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@mapbox/mapbox-gl-style-spec

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a specification for mapbox gl styles

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export default class Collator { locale: string | null; sensitivity: 'base' | 'accent' | 'case' | 'variant'; collator: Intl.Collator; constructor(caseSensitive: boolean, diacriticSensitive: boolean, locale: string | null) { if (caseSensitive) this.sensitivity = diacriticSensitive ? 'variant' : 'case'; else this.sensitivity = diacriticSensitive ? 'accent' : 'base'; this.locale = locale; this.collator = new Intl.Collator(this.locale ? this.locale : [], {sensitivity: this.sensitivity, usage: 'search'}); } compare(lhs: string, rhs: string): number { return this.collator.compare(lhs, rhs); } resolvedLocale(): string { // We create a Collator without "usage: search" because we don't want // the search options encoded in our result (e.g. "en-u-co-search") return new Intl.Collator(this.locale ? this.locale : []) .resolvedOptions().locale; } }