attach = function( container, buttons ) {
		var i, ien, node, button;
		var clickHandler = function ( e ) {
			e.preventDefault();
			if ( !$(e.currentTarget).hasClass('disabled') && api.page() != e.data.action ) {
				api.page( e.data.action ).draw( 'page' );
			}
		};

		for ( i=0, ien=buttons.length ; i<ien ; i++ ) {
			button = buttons[i];

			if ( $.isArray( button ) ) {
				attach( container, button );
			}
			else {
				btnDisplay = '';
				btnClass = '';

				switch ( button ) {
					case 'ellipsis':
						btnDisplay = '&#x2026;';
						btnClass = 'disabled';
						break;

					case 'first':
						btnDisplay = lang.sFirst;
						btnClass = button + (page > 0 ?
							'' : ' disabled');
						break;

					case 'previous':
						btnDisplay = lang.sPrevious;
						btnClass = button + (page > 0 ?
							'' : ' disabled');
						break;

					case 'next':
						btnDisplay = lang.sNext;
						btnClass = button + (page < pages-1 ?
							'' : ' disabled');
						break;

					case 'last':
						btnDisplay = lang.sLast;
						btnClass = button + (page < pages-1 ?
							'' : ' disabled');
						break;

					default:
						btnDisplay = button + 1;
						btnClass = page === button ?
							'active' : '';
						break;
				}

				if ( btnDisplay ) {
					node = $('<li>', {
							'class': classes.sPageButton+' '+btnClass,
							'id': idx === 0 && typeof button === 'string' ?
								settings.sTableId +'_'+ button :
								null
						} )
						.append( $('<a>', {
								'href': '#',
								'aria-controls': settings.sTableId,
								'aria-label': aria[ button ],
								'data-dt-idx': counter,
								'tabindex': settings.iTabIndex,
								'class': 'page-link'
							} )
							.html( btnDisplay )
						)
						.appendTo( container );

					settings.oApi._fnBindAction(
						node, {action: button}, clickHandler
					);

					counter++;
				}
			}
		}
	}
DataTables integration for Bootstrap 4. This requires Bootstrap 4 and
DataTables 1.10 or newer.

This file sets the defaults and adds options to DataTables to style its
controls using Bootstrap. See http://datatables.net/manual/styling/bootstrap
for further information.