Add a key debouce delay to the global filtering input of a table

Enables filtration delay for keeping the browser more responsive while searching for a longer keyword.

This can be particularly useful when working with server-side processing, where you wouldn't typically want an Ajax request to be made with every key press the user makes when searching the table.

Please note that this plug-in has been deprecated and the dt-init searchDelay option in DataTables 1.10 should now be used. This plug-in will not operate with v1.10+.

Plug-in code

jQuery.fn.dataTableExt.oApi.fnSetFilteringDelay = function ( oSettings, iDelay ) {
    var _that = this;

    if ( iDelay === undefined ) {
        iDelay = 250;

    this.each( function ( i ) {
            if ( typeof _that.fnSettings().aanFeatures.f !== 'undefined' )
            $.fn.dataTableExt.iApiIndex = i;
                oTimerId = null,
                sPreviousSearch = null,
                anControl = $( 'input', _that.fnSettings().aanFeatures.f );
            anControl.unbind( 'keyup search input' ).bind( 'keyup search input', function() {
                if (sPreviousSearch === null || sPreviousSearch != anControl.val()) {
                    sPreviousSearch = anControl.val();
                    oTimerId = window.setTimeout(function() {
                        $.fn.dataTableExt.iApiIndex = i;
                        _that.fnFilter( anControl.val() );
                    }, iDelay);
            return this;
    } );
    return this;


This plug-in is available on the DataTables CDN:


Note that if you are using multiple plug-ins, it is beneficial in terms of performance to combine the plug-ins into a single file and host it on your own server, rather than making multiple requests to the DataTables CDN.

Version control

If you have any ideas for how this plug-in can be improved, or spot anything that is in error, it is available on GitHub and pull requests are very welcome!


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