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JavaScript
HTML
CSS

var drawer = new CupertinoPane('ion-drawer', { 
    parentElement: 'body',
    backdrop: true,
    breaks: {
      middle: { enabled: true, height: 350 }
    },
    zStack: {
      pushElements: ['ion-content'],
      minPushHeight: 350,
    }
});

window.onload = async function () {
  await document.querySelector('ion-app').componentOnReady();
  presentDrawer();
}

async function presentDrawer() {
  drawer.present({animate: true});
};

async function destroyDrawer() {
  drawer.destroy({animate: true});
};

async function hideDrawer() {
  drawer.hide();
};

async function isHiddenDrawer() {
    console.log(await drawer.isHidden());
};

async function setTopDrawer() {
  drawer.moveToBreak('top');
};

async function setMiddleDrawer() {
  drawer.moveToBreak('middle');
};

async function setBottomDrawer() {
  drawer.moveToBreak('bottom');
};

<!DOCTYPE html>
<html dir="ltr" mode="ios">
<body>
  <ion-app>
    <ion-content>
        <ion-drawer> 
          <h1>Header</h1>
          <p hide-on-bottom>Content</p> 
        </ion-drawer>

        <ion-button expand="block" color="danger" onclick="presentDrawer()">Present Drawer</ion-button>
        <ion-button expand="block" color="danger" onclick="destroyDrawer()">Destroy Drawer</ion-button>
        <ion-button expand="block" onclick="hideDrawer()">Hide Drawer</ion-button>
        <ion-button expand="block" onclick="isHiddenDrawer()">Drawer is hidden</ion-button>
        <ion-button expand="block" color="secondary" onclick="setTopDrawer()">Set Top</ion-button>
        <ion-button expand="block" color="secondary" onclick="setMiddleDrawer()">Set Middle</ion-button>
        <ion-button expand="block" color="secondary" onclick="setBottomDrawer()">Set Bottom</ion-button>
    </ion-content>
  </ion-app>

</body>
</html>

ion-drawer {padding: 0 20px;}