How to center buttons in ion-footer-bar?

Hey,

I know this post is pretty old but I am just starting with ionic and came across the same issue.

One solution I found was simply taken from another issue: Vertically center a button

HTML:

        <ion-footer-bar class="bar-stable button-footer-bar">
          <a class="button button-stable">Filtern</a>
        </ion-footer-bar>

CSS:

.button-footer-bar {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-box-direction: normal;
  -moz-box-direction: normal;
  -webkit-box-orient: horizontal;
  -moz-box-orient: horizontal;
  -webkit-flex-direction: row;
  -ms-flex-direction: row;
  flex-direction: row;
  -webkit-flex-wrap: nowrap;
  -ms-flex-wrap: nowrap;
  flex-wrap: nowrap;
  -webkit-box-pack: center;
  -moz-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-align-content: stretch;
  -ms-flex-line-pack: stretch;
  align-content: stretch;
  -webkit-box-align: center;
  -moz-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
}

Can someone say if there are any plattforms where this may not be working?