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Add autocomplete stimulus controller
This allows us to specify `data-module="autocomplete"` on a `<select>` element to enhance it to an autocompleteapp/javascript/controllers/autocomplete_controller.js.
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import { Controller } from "@hotwired/stimulus"; | ||
import accessibleAutocomplete from "accessible-autocomplete"; | ||
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const enhanceOption = (option) => { | ||
return { | ||
name: option.label, | ||
append: option.getAttribute("data-append"), | ||
hint: option.getAttribute("data-hint"), | ||
}; | ||
}; | ||
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const suggestion = (value, options) => { | ||
const option = options.find(({ name }) => name === value); | ||
if (option) { | ||
const html = option.append ? `${value} – ${option.append}` : value; | ||
return option.hint | ||
? `${html}<br><span class="autocomplete__option-hint">${option.hint}</span>` | ||
: html; | ||
} else { | ||
return "No results found"; | ||
} | ||
}; | ||
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const autocomplete = ($module) => { | ||
if (!$module) { | ||
return; | ||
} | ||
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const params = $module.dataset; | ||
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const selectOptions = Array.from($module.options); | ||
const options = selectOptions.map((option) => enhanceOption(option)); | ||
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accessibleAutocomplete.enhanceSelectElement({ | ||
autoselect: params.autoselect === "true", | ||
defaultValue: params.defaultValue || "", | ||
displayMenu: params.displayMenu, | ||
minLength: params.minLength ? parseInt(params.minLength) : 0, | ||
selectElement: $module, | ||
showAllValues: params.showAllValues === "true", | ||
showNoOptionsFound: params.showNoOptionsFound === "true", | ||
templates: { | ||
suggestion: (value) => suggestion(value, options), | ||
}, | ||
onConfirm: (value) => { | ||
const selectedOption = [].filter.call( | ||
selectOptions, | ||
(option) => (option.textContent || option.innerText) === value, | ||
)[0]; | ||
if (selectedOption) selectedOption.selected = true; | ||
}, | ||
}); | ||
}; | ||
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// Connects to data-module="autocomplete" | ||
export default class extends Controller { | ||
connect() { | ||
autocomplete(this.element); | ||
} | ||
} |
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