new tab to link function JS

add_action('wp_head',function (){
    ?>
    <script>
    jQuery(function($) {
    $( document ).ready(function() {
        var links = document.getElementsByClassName('jeg_btn-whatsapp ');
        var len = links.length;

        for(var i=0; i<len; i++)
        {
        links[i].target = "_blank";
        }
    });
});
    </script>
    <?php
},99);