How To Move Selected HTML Table Row Up And Down In Javascript
In This Javascript Tutorial we will See How To Change Selected HTML Table Row Position Up Or Down On Button Click using JS And Netbeans Editor .
Project Source Code:
<!DOCTYPE html>
<html>
<head>
<title>HTML Table Row Up And Down</title>
<meta charset="windows-1252">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
tr{cursor: pointer}
.selected{background-color: red; color: #fff;font-weight: bold}
button{margin-top:10px;background-color: #eee;border: 2px solid #00F;
color: #17bb1c;font-weight: bold;font-size: 25px;cursor: pointer}
</style>
</head>
<body>
<table id="table" border="1">
<tr>
<th>First Name</th>
<th>Last Name</th>
<th>Age</th>
</tr>
<tr>
<td>A1</td>
<td>B1</td>
<td>C1</td>
</tr>
<tr>
<td>A2</td>
<td>B2</td>
<td>C2</td>
</tr>
<tr>
<td>A3</td>
<td>B3</td>
<td>C3</td>
</tr>
<tr>
<td>A4</td>
<td>B4</td>
<td>C4</td>
</tr>
<tr>
<td>A5</td>
<td>B5</td>
<td>C5</td>
</tr>
</table>
<button onclick="upNdown('up');">↑</button>
<button onclick="upNdown('down');">↓</button>
<script>
var index; // variable to set the selected row index
function getSelectedRow()
{
var table = document.getElementById("table");
for(var i = 1; i < table.rows.length; i++)
{
table.rows[i].onclick = function()
{
// clear the selected from the previous selected row
// the first time index is undefined
if(typeof index !== "undefined"){
table.rows[index].classList.toggle("selected");
}
index = this.rowIndex;
this.classList.toggle("selected");
};
}
}
getSelectedRow();
function upNdown(direction)
{
var rows = document.getElementById("table").rows,
parent = rows[index].parentNode;
if(direction === "up")
{
if(index > 1){
parent.insertBefore(rows[index],rows[index - 1]);
// when the row go up the index will be equal to index - 1
index--;
}
}
if(direction === "down")
{
if(index < rows.length -1){
parent.insertBefore(rows[index + 1],rows[index]);
// when the row go down the index will be equal to index + 1
index++;
}
}
}
</script>
</body>
</html>
OUTPUT:
