Datatable JSON export module for Buttons extension

json_export_datatables.js

DataTable.ext.buttons.json = {
	bom: false,
	className: 'buttons-json buttons-jsonhtml5',
	available: function () {
		return window.FileReader !== undefined && window.Blob;
	},
	text: function ( dt ) {
		return 'JSON';
	},
	action: function ( e, dt, button, config ) {
		this.processing( true );
		var data = dt.buttons.exportData();

		var JSONData = [];
		var keys = data.header;
		for (var i=0; i<data.body.length; i++) {
			var d = {}
			for (var j=0; j<data.body[i].length; j++) {
				d[keys[j]] = data.body[i][j];
			}
			JSONData.push(d);
		}

		$.fn.dataTable.fileSave(
			new Blob([JSON.stringify(JSONData, null, 2)]),
			_filename(config)
		);

		this.processing( false );
	},

	filename: '*',
	extension: '.json',
};