Issue with jQuery DataTables column.width setting failing to meet expectations

Currently, I am utilizing datatables for my project.

  1. According to the datatables documentation found here, it suggests using the columns.width option to manage column width.
  2. However, when I implement columns.width and render the table, it seems to disregard this specified width and uses its own default width instead.

For reference, here is the JSFIDDLE link: https://jsfiddle.net/bababalcksheep/bvgu0cL3/28/

  1. In order to test the functionality, I have created 2 columns with lengthy strings.
  2. The name column contains a long string without spaces.
  3. While the description column consists of a long string with spaces.
  4. I attempted to assign a width of 200px to the name column.

My Questions Are:

  1. What purpose does specifying columns.width serve if the table still decides on its width?

  2. Is there a way to successfully apply a 200px width to the name column and observe the changes in action?

JS Script:

$(document).ready(function() {
  var table = $('#example').DataTable({
    'autoWidth': false,
    'scrollX': 'true',
    'scrollY': 300,
    'scrollCollapse': true,
    columns: [{
      data: 'name',
      title: 'Long Name Issues',
      width:'200px',     
      render: function(data) {
        return  '<span class="">'+ data + '</span>';
      }
    }, {
      data: 'position',
      title: 'Position'
    }, {
      data: 'description',
      title: 'Long Description Issues',
      width:450,
      render: function(data) {
        return data;
      }
    }, {
      data: 'salary',
      title: 'Salary May have Big Title'
    }, {
      data: 'age',
      title: 'Age'
    }],
    data: [{
      name: 'DavidDavidDavidDavidDavidDavidDavidDavidDavidDavidDavidDavidDavidDavidDavidDavidDavid',
      position: 'CTO',
      description: 'CTO',
      salary: '1000',
      age: '44'
    }, {
      name: 'John',
      position: 'tech',
      description: 'description',
      salary: '1000',
      age: '22'
    }, {
      name: 'Amber',
      position: 'CEO',
      description: 'Some long description with spaces Some long description with spaces',
      salary: '1000',
      age: '45'
    }],
  });

});

Answer №1

The width property is mainly used for determining relative widths overall. In addition to that, you are also facing a problem with the word-wrap. To resolve this, create a CSS class and assign it to the column:

.px200 {
  width: 200px;
  max-width: 200px;
  word-wrap: break-word;
}
columns: [{
  data: 'name',
  title: 'Long Name Issues',
  className: 'px200', //<----
  render: function(data) {
    return  '<span class="">'+ data + '</span>';
  }
}

Check out the updated fiddle here -> https://jsfiddle.net/bvgu0cL3/30/

Instead of adding the class directly to the <th> and <td>'s using className, consider adding it to the <span> wrapping the content.

If you want complete control over the widths, refer to this answer -> jQuery DataTables fixed size for ONE of the columns?

Answer №2

Information sourced from @davidkonrad Presenting an alternative method below.

UPDATE: A plugin has been developed to implement specified css in columns dataTables.colStyle.js

usage:

// initialization
$('#example').DataTable({
  columnStyle: true // initialize the plugin
});
// use within columns as demonstrated here
columns: [{
  data: 'name',
  title: 'Name',
  css: {
    'width': 200,
    'min-width': 200,
    'word-wrap': 'break-word',
    'max-width': 200,
  }
}]

Pros:

  1. Utilizes the column.width option and applies css instead of classes
  2. No need to specify individual classes
  3. Makes use of createdRow callback for automation
  4. Ensures column titles are always displayed in a single line, preventing height stretching if table width is limited
  5. Minimum width of each column accommodates one-line display of title, adjusting as necessary even when set value is lower

Functional Fiddle example: https://jsfiddle.net/bababalcksheep/bvgu0cL3/42/

Additional suggestions welcome for further refinement

CSS:

/* Ensure all titles remain on a single line*/
.dataTable thead td,
.dataTable thead th {
  white-space: pre;
}

JS:

  var table = $('#example').DataTable({
     "createdRow": function(row, data, index) {
      var tableApi = this.api();
      var columns = tableApi.settings().init().columns;    
      var tds = $(row).find('td');
      tds.each(function(index) {
        var $td = $(this);
        var columnIndex = tableApi.column(this).index();
        //var columnIndex = tableApi.cell(this).index().column; 
        var hasWidth = columns[columnIndex].width;
        if (hasWidth) {
          $td.css({
            'width': hasWidth,
            'max-width': hasWidth,
            'min-width': hasWidth,//will enforce fixed width, skip if not required
            'word-wrap': 'break-word'
          });
        }
      });
    },
  });

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