showattachments

<script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.3.1.min.js"></script>
<script type="text/javascript">
(function () {

    var attachmentsFiledContext = {};

    attachmentsFiledContext.Templates = {};

    attachmentsFiledContext.Templates.Fields = {
         
        "Attachments": { "View": AttachmentsFiledTemplate }
    };

    SPClientTemplates.TemplateManager.RegisterTemplateOverrides(attachmentsFiledContext);

})();

function AttachmentsFiledTemplate(ctx) {
    var itemId = ctx.CurrentItem.ID;
    var listName = ctx.ListTitle;       
    return getAttachments(listName, itemId);
}

function getAttachments(listName,itemId) {
  
    var url = _spPageContextInfo.webAbsoluteUrl;
    var requestUri = url + "/_api/web/lists/getbytitle('" + listName + "')/items(" + itemId + ")/AttachmentFiles";
    var str = "";
    $.ajax({
        url: requestUri,
        type: "GET",
        headers: { "ACCEPT": "application/json;odata=verbose" },
        async: false,
        success: function (data) {
            for (var i = 0; i < data.d.results.length; i++) {
                str += "<a href='" + data.d.results[i].ServerRelativeUrl + "'>" + data.d.results[i].FileName + "</a>";
                if (i != data.d.results.length - 1) {
                    str += "<br/>";
                }                
            }          
        },
        error: function (err) {
        }
    });
    return str;
}
</script>