ionic-framework/ionic/components/toolbar/toolbar.scss

// Navbar
// --------------------------------------------------

$toolbar-order: (
  title: 20,
  primary: 30,
  secondary: 40
);


ion-toolbar {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.toolbar-inner {
  width: 100%;
}

.toolbar-title {
  flex: 1;
  order: map-get($toolbar-order, 'title');

  display: flex;
  align-items: center;
  margin: 0 0 2px;
}

.toolbar-primary-item {
  order: map-get($toolbar-order, 'primary');
}

.toolbar-secondary-item {
  order: map-get($toolbar-order, 'secondary');
}

ion-toolbar ion-title {
  display: block;
  overflow: hidden;
}

.toolbar-inner-title {
  width: 100%;
  padding: 0 15px;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.toolbar button,
.toolbar [button] {
  background: transparent;
  border: none;
}

.toolbar-title-hide {
  opacity: 0;
}