<li><code>group_dateString</code> option which is a function that allows you to format the date string when using the <code>group-date</code> header class name. This is the default function:
Other functions that can be used are <code>date</code> (alone), <code>date.toLocaleString()</code>, <code>date.toLocaleDateString()</code> or <code>d.toLocaleTimeString()</code>. See <ahref="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date#Conversion_getter">this reference</a> for more details.</li>
<li>In <spanclass="version">v2.13</span>, added <code>group_separator</code> option &<code>group-separator-#</code> header class name. To see this in action, check out the <ahref="example-parsers-file-type.html">file type parser demo</a>.</li>
<li><code>group_collapsible</code> (<code>true</code>) - when <code>true</code>, the group headers become clickable and collapse the rows below it.</li>
<li><code>group_collapsed</code> (<code>false</code>) - when <code>true</code> and <code>group_collapsible</code> is also <code>true</code>, all groups will start collapsed (<spanclass="version">v2.11</span>).</li>
<li><code>group_count</code> (<code>" ({num})"</code>) - allows you to add custom formatting, or remove, the group count within the group header. Set it to <code>false</code> or an empty string to remove the count.</li>
<li><code>group_callback</code> (<code>null</code>) - use this function to further modify the group header to include more information (i.e. group totals). Parameters include (<code>$cell, $rows, column, table</code>). See the example below for more details <spanclass="version">v2.12</span>.
<li><code>group_complete</code> (<code>"groupingComplete"</code>) - event triggered on the table when the grouping widget has finished work <spanclass="version">v2.12</span>.</li>
<li><code>group_formatter</code> (<code>null</code>) - use this function to modify the group header text before it gets applied. It provides various parameters (<code>txt, col, table, c, wo</code>) to make it work for any of the table columns and data. See the comments in the example below for more details.
<ul>
<li><code>txt</code> - current text of the group header.</li>
<li><code>col</code> - current table column being grouped (zero-based index).</li>
<li><code>table</code> - current table (DOM).</li>
<li><code>c</code> - table data from <code>table.config</code>.</li>
<li><code>wo</code> - table widget options from <code>table.config.widgetOptions</code>.</li>
<li><code>group_separator</code> (<code>"-"</code>) - when the <code>group-separator</code> class name is added, it uses the setting from this option to split the table cell content for grouping <spanclass="version">v2.13</span>.</li>
<li><code>group_week</code> (<code>[ "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" ]</code>) - Named days of the week.</li>
<li><code>group_time</code> (<code>[ "AM", "PM" ]</code>) - Time of day.</li>
<h3>Group header class names (when changing the grouping, notice that the <em>sort doesn't change, just the position and names of the group headers</em>):</h3>
<li><code>"group-word"</code> (same as <code>"group-word-1"</code>) - group the rows using the first word it finds in the column's parsed data.</li>
<li><code>"group-word-n"</code> (<code>"n"</code> can be any number) - group the rows using the nth word in the column<spanclass="remark">*</span>.</li>
<li><code>"group-separator"</code> (same as <code>"group-separator-1"</code>) - group the rows using the text between the start and first separator that it finds in the column's parsed data (<spanclass="version">v2.13</span>).</li>
<li><code>"group-separator-n"</code> (<code>"n"</code> can be any number) - group the rows using the nth separated group in the column (<spanclass="version">v2.13</span>)<spanclass="remark">*</span>.</li>
<li><code>"group-letter"</code> (same as <code>"group-letter-1"</code>) - group the rows using the first letter it finds in the column's parsed data.</li>
<li><code>"group-letter-n"</code> (<code>"n"</code> can be any number) - group the rows using letters 1 through n (if n = 2, then it's the first 2 letters) in the column's parsed data.</li>
<li><code>"group-number"</code> (same as <code>"group-number-1"</code>) - group the rows by the number it finds in the column (step of one).</li>
<li><code>"group-number-n"</code> (<code>"n"</code> can be any number) - group the rows into blocks of every n values. So, if n = 10, the groups will be 0-9, 10-19, 20-29, etc</li>
<li><code>"group-date"</code> - group the rows by full date (this shows the current UTC time corrected for your time zone)</li>
<li><code>"group-date-year"</code> - group the rows by year</li>
<li><code>"group-date-month"</code> - group the rows by month<spanclass="remark">*</span></li>
<li><code>"group-date-day"</code> - group the rows by month/day<spanclass="remark">*</span></li>
<li><code>"group-date-week"</code> - group the rows by day of the week<spanclass="remark">*</span></li>
<li><code>"group-date-time"</code> - group the rows by time<spanclass="remark">*</span></li>
<li><code>"group-false"</code> - disable grouping of rows for a column (<spanclass="version">v2.11</span>).</li>
<spanclass="remark">*</span> When sorting some columns, different group headers with the same group name may exist (try "group-date-week" and "group-date-time"). To make these columns sort specifically by the group you want, you'll need to modify the parser.
