<?php 
/*
 ==================
 Ajax Search
======================	 
*/
// add the ajax fetch js
add_action( 'wp_footer', 'ajax_fetch' );
function ajax_fetch() {
?>
<script type="text/javascript">
function fetch(){

    jQuery.ajax({
        url: '<?php echo admin_url('admin-ajax.php'); ?>',
        type: 'post',
        data: { action: 'data_fetch', keyword: jQuery('#keyword').val() },
        success: function(data) {
            jQuery('#datafetch').html( data );
        }
    });

}
</script>

add_action( 'wp_footer', 'ajax_fetch' );
function ajax_fetch() {
?>
<script type="text/javascript">
	
	function khFunction(){ // on focusout rest inpput field value
	            jQuery('#datafetch').html( " " );
       }
	
    function fetch(){

	//test if there is at least to caracters on the input field 
      if(jQuery('#keyword').val().length > 2){
			
		
    jQuery.ajax({
        url: '<?php echo admin_url('admin-ajax.php'); ?>',
        type: 'post',
        data: { action: 'data_fetch', keyword: jQuery('#keyword').val() },
        success: function(data) {
            jQuery('#datafetch').html( data );
        }
    }); }

}
</script>

<?php
}

// the ajax function
add_action('wp_ajax_data_fetch' , 'data_fetch');
add_action('wp_ajax_nopriv_data_fetch','data_fetch');
function data_fetch(){

    $the_query = new WP_Query( array( 
		'posts_per_page' => -1, 
		's' => esc_attr( $_POST['keyword'] ),
		'category_name' => 'top-apps', 'post_type' => array('post') ) );
	
    if( $the_query->have_posts() ) :
        echo '<ul>';
        while( $the_query->have_posts() ): $the_query->the_post(); ?>

            <li><a href="<?php echo esc_url( post_permalink() ); ?>"><?php the_title();?></a></li>

        <?php endwhile;
       echo '</ul>';
        wp_reset_postdata();  
    endif;

    die();
}