table = document.getElementById(tableID);

    if (!table) return;

    var newRow = table.rows[1].cloneNode(true);

    // Now get the inputs and modify their names 
    var inputs = newRow.getElementsByTagName('input');

    for (var i=0, iLen=inputs.length; i<iLen; i++) {
        // Update inputs[i]
    }

    // Add the new row to the tBody (required for IE)
    var tBody = table.tBodies[0];
    tBody.insertBefore(newRow, tBody.lastChild);
}

- soheil bijavar

这会在最后一行之前添加新行。如何在最后一行之后添加新行？ - Andrus

1

这里是包含HTML、CSS和JS的完整代码。

<style><style id='generate-style-inline-css' type='text/css'>
    body {
        background-color: #efefef;
        color: #3a3a3a;
    }

    a,
    a:visited {
        color: #1e73be;
    }

    a:hover,
    a:focus,
    a:active {
        color: #000000;
    }

    body .grid-container {
        max-width: 1200px;
    }

    body,
    button,
    input,
    select,
    textarea {
        font-family: "Open Sans", sans-serif;
    }

    .entry-content>[class*="wp-block-"]:not(:last-child) {
        margin-bottom: 1.5em;
    }

    .main-navigation .main-nav ul ul li a {
        font-size: 14px;
    }

    @media (max-width:768px) {
        .main-title {
            font-size: 30px;
        }
        h1 {
            font-size: 30px;
        }
        h2 {
            font-size: 25px;
        }
    }

    .top-bar {
        background-color: #636363;
        color: #ffffff;
    }

    .top-bar a,
    .top-bar a:visited {
        color: #ffffff;
    }

    .top-bar a:hover {
        color: #303030;
    }

    .site-header {
        background-color: #ffffff;
        color: #3a3a3a;
    }

    .site-header a,
    .site-header a:visited {
        color: #3a3a3a;
    }

    .main-title a,
    .main-title a:hover,
    .main-title a:visited {
        color: #222222;
    }

    .site-description {
        color: #757575;
    }

    .main-navigation,
    .main-navigation ul ul {
        background-color: #222222;
    }

    .main-navigation .main-nav ul li a,
    .menu-toggle {
        color: #ffffff;
    }

    .main-navigation .main-nav ul li:hover>a,
    .main-navigation .main-nav ul li:focus>a,
    .main-navigation .main-nav ul li.sfHover>a {
        color: #ffffff;
        background-color: #3f3f3f;
    }

    button.menu-toggle:hover,
    button.menu-toggle:focus,
    .main-navigation .mobile-bar-items a,
    .main-navigation .mobile-bar-items a:hover,
    .main-navigation .mobile-bar-items a:focus {
        color: #ffffff;
    }

    .main-navigation .main-nav ul li[class*="current-menu-"]>a {
        color: #ffffff;
        background-color: #3f3f3f;
    }

    .main-navigation .main-nav ul li[class*="current-menu-"]>a:hover,
    .main-navigation .main-nav ul li[class*="current-menu-"] .sfHover>a {
        color: #ffffff;
        background-color: #3f3f3f;
    }

    .navigation-search input[type="search"],
    .navigation-search input[type="search"]:active {
        color: #3f3f3f;
        background-color: #3f3f3f;
    }

    .navigation-search input[type="search"]:focus {
        color: #ffffff;
        background-color: #3f3f3f;
    }

    .main-navigation ul ul {
        background-color: #3f3f3f;
    }

    .main-navigation .main-nav ul ul li a {
        color: #ffffff;
    }

    .main-navigation .main-nav ul ul li:hover>a,
    .main-navigation .main-nav ul ul li:focus>a,
    .main-navigation .main-nav ul ul li.sfHover>a {
        color: #ffffff;
        background-color: #4f4f4f;
    }

    .main-navigation . main-nav ul ul li[class*="current-menu-"]>a {
        color: #ffffff;
        background-color: #4f4f4f;
    }

    .main-navigation .main-nav ul ul li[class*="current-menu-"]>a:hover,
    .main-navigation .main-nav ul ul li[class*="current-menu-"] .sfHover>a {
        color: #ffffff;
        background-color: #4f4f4f;
    }

    .separate-containers .inside-article,
    .separate-containers .comments-area,
    .separate-containers .page-header,
    .one-container .container,
    .separate-containers .paging-navigation,
    .inside-page-header {
        background-color: #ffffff;
    }

    .entry-meta {
        color: #595959;
    }

    .entry-meta a,
    .entry-meta a:visited {
        color: #595959;
    }

    .entry-meta a:hover {
        color: #1e73be;
    }

    .sidebar .widget {
        background-color: #ffffff;
    }

    .sidebar .widget .widget-title {
        color: #000000;
    }

    .footer-widgets {
        background-color: #ffffff;
    }

    .footer-widgets .widget-title {
        color: #000000;
    }

    .site-info {
        color: #ffffff;
        background-color: #222222;
    }

    .site-info a,
    .site-info a:visited {
        color: #ffffff;
    }

    .site-info a:hover {
        color: #606060;
    }

    .footer-bar .widget_nav_menu .current-menu-item a {
        color: #606060;
    }

    input[type="text"],
    input[type="email"],
    input[type="url"],
    input[type="password"],
    input[type="search"],
    input[type="tel"],
    input[type="number"],
    textarea,
    select {
        color: #666666;
        background-color: #fafafa;
        border-color: #cccccc;
    }

    input[type="text"]:focus,
    input[type="email"]:focus,
    input[type="url"]:focus,
    input[type="password"]:focus,
    input[type="search"]:focus,
    input[type="tel"]:focus,
    input[type="number"]:focus,
    textarea:focus,
    select:focus {
        color: #666666;
        background-color: #ffffff;
        border-color: #bfbfbf;
    }

    button,
    html input[type="button"],
    input[type="reset"],
    input[type="submit"],
    a.button,
    a.button:visited,
    a.wp-block-button__link:not(.has-background) {
        color: #ffffff;
        background-color: #666666;
    }

    button:hover,
    html input[type="button"]:hover,
    input[type="reset"]:hover,
    input[type="submit"]:hover,
    a.button:hover,
    button:focus,
    html input[type="button"]:focus,
    input[type="reset"]:focus,
    input[type="submit"]:focus,
    a.button:focus,
    a.wp-block-button__link:not(.has-background):active,
    a.wp-block-button__link:not(.has-background):focus,
    a.wp-block-button__link:not(.has-background):hover {
        color: #ffffff;
        background-color: #3f3f3f;
    }

    .generate-back-to-top,
    .generate-back-to-top:visited {
        background-color: rgba( 0, 0, 0, 0.4);
        color: #ffffff;
    }

    .generate-back-to-top:hover,
    .generate-back-to-top:focus {
        background-color: rgba( 0, 0, 0, 0.6);
        color: #ffffff;
    }

    .entry-content .alignwide,
    body:not(.no-sidebar) .entry-content .alignfull {
        margin-left: -40px;
        width: calc(100% + 80px);
        max-width: calc(100% + 80px);
    }

    @media (max-width:768px) {
        .separate-containers .inside-article,
        .separate-containers .comments-area,
        .separate-containers .page-header,
        .separate-containers .paging-navigation,
        .one-container .site-content,
        .inside-page-header {
            padding: 30px;
        }
        .entry-content .alignwide,
        body:not(.no-sidebar) .entry-content .alignfull {
            margin-left: -30px;
            width: calc(100% + 60px);
            max-width: calc(100% + 60px);
        }
    }

    .rtl .menu-item-has-children .dropdown-menu-toggle {
        padding-left: 20px;
    }

    .rtl .main-navigation .main-nav ul li.menu-item-has-children>a {
        padding-right: 20px;
    }

    .one-container .sidebar .widget {
        padding: 0px;
    }

    .append_row {
        color: black !important;
        background-color: #FFD6D6 !important;
        border: 1px #ccc solid !important;
    }

    .append_column {
        color: black !important;
        background-color: #D6FFD6 !important;
        border: 1px #ccc solid !important;
    }

    table#my-table td {
        width: 50px;
        height: 27px;
        border: 1px solid #D3D3D3;
        text-align: center;
        padding: 0;
    }

    div#my-container input {
        padding: 5px;
        font-size: 12px !important;
        width: 100px;
        margin: 2px;
    }

    .row {
        background-color: #FFD6D6 !important;
    }

    .col {
        background-color: #D6FFD6 !important;
    }
    </style>
    <script src="https://code.jquery.com/jquery-1.11.0.js"></script>
    <script>

    // append row to the HTML table
    function appendRow() {
        var tbl = document.getElementById('my-table'), // table reference
            row = tbl.insertRow(tbl.rows.length),      // append table row
            i;
        // insert table cells to the new row
        for (i = 0; i < tbl.rows[0].cells.length; i++) {
            createCell(row.insertCell(i), i, 'row');
        }
    }

    // create DIV element and append to the table cell
    function createCell(cell, text, style) {
        var div = document.createElement('div'), // create DIV element
            txt = document.createTextNode(text); // create text node
        div.appendChild(txt);                    // append text node to the DIV
        div.setAttribute('class', style);        // set DIV class attribute
        div.setAttribute('className', style);    // set DIV class attribute for IE (?!)
        cell.appendChild(div);                   // append DIV to the table cell
    }

    // append column to the HTML table
    function appendColumn() {
        var tbl = document.getElementById('my-table'), // table reference
            i;
        // open loop for each row and append cell
        for (i = 0; i < tbl.rows.length; i++) {
            createCell(tbl.rows[i].insertCell(tbl.rows[i].cells.length), i, 'col');
        }
    }

    // delete table rows with index greater then 0
    function deleteRows() {
        var tbl = document.getElementById('my-table'), // table reference
            lastRow = tbl.rows.length - 1,             // set the last row index
            i;
        // delete rows with index greater then 0
        for (i = lastRow; i > 0; i--) {
            tbl.deleteRow(i);
        }
    }

    // delete table columns with index greater then 0
    function deleteColumns() {
        var tbl = document.getElementById('my-table'), // table reference
            lastCol = tbl.rows[0].cells.length - 1,    // set the last column index
            i, j;
        // delete cells with index greater then 0 (for each row)
        for (i = 0; i < tbl.rows.length; i++) {
            for (j = lastCol; j > 0; j--) {
                tbl.rows[i].deleteCell(j);
            }
        }
    }
    </script>
    <div id="my-container">
    <center><br>
    <input type="button" value="Add row" onclick="javascript:appendRow()" class="append_row"><br>
    <input type="button" value="Add column" onclick="javascript:appendColumn()" class="append_column"><br>
    <input type="button" value="Delete rows" onclick="javascript:deleteRows()" class="delete"><br>
    <input type="button" value="Delete columns" onclick="javascript:deleteColumns()" class="delete"><br>
    <input type="button" value="Delete both" onclick="javascript:deleteColumns();deleteRows()" class="delete"><p></p>
    <table id="my-table" align="center" cellspacing="0" cellpadding="0" border="0">
    <tbody><tr>
    <td>Small</td>
    </tr>
    </tbody></table>
    <p></p></center>
    </div>

- Ashish Pathak

1

动态添加或删除行！

    <HTML>
<HEAD>
    <TITLE> Add/Remove dynamic rows in HTML table </TITLE>
    <style type="text/css">
        .democlass{
            color:red;
        }
    </style>
    <SCRIPT language="javascript">
        function addRow(tableID) {

            var table = document.getElementById(tableID);
            var rowCount = table.rows.length;
            var colCount = table.rows[0].cells.length;

            var row = table.insertRow(rowCount);
            for(var i = 0; i < colCount; i++) {
                var newcell = row.insertCell(i);
                newcell.innerHTML = table.rows[0].cells[i].innerHTML;
            }

            row = table.insertRow(table.rows.length);
            for(var i = 0; i < colCount; i++) {
                var newcell = row.insertCell(i);
                newcell.innerHTML = table.rows[1].cells[i].innerHTML;
            }

            row = table.insertRow(table.rows.length);
            for(var i = 0; i < colCount; i++) {
                var newcell = row.insertCell(i);
                newcell.innerHTML = table.rows[2].cells[i].innerHTML;
            }

            row = table.insertRow(table.rows.length);
            for(var i = 0; i < colCount; i++) {

                var newcell = row.insertCell(i);
                if(i == (colCount - 1)) {
                    newcell.innerHTML = "<INPUT type=\"button\" value=\"Delete Row\" onclick=\"removeRow(this)\"/>";
                } else {
                    newcell.innerHTML = table.rows[3].cells[i].innerHTML;
                }
            }
        }

        /**
         * This method deletes the specified section of the table
         * OR deletes the specified rows from the table.
         */
        function removeRow(src) {

            var oRow = src.parentElement.parentElement;
            var rowsCount = 0;
            for(var index = oRow.rowIndex; index >= 0; index--) {

                document.getElementById("dataTable").deleteRow(index);
                if(rowsCount == (4 - 1)) {
                    return;
                }
                rowsCount++;
            }
            //once the row reference is obtained, delete it passing in its rowIndex
            /* document.getElementById("dataTable").deleteRow(oRow.rowIndex); */
        }
    </SCRIPT>
</HEAD>
<BODY>
    <form name="myForm">
        <TABLE id="dataTable" width="350px" border="1">
            <TR>
                <TD>
                    <INPUT type="checkbox" name="chk"/>
                </TD>
                <TD>
                    Code
                </TD>
                <TD>
                    <INPUT type="text" name="txt"/>
                </TD>
                <TD>
                    Select Country
                </TD>
                <TD>
                    <SELECT name="country">
                        <OPTION value="in">India</OPTION>
                        <OPTION value="de">Germany</OPTION>
                        <OPTION value="fr">France</OPTION>
                        <OPTION value="us">United States</OPTION>
                        <OPTION value="ch">Switzerland</OPTION>
                    </SELECT>
                </TD>
            </TR>
            <TR>
                <TD>&nbsp;</TD>
                <TD>
                    First Name
                </TD>
                <TD>
                    <INPUT type="text" name="txt1"/>
                </TD>
                <TD>
                    Last Name
                </TD>
                <TD>
                    <INPUT type="text" name="txt2"/>
                </TD>
            </TR>
            <TR>
                <TD>&nbsp;</TD>
                <TD>Phone</TD>
                <TD>
                    <INPUT type="text" name="txt3"/>
                </TD>
                <TD>Address</TD>
                <TD>
                    <INPUT type="text" name="txt4" class="democlass"/>
                </TD>
            </TR>
            <TR>
                <TD>&nbsp;</TD>
                <TD>&nbsp;</TD>
                <TD>
                    &nbsp;
                </TD>
                <TD>&nbsp;</TD>
                <TD>
                    <INPUT type="button" value="Add Row" onclick="addRow('dataTable')" />
                </TD>
            </TR>
        </TABLE>
</BODY>
</HTML>

- Dinesh Lomte

1

1＆2：innerHTML可以接受HTML和文本。您可以这样做：

c1.innerHTML =“<input size=25 type=\"text\" id='newID' readonly=true/>”;

可能不是最好的方法，但您可以以这种方式完成。

3：我只会使用一个全局变量来保存POI的数量，并每次增加/减少它。

- Travesty3

0

JavaScript 动态添加表格数据。

脚本

function addRow(tableID) {
    var table = document.getElementById(tableID);
    var rowCount = table.rows.length;
    var colCount = table.rows[0].cells.length;    
    var validate_Noof_columns = (colCount - 1); // •No Of Columns to be Validated on Text.
    for(var j = 0; j < colCount; j++) { 
        var text = window.document.getElementById('input'+j).value;

        if (j == validate_Noof_columns) {
            row = table.insertRow(2); // •location of new row.
            for(var i = 0; i < colCount; i++) {       
            var text = window.document.getElementById('input'+i).value;
            var newcell = row.insertCell(i);
                if(i == (colCount - 1)) {  // Replace last column with delete button
    newcell.innerHTML = "<INPUT type='button' value='X' onclick='removeRow(this)'/>"; break;
                } else  {
                    newcell.innerHTML = text;
                    window.document.getElementById('input'+i).value = '';
                }
            }   
        }else if (text != 'undefined' && text.trim() == ''){ 
            alert('input'+j+' is EMPTY');break;
        }  
    }   
}
function removeRow(onclickTAG) {
    // Iterate till we find TR tag. 
    while ( (onclickTAG = onclickTAG.parentElement)  && onclickTAG.tagName != 'TR' );
            onclickTAG.parentElement.removeChild(onclickTAG);      
}

HTMl

<div align='center'>
<TABLE id='dataTable' border='1' >
<TBODY>
    <TR><th align='center'><b>First Name:</b></th>
        <th align='center' colspan='2'><b>Last  Name:</b></th>
        <th></th>
    </TR>    
    <TR><TD ><INPUT id='input0' type="text"/></TD>              
        <TD ><INPUT id='input1' type='text'/></TD>
        <TD>
<INPUT type='button' id='input2' value='+' onclick="addRow('dataTable')" />
        </TD>
    </TR>
</TBODY> 
</TABLE>
</div>

例子：jsfiddle

。

- Yash

0

我使用了上面提到的一些解决方案以及其他帖子中的解决方案，为包含输入字段的动态表格提供了一个可行的解决方案。我这样做是因为它可能会帮助那些在搜索与我相同的问题时找到这个线程的人，并且还因为被接受的答案（以及相关的jsfiddle）实际上并不起作用！也就是说，在插入/删除若干次后，它无法正确地索引表行。关键问题是如何唯一地索引动态行数据，这可以通过一点jquery来实现：

<form id=frmLines>
  <table id=tabLines>
  <tr>
    <td>img src='/some/suitable/graphic' onclick='removeLine(this);'/></td>
    <td><input type='text' name='field1' /></td>
    <td><input type='text' name='field2' /></td>
    <td><input type='text' name='field3' /></td>
  </tr>
  <tr>
    <td><img src='/some/suitable/graphic' onclick='addLine();' /></td>
    <td colspan=3>&nbsp;</td>
  </tr>
  </table>
</form>

请注意，表格和表单有id以进行直接DOM引用，但您不能在输入字段上使用id，因为要使它们唯一，您需要引入索引，这将极大地复杂化代码-当表单被处理时按名称访问它们已经足够容易（见下文）

然后控制添加和删除行的JavaScript如下：

function addLine() {
  var tabLines = document.getElementById("tabLines");
  var tabLinesRow = tabLines.insertRow(tabLines.rows.length-1);
  var col1html = "<img src='/some/suitable/graphic' onclick='removeLine(this);'>";
  var col2html = "<input type='text' name='field1' />";
  var col3html = "<input type='text' name='field2' />";
  var col4html = "<input type='text' name='field3' />";

  var col1 = tabLinesRow.insertCell(0); col1.innerHTML=col1html;
  var col2 = tabLinesRow.insertCell(1); col2.innerHTML=col2html;
  var col3 = tabLinesRow.insertCell(2); col3.innerHTML=col3html;
  var col4 = tabLinesRow.insertCell(3); col4.innerHTML=col4html;
}

function removeLine(lineItem) {
  var row = lineItem.parentNode.parentNode;
  row.parentNode.removeChild(row);
}

然后是拼图的最后一部分 - 处理表单数据提交时的javascript。这里的关键jquery函数是.eq() - 它允许您按照表单中出现的顺序访问字段名称 - 即按表格行顺序。

var frmData = {};              // an object to contain all form data
var arrLines = new Array();    // array to contain the dynamic lines

var tabLines = document.getElementById("tabLines").rows.length-1;

for (i=0;i<tabLines;i++) {
  arrLines[i] = {};
  arrLines[i]['no']     = i+1;
  arrLines[i]['field1'] = $("#frmLines input[name=field1]").eq(i).val();
  arrLines[i]['field2'] = $("#frmLines input[name=field2]").eq(i).val();
  arrLines[i]['field3'] = $("#frmLines input[name=field3]").eq(i).val();
}
frmData['lines'] = arrLines;

frmData['another_field'] = $('#frmLines input[name=another_field]").val();

var jsonData = JSON.stringify(frmData);

// lines of data now in a JSON structure as indexed array
// (plus other fields in the JSON as required)
// ready to post via ajax etc

我希望这篇文章能够直接或间接地帮助到某些人。其中使用了一些微妙的技巧，虽然并不复杂，但我花了3-4个小时才将它们拼凑在一起。

- Andy Lorenz

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- user113716 · Accepted Answer

你可以克隆第一个具有输入的行，然后获取嵌套的输入并将它们的ID更新为添加行号（同时对第一个单元格进行相同操作）。

function deleteRow(row)
{
    var i=row.parentNode.parentNode.rowIndex;
    document.getElementById('POITable').deleteRow(i);
}


function insRow()
{
    var x=document.getElementById('POITable');
       // deep clone the targeted row
    var new_row = x.rows[1].cloneNode(true);
       // get the total number of rows
    var len = x.rows.length;
       // set the innerHTML of the first row 
    new_row.cells[0].innerHTML = len;

       // grab the input from the first cell and update its ID and value
    var inp1 = new_row.cells[1].getElementsByTagName('input')[0];
    inp1.id += len;
    inp1.value = '';

       // grab the input from the first cell and update its ID and value
    var inp2 = new_row.cells[2].getElementsByTagName('input')[0];
    inp2.id += len;
    inp2.value = '';

       // append the new row to the table
    x.appendChild( new_row );
}

以下是演示

function deleteRow(row) {
  var i = row.parentNode.parentNode.rowIndex;
  document.getElementById('POITable').deleteRow(i);
}


function insRow() {
  console.log('hi');
  var x = document.getElementById('POITable');
  var new_row = x.rows[1].cloneNode(true);
  var len = x.rows.length;
  new_row.cells[0].innerHTML = len;

  var inp1 = new_row.cells[1].getElementsByTagName('input')[0];
  inp1.id += len;
  inp1.value = '';
  var inp2 = new_row.cells[2].getElementsByTagName('input')[0];
  inp2.id += len;
  inp2.value = '';
  x.appendChild(new_row);
}

<div id="POItablediv">
  <input type="button" id="addPOIbutton" value="Add POIs" /><br/><br/>
  <table id="POITable" border="1">
    <tr>
      <td>POI</td>
      <td>Latitude</td>
      <td>Longitude</td>
      <td>Delete?</td>
      <td>Add Rows?</td>
    </tr>
    <tr>
      <td>1</td>
      <td><input size=25 type="text" id="latbox" /></td>
      <td><input size=25 type="text" id="lngbox" readonly=true/></td>
      <td><input type="button" id="delPOIbutton" value="Delete" onclick="deleteRow(this)" /></td>
      <td><input type="button" id="addmorePOIbutton" value="Add More POIs" onclick="insRow()" /></td>
    </tr>
  </table>