How to dynamically create a table with JavaScript_javascript skills
Two ways to dynamically create tables using JavaScript are shared with you. The specific implementation is as follows
Method 1: The most original method, create elements one by one
var a1=document.createElement("table");
var a2=document.createElement("tbody");
var a3=document.createElement("tr");
var a4=document.createElement("td");
//开始appendchild()追加各个元素
a3.appendChild(a4);
a2.appendChild(a3);
a1.appendChild(a2);
Method 2: Use the functions contained in the table object: insert rows and insert columns
var tabNode=document.createElement("table");
var trNode=tabNode.insertRow();
var tdNode=trNode.insertCell;
tabNode.innerHTML="这是采用table对象里面的函数创建的"
注意：利用原始方法，一个个createElement时候，必须要添加一个tbody对象
//获取<table>标签的兄弟节点
// var node3=tabnode.previousSibling;//前一个节点 获取对此对象的上一个兄弟对象的引用。
// alert("previous--node3:"+node3);//#text
// 如果<table>后面有回车符，高版本的IE和火狐会识别成 “空白文本”#text，
// 而低版本IE会直接越过-----不光是<table>节点，其它节点也一样
// 表格的,<table>标签和<tr>标签中间，其实还隐藏着一个<tbody>标签----表格体
Dynamic creation and deletion:
Create a table by entering values:
function createTable(){
tableNode=document.createElement("table");//获得对象
tableNode.setAttribute("id","table")
var row=parseInt(document.getElementsByName("row1")[0].value);//获得行号
//alert(row);
if(row<=0 || isNaN(row) ){
alert("输入的行号错误，不能创建表格，请重新输入：");
return;
}
var cols=parseInt(document.getElementsByName("cols1")[0].value);
if(isNaN(cols) || cols<=0){
alert("输入的列号错误，不能创建表格，请重新输入：");
return;
}
//上面确定了 现在开始创建
for(var x=0;x<row;x++){
var trNode=tableNode.insertRow();
for(var y=0;y<cols;y++){
var tdNode=trNode.insertCell();
tdNode.innerHTML="单元格"+(x+1)+"-"+(y+1);
}
}
document.getElementById("div1").appendChild(tableNode);//添加到那个位置
} Delete row:
function delRow(){
//要删除行，必须得到table对象才能删除，所以在创建的时候必须要设置table对象的 id 方便操作
var tab=document.getElementById("table");//获得table对象
if(tab==null){
alert("删除的表不存在！")
return;
}
var rows=parseInt(document.getElementsByName("delrow1")[0].value);//获得要删除的对象
if(isNaN(rows)){
alert("输入的行不正确。请输入要删除的行。。。");
return;
}
if (rows >= 1 && rows <= tab.rows.length) {
tab.deleteRow(rows-1);
}else{
alert("删除的行不存在！！");
return ;
}
}
Delete column:
//删除列要麻烦些， 要通过行来进行删除
// 一行的cells的长度就是列的个数
//tab.rows[x].deleteCell(cols-1)
function delCols(){
//获得table对象
var tab=document.getElementById("table");
if(tab==null){
alert("删除的表不存在！！");
return ;
}
//获得文本框里面的内容
var cols=parseInt(document.getElementsByName("delcols1")[0].value);
//检查是否可靠
if(isNaN(cols)){
alert("输入不正确。请输入要输出的列。。");
return;
}
if(!(cols>=1 && cols<tab.rows[0].cells.length)){
alert("您要删除的行不存在！！");
return;
}
for(var x=0;x<tab.rows.length;x++){//所有的行
tab.rows[x].deleteCell(cols-1);
}
}
Full code:
<!DOCTYPE html>
<html>
<head>
<title>createTable2.html</title>
<style type="text/css">
table{
border:#00ffff solid 2px;
border-collapse:collapse;
}
td{
border:#8080ff solid 2px;
padding:10px;
}
</style>
<script type="text/javascript">
var tableNode;
function createTable(){
tableNode=document.createElement("table");//获得对象
tableNode.setAttribute("id","table")
var row=parseInt(document.getElementsByName("row1")[0].value);//获得行号
//alert(row);
if(row<=0 || isNaN(row) ){
alert("输入的行号错误，不能创建表格，请重新输入：");
return;
}
var cols=parseInt(document.getElementsByName("cols1")[0].value);
if(isNaN(cols) || cols<=0){
alert("输入的列号错误，不能创建表格，请重新输入：");
return;
}
//上面确定了 现在开始创建
for(var x=0;x<row;x++){
var trNode=tableNode.insertRow();
for(var y=0;y<cols;y++){
var tdNode=trNode.insertCell();
tdNode.innerHTML="单元格"+(x+1)+"-"+(y+1);
}
}
document.getElementById("div1").appendChild(tableNode);//添加到那个位置
}
function delRow(){
//要删除行，必须得到table对象才能删除，所以在创建的时候必须要设置table对象的 id 方便操作
var tab=document.getElementById("table");//获得table对象
if(tab==null){
alert("删除的表不存在！")
return;
}
var rows=parseInt(document.getElementsByName("delrow1")[0].value);//获得要删除的对象
if(isNaN(rows)){
alert("输入的行不正确。请输入要删除的行。。。");
return;
}
if (rows >= 1 && rows <= tab.rows.length) {
tab.deleteRow(rows-1);
}else{
alert("删除的行不存在！！");
return ;
}
}
//删除列要麻烦些， 要通过行来进行删除
// 一行的cells的长度就是列的个数
//tab.rows[x].deleteCell(cols-1)
function delCols(){
//获得table对象
var tab=document.getElementById("table");
if(tab==null){
alert("删除的表不存在！！");
return ;
}
//获得文本框里面的内容
var cols=parseInt(document.getElementsByName("delcols1")[0].value);
//检查是否可靠
if(isNaN(cols)){
alert("输入不正确。请输入要输出的列。。");
return;
}
if(!(cols>=1 && cols<tab.rows[0].cells.length)){
alert("您要删除的行不存在！！");
return;
}
for(var x=0;x<tab.rows.length;x++){//所有的行
tab.rows[x].deleteCell(cols-1);
}
}
</script>
</head>
<body>
行:<input type="text" name="row1"/>
列:<input type="text" name="cols1"/>
<input type="button" value="创建表格" onclick="createTable()"/><br/>
<input type="text" name="delrow1"/>
<input type="button" value="删除行" onclick="delRow()"/><br/>
<input type="text" name="delcols1"/>
<input type="button" value="删除列" onclick="delCols()"/><br>
<div id="div1"></div>
</body>
</html> Effect demonstration:
The above are two ways to dynamically create tables using JavaScript. I hope you like them.
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