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var truncatedLength = 38; // set this to whatever you prefer
var table;
var origDataMap = new Map(); // the original (full) data for long text
$(document).ready(function() {
table = $('#TableName').DataTable({
columnDefs: [{
targets: ['_all'],
render: function(data, type, row, meta) {
// sets up initially minimized text for content longer than truncatedLength:
var api = new $.fn.dataTable.Api(meta.settings);
var node = api.cell(meta.row, meta.col, {
order: 'index'
}).node();
var hasToggler = $(node).children().length > 0;
if (type === 'display' && !hasToggler && data.length > truncatedLength + 5) {
origDataMap.set(meta.row + '-' + meta.col, data);
var displayData = '<span>' + data.substr(0, truncatedLength) + '... </span>' +
'<button class="moreless-button" data-state="trunc"' +
' onclick="showMoreOrLess(this, ' + meta.row + ', ' + meta.col + ')">more</button>';
return displayData;
} else {
return data;
}
}
}]
});
});
//
// toggles the DOM table cell's contents (but it
// does not change the underlying DataTables data):
//
function showMoreOrLess(node, rowId, colId) {
var displayData;
var state = $(node).attr('data-state');
var origData = origDataMap.get(rowId + '-' + colId);
var cellNode = $(node).parent();
if (state === 'trunc') {
displayData = '<span>' + origData + ' </span>' +
'<button class="moreless-button" data-state="full"' +
' onclick="showMoreOrLess(this, ' + rowId + ', ' + colId + ')">less</button>';
} else {
displayData = '<span>' + origData.substr(0, truncatedLength) + '... </span>' +
'<button class="moreless-button" data-state="trunc"' +
' onclick="showMoreOrLess(this, ' + rowId + ', ' + colId + ')">more</button>';
}
cellNode.html(displayData);
}
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