ionic-framework/scss/ionic/structure/_base.scss

// TODO: This might be inefficient?

// Make sure iOS Safari doesn't scale fonts on orientation changes
html {
  -webkit-text-size-adjust: 100%;

  @include disable-user-select();
}

body {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
  word-wrap: break-word;
  text-rendering: optimizeLegibility;

  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: none;
          text-size-adjust: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-overflow-scrolling: touch;
}

.view {
  width: 100%;
  height: 100%;
}

.content {
  position: fixed;
  overflow: auto; 
  right: 0;
  left: 0;
}
/* Hack to force all relatively and absolutely positioned elements still render while scrolling
   Note: This is a bug for "-webkit-overflow-scrolling: touch" (via ratchet) */
.content > *, .content-padded > * {
  -webkit-transform: translateZ(0px);
          transform: translateZ(0px);
}

.content-padded {
  padding: $contentPadding;
}

.inset {
  margin: $insetMargin;
}

.rounded {
  border-radius: $roundedRadius;
}

// Remove tap highlight color on Safari
a {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

.page, .full-section {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  background-color: #fff;
}