You can make online purchases from the eMart through the following steps:

1. Access the eMart via OneNS.

2. Choose the item and quantity, then add them to your cart.

3. View your selected items by clicking on "Checkout" and confirm by clicking on "Place Order".

4. Select your preferred delivery mode and provide your contact details.

5. Verify your order before making payment.

6. You will see the transaction confirmation on your screen and an order confirmation email will be sent to your email.