JS realizes merging the same cells in the table
This time I will bring you JS to merge the same cells in the table. What are the precautions for JS to merge the same cells in the table? The following is a practical case, let's take a look.
Be sure to note that if you loop from the beginning of the list and remove an element, some elements will not be found or are not the elements you are looking for. Anyone who is interested can study it
<!DOCTYPE html>
<html>
<head>
<title>merge.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="stylesheet" href="css/jquery-ui.css" />
<script src="js/jquery.js"></script>
<script src="js/jquery-ui.js"></script>
<script type="text/javascript">
function merge1(){ //可实现单元格，通过给 开始cell的比较
var totalRow = $("#tbl").find("tr").length;
var totalCol = $("#tbl").find("tr").eq(0).find("td").length;
for(var col=totalCol-1;col>=1;col--){
spanNum =1;
startCell = $("#tbl").find("tr").eq(totalRow-1).find("td").eq(col);
for(var row = totalRow-1;row>=1;row--){
targetCell = $("#tbl").find("tr").eq(row-1).find("td").eq(col);
if(startCell.text() == targetCell.text() && startCell.text()!=""){
spanNum++;
targetCell.attr("rowSpan",spanNum);
startCell.remove();
}else{
spanNum =1;
}
startCell = targetCell;
}
}
}
function merge2() { //可实现合并单元格,上下行来比较
var totalCols = $("#tbl").find("tr:eq(0)").find("td").length;
var totalRows = $("#tbl").find("tr").length;
for ( var i = totalCols-1; i >= 1; i--) {
for ( var j = totalRows-1; j >= 1; j--) {
startCell = $("#tbl").find("tr").eq(j).find("td").eq(i);
targetCell = $("#tbl").find("tr").eq(j - 1).find("td").eq(i);
if (startCell.text() == targetCell.text() && targetCell.text() != "") {
targetCell.attr("rowSpan", (startCell.attr("rowSpan")==undefined)?2:(eval(startCell.attr("rowSpan"))+1));
startCell.remove();
}
}
}
}
/*先合并，使用style 的display:none将相同元素隐藏，然后再remove
*/
function merge3(){
var totalCols = $("#tbl").find("tr:eq(0)").find("td").length;
var totalRows = $("#tbl").find("tr").length;
for(var col=totalCols-1;col>=1;col--){
spanNum =1;
startCell = $("#tbl").find("tr").eq(totalRows-1).find("td").eq(col);
for(var row = totalRows-1;row>=1;row--){
targetCell = $("#tbl").find("tr").eq(row-1).find("td").eq(col);
if(startCell.text() == targetCell.text() && startCell.text()!=""){
spanNum++;
targetCell.attr("rowSpan",spanNum);
startCell.attr("style","visibility:hidden");
// startCell.attr("style","display:none");
}else{
spanNum =1;
}
startCell = targetCell;
}
}
for(var j=totalCols-1;j>=1;j--){
for(var i=totalRows-1;i>=1;i--){
cell = $("#tbl").find("tr").eq(i).find("td").eq(j);
if(cell.attr("style")!=undefined){
if(cell.attr("style")=="visibility:hidden"){
cell.remove();
}
}
}
}
}
function merge4(){ //与merge3方法类似，目的是看一下 display:none与visibility:hidden的效果区别
var totalCols = $("#tbl").find("tr:eq(0)").find("td").length;
var totalRows = $("#tbl").find("tr").length;
for(var col=totalCols-1;col>=1;col--){
spanNum =1;
startCell = $("#tbl").find("tr").eq(totalRows-1).find("td").eq(col);
for(var row = totalRows-1;row>=1;row--){
targetCell = $("#tbl").find("tr").eq(row-1).find("td").eq(col);
if(startCell.text() == targetCell.text() && startCell.text()!=""){
spanNum++;
targetCell.attr("rowSpan",spanNum);
startCell.attr("style","display:none");
// startCell.attr("style","display:none");
}else{
spanNum =1;
}
startCell = targetCell;
}
}
for(var j=totalCols-1;j>=1;j--){
for(var i=totalRows-1;i>=1;i--){
cell = $("#tbl").find("tr").eq(i).find("td").eq(j);
if(cell.attr("style")!=undefined){
if(cell.attr("style")=="display:none"){
cell.remove();
}
}
}
}
}
</script>
</head>
<body>
<table id="tbl" cellpadding="3" border=1>
<thead>
<tr>
<td>销售时间</td>
<td>裙子</td>
<td>裤子</td>
<td>风衣</td>
<td>鞋子</td>
</tr>
</thead>
<tbody>
<tr>
<td>8:00-9:00</td>
<td>3</td>
<td></td>
<td>4</td>
<td></td>
</tr>
<tr>
<td>9:00-10:00</td>
<td>3</td>
<td>2</td>
<td>5</td>
<td>3</td>
</tr>
<tr>
<td>10:00-11:00</td>
<td>3</td>
<td>2</td>
<td></td>
<td>1</td>
</tr>
<tr>
<td>11:00-12:00</td>
<td></td>
<td></td>
<td></td>
<td>1</td>
</tr>
</tbody>
</table>
<input type="button" value="合并" id="merge" onclick="merge2();">
</body>
</html>
Summary: When using remove, be sure to note that if you cycle from the beginning of the list, after removing an element, some elements will not be found or are not looking for. that element; it’s best to loop from the back.
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