Filtering Dropdown Options based on Another Dropdown

Hi,

You know how many car buying websites have dropdowns that allow you to select the Make and Model of the car you want?

How can I make this, except that the “model” dropdown only shows options for the preselected make?

For example, user selects/types “Honda” and then sees the dropdown options “CRV,” “Accord,” etc. [He wouldn’t see “Camry” etc.]

Both dropdowns are on one page, side by side.

For example, look at this website:

Thank you!

And remember to check “Ignore empty constraints” if you want to display all cars while the user hasn’t selected any maker.
image

where am I defining what car model belongs to what manufacturer?

Option Sets.

1 for Manufacturers.
1 for Models, that refers to Manufacturers

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