This time I will bring you js operation form. What are the precautions for js operation form? Here is a practical case, let’s take a look.
Implementation ideas:
1. When adding: Get the number of rows in the current list and add the next row to the current row;
2. Use the insertCell() method to add a row, and the subscript starts from 0.
3. If you want to add a type to a new row . To respond to events, use the setAttribute() method, similar to a key-value pair, and use the appendChild() method to save the data to a new row
4. When deleting: Get the current number of rows to be deleted, this, and then get the parent node , delete the entire row remove(), instead of just deleting a single data of a certain row
5. When modifying: Get the row number index of the currently modified row. When clicking modify, convert the table status to text format, and Change "Modify" to "Confirm"
Implementation code:
<!DOCTYPE html>
<html>
<head>
<metacharset="UTF-8">
<title></title>
<style>
table{
border-top: 1px solid #ccc;
border-left: 1px solid #ccc;
width: 400px;
}
td,th{
border-right:1px solid #ccc ;
border-bottom: 1px solid #ccc;
}
</style>
<script>
function add(){
var table = document.getElementById("order");
var index = table.rows.length;//表格行数
var row = table.insertRow(index);//插入一个行并返回新一行
var c0 = row.insertCell(0);
var b0 = document.createElement("input");
b0.setAttribute("type","checkbox");
b0.setAttribute("onclick","seclect("+index+")");
b0.setAttribute("name","sel");
c0.appendChild(b0);
var c1 = row.insertCell(1);//在新一行插入一列，并返回新一列
c1.innerHTML = prompt("请输入商品名称","");
var c2 = row.insertCell(2);//在新一行插入一列，并返回新一列
c2.innerHTML = prompt("输入数量","");
var c3 = row.insertCell(3);//在新一行插入一列，并返回新一列
c3.innerHTML = prompt("输入价格","");
var c4 = row.insertCell(4);
var b1 = document.createElement("input");
b1.setAttribute("type","button");
b1.setAttribute("value","删除");
b1.setAttribute("onclick","del(this)");
var b2 = document.createElement("input");//创建按钮
b2.setAttribute("type","button");
b2.setAttribute("value","修改");
b2.setAttribute("style","margin-left: 5px");
b2.setAttribute("onclick","update("+index+")");
c4.appendChild(b1);//把按钮添加到操作的单元格中
c4.appendChild(b2);
}
function del(but){
//var table = document.getElementById("order");
but.parentNode.parentNode.remove();//根据节点的层级关系删除行
}
function update(index){
var table = document.getElementById("order");
//获得修改按钮
var cell=table.rows[index].cells[4];
cell.lastChild.setAttribute("value","确定");
//为按钮重新绑定事件
cell.lastChild.setAttribute("onclick","edit("+index+")");
//修改数量
var cellNumer = table.rows[index].cells[2];
var txt = document.createElement("input"); //创建一个文本框
txt.setAttribute("value",cellNumer.innerHTML);//设置文本框的值
txt.setAttribute("size",5);//文本框长度
cellNumer.innerHTML = "";//把单元格的数据清除
cellNumer.appendChild(txt); //把文本框加入到单元格
}
function edit(index){
var table = document.getElementById("order");
var cell = table.rows[index].cells[4];
cell.lastChild.setAttribute("value","修改");
cell.lastChild.setAttribute("onclick","update("+index+")");
//把单元格中的文本框删除
var cellNumer = table.rows[index].cells[2];
var num = cellNumer.firstChild.value;//取文本框的值
cellNumer.removeChild(cellNumer.firstChild);//删除文本框
cellNumer.innerHTML = num;
}
function allSelect(ch){
var item = document.getElementsByTagName("input"); //取所有的input标签
for(var i=0;i<item.length;i++){ //循环每一个
if(item[i].type==ch.type){ //判断每一个标签的类型是否为CheckBox
item[i].checked= ch.checked; //复选框的选中与全选的复选框选中相同
}
}
}
function seclect(sh){
varitem=document.getElementsByName("sel");
varall=document.getElementById("all");
vartag=true;
for(vari=0;i<item.length;i++){//判断是否全部选中
if(item[i].checked == false){
tag=false;
break;
}
}
all.checked=tag;
}
</script>
</head>
<body>
<center>
<tableid="order">
<tr>
<th>
<inputtype="checkbox"onclick="allSelect(this)"id="all"/>全选
</th>
<th>商品名称</th>
<th>数量</th>
<th>单价</th>
<th>操作</th>
</tr>
<tr>
<td><inputtype="checkbox"onclick="seclect(this)"name="sel"/></td>
<td>娃哈哈</td>
<td>10</td>
<td>2</td>
<td><inputvalue="删除"type="button"onclick="del(this)"style="margin-right:5px ;"/><inputvalue="修改"type="button"onclick="update(1)"/></td>
</tr>
</table>
<buttononclick="add()">添加商品</button>
</center>
</body>
</html>I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!
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The above is the detailed content of js operation form. For more information, please follow other related articles on the PHP Chinese website!
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