CODEWITHSUNDEEP
javascripthtmljquerydomdom-events
user2448849
user2448849

Reputation: 37

How can I add onclick event to a table column?

I'm trying to add an onclick event to a table column using JavaScript. For example, an onclick event enabled on the first or second column! The following function is for rows, but I need to edit this function for specific columns.

function addRowHandlers() {
    var table = document.getElementById("tableId");
    var rows = table.getElementsByTagName("tr");
    for(i = 0; i < rows.length; i++) {
        var currentRow = table.rows[i];
        var createClickHandler = function (row) {
            return function () {
                var cell = row.getElementsByTagName("td")[0];
                var id = cell.innerHTML;
                alert("id:" + id);
            };
        };

        currentRow.onclick = createClickHandler(currentRow);
    }
}

Upvotes: 3

Views: 21149

Answers (4)

Anand Jha
Anand Jha

Reputation: 10714

Try this working soln.

function addRowHandlers() {
 var table = document.getElementById("tableId");
 var rows = table.getElementsByTagName("tr");
    
 for (i = 0; i < rows.length; i++) {
   var currentRow = table.rows[i];
   currentRow.onclick = createClickHandler(currentRow);
 }
}

function createClickHandler(row) {
  return function() { 
    var cell = row.getElementsByTagName("td")[0];// if you put 0 here then it will return first column of this row
    var id = cell.innerHTML;
    alert("id:" + id);
  };
}

addRowHandlers();

Working Demo

Upvotes: 3

chakroun yesser
chakroun yesser

Reputation: 1487

This is the code to return row and column number using jQuery, it must be helpful Jsfiddle link

$('td').on('click',function() {
                var col = $(this).parent().children().index($(this));
                var row = $(this).parent().parent().children().index($(this).parent());
                alert('Row: ' + row + ', Column: ' + col);
            });

Upvotes: 1

Stano
Stano

Reputation: 8939

You can attach only the single onclick handler to your table and then recognize the clicked column, this technique is called event delegation:

document.getElementById("tableId").onclick = columnHandler;

function columnHandler(e) {
    e = e || window.event; //for IE87 backward compatibility
    var t = e.target || e.srcElement; //IE87 backward compatibility
    while (t.nodeName != 'TD' && t.nodeName != 'TH' && t.nodeName != 'TABLE') {
        t = t.parentNode;
    }
    if (t.nodeName == 'TABLE') {
        return;
    }
    var c = t.parentNode.cells;
    var j = 0;
    for (var i=0; i<c.length; i++){
        if (c[i] == t) {
            j = i;
        }
    }
    alert('You clicked on row #'+(j+1)+ ' , cell content = '+t.innerHTML);
}

JSFiddle example

Upvotes: 0

gwillie
gwillie

Reputation: 1899

adding class to affected rows/columns would be more flexible.

if you know the rows/columns do something like this (untested), for rows 1 and 2:

var $table = jQuery('#tableId');
var $rows = jQuery('tr:nth-child(0),tr:nth-child(1)', $table);
$rows
    .addClass('event-1')
    .click(function()
    {
      // do what on click event
      alert(jQuery(this).html());
    });

Upvotes: 1

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