昨天写了篇博客，有博友指出手动拼接html的写法不是很好，建议使用jsrender生成html，早上看了下jsrender，觉得和Handlebars很像，所以今天下午试着使用Handlebars生成html，不再手动拼接了。
代码如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>jquery Handlebars动态新增tr</title>
<style>
* {
margin: 0px;
padding: 0px;
margin: 0 auto;
font-size: 15px;
}
#infoDiv {
margin-top: 10px;
width: 900px;
border-top: 1px solid #79B2F1;
border-bottom: none;
}
#infoDiv table {
margin-top: 10px;
}
#infoDiv table td {
padding: 4px 6px;
text-align: left;
}
#submitDiv{
width: 100px;
}
#submitDiv span {
color: #fff;
background: #89D900;
height: 25px;
width: 100px;
display: block;
line-height: 25px;
font-weight: bold;
text-align: center;
margin: 0 auto;
}
#submitDiv a {
text-decoration: none;
}
#disDiv {
margin-top: 10px;
width: 900px;
}
#disDiv table {
margin-top: 10px;
border-collapse: collapse;
margin-bottom: 10px;
}
#disDiv table thead {
height: 30px;
line-height: 30px;
background: #F4F4F4;
}
#infoDetail td {
text-align: center;
padding: 4px 6px;
border-bottom: 1px solid #e6e6e6;
}
#infoDetail td a {
text-decoration: none;
}
.fixWidth {
width: 110px;
}
#resultDiv {
margin-top: 10px;
width: 900px;
border: 1px solid #E6E6E6;
padding: 10px;
display: none;
}
</style>
<script type="text/javascript" src="../../js/jquery-2.1.0.js"></script>
<script type="text/javascript" src="../../js/wdatepicker/WdatePicker.js"></script>
<script type="text/javascript" src="../../js/handlebars-v1.3.0.js"></script>
<script id="tr-template" type="text/x-handlebars-template">
{{#ifEqual varNum 1}}
<tr>
<td><a href="javascript:;" onclick="delRow(this,1)">删除</a></td>
<td><select onchange="onSelectChange(this);" class="fixWidth"><option value="">所有</option>
<option value="1">北京</option>
<option value="2">天津</option>
<option value="3">河北</option></select></td>
<td><select class="fixWidth"><option value="">所有</option></select></td>
<td><input type="text"></td>
<td><input type="text"></td>
<td><input type="text"></td>
</tr>
{{else}}
<tr>
<td style="vertical-align: middle" rowspan="{{varNum}}"><a href="javascript:;" onclick="delRow(this,{{varNum}})">删除</a></td>
<td style="vertical-align: middle" rowspan="{{varNum}}"><select onchange="onSelectChange(this);" class="fixWidth"><option value="">所有</option>
<option value="1">北京</option>
<option value="2">天津</option>
<option value="3">河北</option></select></td>
<td style="vertical-align: middle" rowspan="{{varNum}}"><select class="fixWidth"><option value="">所有</option></select></td>
<td><input type="text"></td>
<td><input type="text"></td>
<td><input type="text"></td>
</tr>
{{/ifEqual}}
{{addTr varNum}}
</script>
<script>
/* 删除当前行 */
function delRow(obj, num) {
if (num == 1) {
$(obj).parent().parent().remove();
} else if (num > 1) {
var o = $(obj).parent().parent();
var ary = new Array();
for (var i = 0; i < num; i++) {
ary[i] = o;
o = o.next("tr");
}
for (var i = 0; i < num; i++) {
ary[i].remove();
}
}
}
/* select onchange事件 */
function onSelectChange(obj) {
var varSelect = $.trim($(obj).val());
if (varSelect == '') {
return false;
}
var subSelect = $(obj).parent().next().children("select");
var varHtml = '';
if (varSelect == 1) {
varHtml += '<option value="11">北京2</option><option value="12">北京3</option><option value="13">北京4</option>';
} else if (varSelect == 2) {
varHtml += '<option value="21">天津2</option><option value="22">天津3</option><option value="23">天津4</option>';
} else if (varSelect == 3) {
varHtml += '<option value="31">河北2</option><option value="32">河北3</option><option value="33">河北4</option>';
}
subSelect.html(varHtml);
}
/* 使用handlerbar模版生成html */
function generateHtml(varNumTmp) {
var template = Handlebars.compile($("#tr-template")
.html());
var varObj={varNum:""+varNumTmp+""};
$("#infoDetail").append(template(varObj));
}
$(function() {
var varDate = new Date();
var varYear = varDate.getFullYear();
var varMon = varDate.getMonth() + 1;
var varDay = varDate.getDate();
if (varMon < 10) {
varMon = "0" + varMon;
}
$('#v_doneDate').val(varYear + "-" + varMon + "-" + varDay);
/* 按钮提交事件 */
$('#submitForm').on('click', function() {
$('#resultDiv').css("display", "none");
var varNumTmp = $.trim($('#v_num').val());
varNum = parseInt(varNumTmp);
if (isNaN(varNum) || varNum < 1) {
return false;
}
generateHtml(varNum);
});
$("#v_num").focus(function() {
$('#resultDiv').html('');
var varNum = $(this).val();
if (varNum == this.defaultValue) {
$(this).val("");
}
})
/* 失去焦点 */
$("#v_num").blur(function() {
$('#resultDiv').html('');
var varNum = $(this).val();
if (varNum == "") {
$(this).val(this.defaultValue);
} else {
varNum = parseInt(varNum);
if (isNaN(varNum) || varNum < 1) {
return false;
}
generateHtml(varNum);
}
})
$('#submitBtn').on(
'click',
function() {
var varInfo = "[{'v_id':'" + $.trim($("#v_id").val())
+ "','v_cname':'" + $.trim($("#v_cname").val())
+ "','v_pname':'" + $.trim($("#v_pname").val())
+ "','v_startDate':'"
+ $.trim($("#v_startDate").val())
+ "','v_doneDate':'"
+ $.trim($("#v_doneDate").val()) + "'}],";
varInfo += "[";
var infoDtl = $("#infoDetail");
var trAll = infoDtl.children("tr");
var trLen = trAll.length;
var varRegion = '';
var varCountry = '';
var varSaleName = '';
var varPrice = '';
var varSalePrice = '';
for (var i = 0; i < trLen; i++) {
var tdAll = $(trAll[i]).children("td");
var tdLen = tdAll.length;
if (tdLen > 3) {
varRegion = $.trim($(tdAll[1]).children("select")
.val());
varCountry = $.trim($(tdAll[2]).children("select")
.val());
varSaleName = $.trim($(tdAll[3]).children("input")
.val());
varPrice = $.trim($(tdAll[4]).children("input")
.val());
varSalePrice = $.trim($(tdAll[5]).children("input")
.val());
} else if (tdLen > 0 && tdLen <= 3) {
varSaleName = $.trim($(tdAll[0]).children("input")
.val());
varPrice = $.trim($(tdAll[1]).children("input")
.val());
varSalePrice = $.trim($(tdAll[2]).children("input")
.val());
}
varInfo += "{'varRegion':'" + varRegion
+ "','varCountry':'" + varCountry
+ "','varSaleName':'" + varSaleName
+ "','varPrice':'" + varPrice
+ "','varSalePrice':'" + varSalePrice + "'},";
}
varInfo = varInfo.substring(0, varInfo.length - 1);
varInfo += "]";
$('#resultDiv').css("display", "block");
$('#resultDiv').html(varInfo);
});
Handlebars.registerHelper('ifEqual', function(v1, v2, options) {
if(v1 === v2) {
return options.fn(this);
}
return options.inverse(this);
});
Handlebars.registerHelper('addTr', function(var1, fn) {
var result = '';
var len=parseInt(var1);
for(var i=1;i<len;i++) {
result+='<tr><td><input type="text"></td><td><input type="text"></td><td><input type="text"></td></tr>';
}
return new Handlebars.SafeString(result);;
});
});
</script>
</head>
<body>
<form id="contentForm" method="post" action="">
<div id="infoDiv">
<table border="0" width="100%" cellpadding="0" cellspacing="1">
<tr>
<td><label for="v_id">流水编号：</label></td>
<td><input id="v_id" name="v_id" type="text" maxlength="50"></td>
<td><label for="v_cname">单位名称：</label></td>
<td><input id="v_cname" name="v_cname" type="text"
maxlength="50"></td>
<td><label for="v_pname">用户姓名：</label></td>
<td><input id="v_pname" name="v_pname" type="text"
maxlength="50"></td>
</tr>
<tr>
<td><label for="v_num">明细数量：</label></td>
<td><input id="v_num" name="v_num" type="text" value="请输入正整数"></td>
<td><label for="v_startDate">生效时间：</label></td>
<td><input id="v_startDate" name="v_startDate" type="text"
class="Wdate"
onfocus="WdatePicker({minDate:'%y-%M-%d',maxDate:'#F{\'2099-12-31\'}'})"></td>
<td><label for="v_doneDate">制作日期：</label></td>
<td><input id="v_doneDate" name="v_doneDate" type="text"
class="Wdate"
onfocus="WdatePicker({minDate:'%y-%M-%d',maxDate:'#F{\'2099-12-31\'}'})"></td>
</tr>
<tr>
<td colspan="4"></td>
<td><div id="submitDiv">
<a id="submitForm" href="javascript:void(0);"> <span>新增明细列</span></a>
</div></td>
</tr>
</table>
</div>
<div id="disDiv">
<table border="0" width="100%" cellpadding="0" cellspacing="1">
<colgroup>
<col width="10%">
<col width="20%">
<col width="20%">
<col width="20%">
<col width="15%">
<col width="15%">
</colgroup>
<thead>
<tr>
<th>操作</th>
<th>地市</th>
<th>县市</th>
<th>营销名称</th>
<th>原价</th>
<th>优惠价</th>
</tr>
</thead>
<tbody id="infoDetail"></tbody>
</table>
</div>
<div id="submitDiv">
<a id="submitBtn" href="javascript:void(0);"> <span>提交</span></a>
</div>
</form>
<div id="resultDiv"></div>
</body>
</html>
结果如下:
在明细数量输入1,结果为:
输入2，结果为:
说明:
Handlebars如果使用{{#if num==1}}这种写法，会报错.
Uncaught Error: Parse error on line 2:
{{#if varNum ==1}} <tr>
-------------------^
Expecting 'STRING', 'INTEGER', 'BOOLEAN', 'OPEN_SEXPR', 'ID', 'DATA', got 'EQUALS'
解决方法：自定义Equal方法，参考http://stackoverflow.com/questions/8853396/logical-operator-in-a-handlebars-js-if-conditional。
扩展的方法如果返回值想保持原值，请使用 return new Handlebars.SafeString(result);
针对博友说的给tr指定id,使用id删除更好，本人暂时没有完成，主要是如果明细列大于1，在模版里面判断有些麻烦。
感谢提出意见的各位博友，谢谢。
本文系原创，转载请注明出处，谢谢。
全文完。