luci-base: cbi: optimize tab hide logic

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

diff --git a/modules/luci-base/htdocs/luci-static/resources/cbi.js b/modules/luci-base/htdocs/luci-static/resources/cbi.js
index 3e71f17..2274610 100644 (file)
--- a/modules/luci-base/htdocs/luci-static/resources/cbi.js
+++ b/modules/luci-base/htdocs/luci-static/resources/cbi.js
@@ -947,9 +947,8 @@ function cbi_t_update() {
                {
                        var t = cbi_t[sid][tid].tab;
                        var c = cbi_t[sid][tid].container;
-                       var n = c.getElementsByTagName('div');
 
-                       if (n.length === 0) {
+                       if (!c.firstElementChild) {
                                t.style.display = 'none';
                        }
                        else if (t.style.display == 'none') {