With this extension you can make product options dependent on each other.

Live demo
Admin Product Form
Front-end Product Page

New fields Parent option and Parent option values at the admin product form, Option tab, are used to create related options.

In front-end, product page the related options are shown only after their parent option values. Actually related options are available according to selected parent option values. for example you can show Small in Size option when Red is selected in Color option.

Features

• Unlimited dependent product options
  
• Multi level dependent options
  
• Dependent required options, a required option is required only if its parent option is selected

For OpenCart 4.0 you need to install vQmod.

Install Instructions
- Login to your OpenCart Administration panel
- Go to Extensions > Installer and upload zip file suited for your OpenCart version
- Go to Extensions > Extensions > module > Dependent Options > Install, enable and save.
- Go to Extensions > Modifications and click Refresh
- Go to Dashboard > Developer Settings (gear icon) > Refresh

Free Installation and Support

• sabeti05 [AT] gmail.com
• DigitCart Support

No core files are changed or replaced.