原生
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>添加删除记录练习</title>
<link rel="stylesheet" type="text/css" href="css.css" />
</head>
<body>
<table id="employeeTable">
<tr>
<th>Name</th>
<th>Email</th>
<th>Salary</th>
<th> </th>
</tr>
<tr>
<td>Tom</td>
<td>tom@tom.com</td>
<td>5000</td>
<td><a href="deleteEmp?id=001">Delete</a></td>
</tr>
<tr>
<td>Jerry</td>
<td>jerry@sohu.com</td>
<td>8000</td>
<td><a href="deleteEmp?id=002">Delete</a></td>
</tr>
<tr>
<td>Bob</td>
<td>bob@tom.com</td>
<td>10000</td>
<td><a href="deleteEmp?id=003">Delete</a></td>
</tr>
</table>
<div id="formDiv">
<h4>添加新员工</h4>
<table>
<tr>
<td class="word">name: </td>
<td class="inp">
<input type="text" name="empName" id="empName" />
</td>
</tr>
<tr>
<td class="word">email: </td>
<td class="inp">
<input type="text" name="email" id="email" />
</td>
</tr>
<tr>
<td class="word">salary: </td>
<td class="inp">
<input type="text" name="salary" id="salary" />
</td>
</tr>
<tr>
<td colspan="2" align="center">
<button id="addEmpButton" value="abc">
Submit
</button>
</td>
</tr>
</table>
</div>
<script type="text/javascript">
/*
功能说明:
1. 点击'Submit', 根据输入的信息在表单中生成一行员工信息
2. 点击Delete链接, 提示删除当前行信息, 点击确定后删除信息
技术要点:
1. DOM查询
2. 绑定事件监听
3. DOM增删改
5. 取消事件的默认行为
*/
function removeTr(){
var trNode = this.parentNode.parentNode;
var tds = trNode.getElementsByTagName("td");
var nameStr = tds[0].firstChild.nodeValue;
var flag = confirm("真的要删除" + nameStr + "的信息吗？");
if(flag){
trNode.parentNode.removeChild(trNode);//这里要找到父元素才能调用删节点函数
}
return false;//消除取消的影响
}
window.onload = function(){
//目标1：点击Delete删除记录
var aEles = document.getElementsByTagName("a");
for(var i = 0;i < aEles.length;i++){
aEles[i].onclick = removeTr;
}
//目标2：点击Submit增加记录
var subBtn = document.getElementById("addEmpButton");
subBtn.onclick = function(){
//1.收集输入的数据
var nameText = trim(document.getElementById("empName").value);
var emailText = trim(document.getElementById("email").value);
var salaryText = trim(document.getElementById("salary").value);
document.getElementById("empName").value = nameText;//去除文本中多余空格
document.getElementById("email").value = emailText;
document.getElementById("salary").value = salaryText;
if(nameText == "" || emailText == "" || salaryText == ""){
alert("您输入的内容不完整");
return ;
}
//组装节点
var nameTd = document.createElement("td");
nameTd.appendChild(document.createTextNode(nameText));
var emailTd = document.createElement("td");
emailTd.appendChild(document.createTextNode(emailText));
var salaryTd = document.createElement("td");
salaryTd.appendChild(document.createTextNode(salaryText));
var aTd = document.createElement("td");
var aNewEle = document.createElement("a");
aNewEle.href = "deleteEmp?id=XXX";
aNewEle.appendChild(document.createTextNode("Delete"));
aNewEle.onclick = removeTr;
aTd.appendChild(aNewEle);
var trNode = document.createElement("tr");
trNode.appendChild(nameTd);
trNode.appendChild(emailTd);
trNode.appendChild(salaryTd);
trNode.appendChild(aTd);
var empTable = document.getElementById("employeeTable");
empTable.appendChild(trNode);
}
function trim(str){
var reg = /^\s*|\s*$/g;//意为去除目标字符串左右两边的空白字符
//表达式加上参数g之后，表明可以进行全局匹配
//replace 一个在字符串中执行查找匹配的String方法，并且使用替换字符串替换掉匹配到的子字符串。
return str.replace(reg,"");
/*
replace() 方法通过用 newChar 字符替换字符串中出现的所有 searchChar 字符，并返回替换后的新字符串。
public String replace(char searchChar, char newChar)
*/
}
}
</script>
</body>
</html>
jQuery
event.preventDefault()Event 接口的 preventDefault()方法，告诉user agent：如果此事件没有被显式处理，它默认的动作也不应该照常执行。此事件还是继续传播，除非碰到事件侦听器调用stopPropagation() 或stopImmediatePropagation()，才停止传播。
id是给服务端的用的。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>添加删除记录练习</title>
<link rel="stylesheet" type="text/css" href="css.css"/>
</head>
<body>
<table id="employeeTable">
<tr>
<th>Name</th>
<th>Email</th>
<th>Salary</th>
<th> </th>
</tr>
<tr>
<td>Tom</td>
<td>tom@tom.com</td>
<td>5000</td>
<td><a href="deleteEmp?id=001">Delete</a></td>
</tr>
<tr>
<td>Jerry</td>
<td>jerry@sohu.com</td>
<td>8000</td>
<td><a href="deleteEmp?id=002">Delete</a></td>
</tr>
<tr>
<td>Bob</td>
<td>bob@tom.com</td>
<td>10000</td>
<td><a href="deleteEmp?id=003">Delete</a></td>
</tr>
</table>
<div id="formDiv">
<h4>添加新员工</h4>
<table>
<tr>
<td class="word">name:</td>
<td class="inp">
<input type="text" name="empName" id="empName"/>
</td>
</tr>
<tr>
<td class="word">email:</td>
<td class="inp">
<input type="text" name="email" id="email"/>
</td>
</tr>
<tr>
<td class="word">salary:</td>
<td class="inp">
<input type="text" name="salary" id="salary"/>
</td>
</tr>
<tr>
<td colspan="2" align="center">
<button id="addEmpButton" value="abc">
Submit
</button>
</td>
</tr>
</table>
</div>
<script src="jquery-1.10.1.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
/*
功能说明:
1. 点击'Submit', 根据输入的信息在表单中生成一行员工信息
2. 点击Delete链接, 提示删除当前行信息, 点击确定后删除信息
技术要点:
1. DOM查询
2. 绑定事件监听
3. DOM增删改
4. 取消事件的默认行为
*/
$(function () {
$('#addEmpButton').click(function () {
//1.收集输入的数据
var $empName = $('#empName')
var $email = $('#email')
var $salary = $('#salary')
var empName = $empName.val()
var email = $email.val()
var salary = $salary.val()
var id = Date.now()//随机数
//2.生成对应的<tr>标签结构，并插入#employeeTable的tbody中
/*
<tr>
<td>Bob</td>
<td>bob@tom.com</td>
<td>10000</td>
<td><a href="deleteEmp?id=003">Delete</a></td>
</tr>
*/
$('<tr></tr>')
.append('<td>'+empName+'</td>')//拼串
.append('<td>'+email+'</td>')
.append('<td>'+salary+'</td>')
.append('<td><a href="deleteEmp?id='+id+'">Delete</a></td>')
.appendTo('#employeeTable')
.find('a')
.click(clickA)//给a标签加点击监听，阻止自带的行为
//3.清除
$empName.val('')
$email.val('')
$salary.val('')
})
//给所有删除链接绑定点击监听
$('a').click(clickA)
function clickA (event) {
event.preventDefault()
var $tr = $(this).parent().parent()
var name = $tr.children('td:first').html()
if(confirm('确定删除'+name+'吗?')) {
$tr.remove()
}
}
})
</script>
</body>
</html>
效果展示
