+ var headerWidth = 0,
+ compactWidth = 0;
+
+ function updateHeader() {
+ var windowWidth = $(window).width();
+
+ if (windowWidth < compactWidth) {
+ $("body").removeClass("compact-nav").addClass("small-nav");
+ } else if (windowWidth < headerWidth) {
+ $("body").addClass("compact-nav").removeClass("small-nav");
+ } else {
+ $("body").removeClass("compact-nav").removeClass("small-nav");
+ }
+ }
+
+ /*
+ * Chrome 60 and later seem to fire the "ready" callback
+ * before the DOM is fully ready causing us to measure the
+ * wrong sizes for the header elements - use a 0ms timeout
+ * to defer the measurement slightly as a workaround.
+ */
+ setTimeout(function () {
+ $("header").children(":visible").each(function (i, e) {
+ headerWidth = headerWidth + $(e).outerWidth();
+ });
+
+ $("body").addClass("compact-nav");
+
+ $("header").children(":visible").each(function (i, e) {
+ compactWidth = compactWidth + $(e).outerWidth();
+ });
+
+ $("body").removeClass("compact-nav");
+
+ updateHeader();
+
+ $(window).resize(updateHeader);
+ }, 0);