jQuery: How to count table columns?

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天命终不由人 2020-12-28 13:20

Using jQuery, how would you figure out how many columns are in a table?




        
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                   囚心锁ツ
                                             
                
                
                (楼主)
            
              
              
                2020-12-28 13:34
              

            
            
                        
You have to set an ID to the header row:


         


        
      
      
      

    
        spans one column
        spans two columns
        spans three columns



And then you can use the following function:

function getColumnCount(headerRowId) {
    var columnCount = 0;
    $('#' + headerRowId + ' > td').each(function() {
        var colspanValue = $(this).attr('colspan');
        if (colspanValue == undefined) {
            columnCount++;
        } else {
            columnCount = columnCount + parseInt(colspanValue);
        }
    });
    return columnCount;
}