<% let leftCnt = page - 1, rightCnt = pageCnt - page, omitLeft = leftCnt > 4, omitRight = rightCnt > 4; if (omitLeft) leftCnt = 3; if (omitRight) rightCnt = 3; if (omitLeft) { %>
• ...
<% } for (let i = page - leftCnt; i < page; i++) { %>
• <%= i %>
<% } %>
• <%= page %>
<% for (let i = page + 1; i <= page + rightCnt; i++) { %>
• <%= i %>
<% } if (omitRight) { %>
• ...
<% } %>