ionic-framework/src/components/app/_scaffolding.scss

html {
  height: 100%;
}

[ion-app] {
  @include flex-display();
  @include flex-direction(column);

  overflow: hidden;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  margin: 0;
  padding: 0;

  .nav-viewport {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }

  .nav-viewport.tab {
    position: relative;
  }

  .nav-view {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }

  .pane {
    position: relative;
    height: 100%;
    width: 100%;

    @include flex-display();
    @include flex-direction(column);
    @include flex(1);
  }

  .view-cover {
    height: 100vh !important;

    .tab-bar {
      z-index: 1
    }
  }

  .pane > .pane-container {
    position: relative;
    overflow: hidden;

    @include flex-display();
    @include flex-order(40);
    @include flex(1);
    @include flex-direction(column);
  }

  .pane-container > .pane {
    position: absolute;
    min-height: 100%;
  }

  .pane > .pane-container > .content {
    position: relative;
    z-index: $z-index-content;
    @include flex(1);
  }

  .scroll-content {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    overflow-y: scroll;
    -webkit-overflow-scrolling: touch;
  }

}