Sourced from github.com/charmbracelet/huh's releases.

v0.5.0

This big news in this release is that forms in Huh can now be dynamic. Read on for more:

Dynamic Forms 🪄

huh? forms can now react to changes in other parts of the form. Replace properties such as Options, Title, Description with their dynamic counterparts: OptionsFunc, TitleFunc, and DescriptionFunc to recompute properties values on changes when watched variables change.

Let’s build a simple state / province picker.

var country string
var state string

The country select will be static, we’ll use this value to recompute the options and title for the next input.

huh.NewSelect[string]().
    Options(huh.NewOptions("United States", "Canada", "Mexico")...).
    Value(&country).
    Title("Country").

Define your Select with TitleFunc and OptionsFunc and bind them to the &country value from the previous field. Whenever the user chooses a different country, the TitleFunc and OptionsFunc will be recomputed.

[!IMPORTANT] We have to pass &country as the binding to recompute the function only when country changes, otherwise we will hit the API too often.

huh.NewSelect[string]().
    Value(&state).
    Height(8).
    TitleFunc(func() string {
        switch country {
        case "United States":
            return "State"
        case "Canada":
            return "Province"
        default:
            return "Territory"
        }
    }, &country).
    OptionsFunc(func() []huh.Option[string] {
        opts := fetchStatesForCountry(country)
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... (truncated)

• 1f1f7a2 Dynamic Inputs (#233)
• 34ae8b7 fix: Fix aborting a form returning a timeout error (#287)
• 90406d7 feat: introduce accessor
• 7958fda chore(deps): bump /spinner deps
• b1891d3 feat: Filtering on Select and MultiSelect fields (#283)
• 7923781 feat: set filtering state of select (#179)
• 79989f4 chore(deps): bump deps
• d7db017 feature suggestion: make callbacks configurable (#280)
• 5b41f0b feat(form): implement WithTimeout (#276)
• 463dcbc Layouts (#274)
• Additional commits viewable in compare view

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