jQuery结合Handlebars动态新增Tr示例

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jQuery
工作记录

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。