Flash menu on page reload fix

[Janvier123]

Just a quick fix for the flashing menu when page reloads.

Example:
.topbar-nav .metismenu > li > ul { position: absolute; top: 100%; min-width: 100%; z-index: 1001; display: none; background: #1e1e1e; box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, .15); }

Or just add "display: none;" to your css

Source: https://stackoverflow.com/questions/10237037/entire-drop-down-menu-quickly-flashes-upon-page-load

Greetz

[lee-peter24]

I've a solution after inspected from browser to solve a flashing in the metismenu when reloading another page.
Step:

• replace .metismenu .mm-collapse:not(.mm-show){display:none} at metisMenu.css with
  .metismenu > li:not(.mm-active) > ul:not(.mm-collapse.mm-show) { display:none; }

Note: The version I used was 3.0.7.