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feat(types): export LanguageName utility type #386

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Merged
merged 1 commit into from
Oct 21, 2025
Merged

feat(types): export LanguageName utility type #386

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7 changes: 6 additions & 1 deletion scripts/build-languages.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -14,12 +14,13 @@ export async function buildLanguages() {
let base = "";
let baseTs = `
import type { LanguageFn } from "highlight.js";

interface LanguageType<TName extends string> {
name: TName;
register: LanguageFn;
}\n\n`;

let languageNamesUnion = "";
let lang: ModuleNames = [];

languages.forEach(async (name) => {
Expand All @@ -30,6 +31,7 @@ export async function buildLanguages() {

base += `export { default as ${moduleName} } from './${name}';\n`;
baseTs += `export declare const ${moduleName}: LanguageType<"${name}">;\n`;
languageNamesUnion += ` | "${name}"\n`;
lang.push({ name, moduleName });
markdown += `## ${name} (\`${moduleName}\`)

Expand Down Expand Up @@ -57,6 +59,9 @@ export { ${moduleName} as default } from "./";\n`,
});

await writeTo("src/languages/index.js", base);

baseTs += `\n\nexport type LanguageName =\n${languageNamesUnion};`;

await writeTo("src/languages/index.d.ts", baseTs);
await writeTo("SUPPORTED_LANGUAGES.md", markdown);

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2 changes: 1 addition & 1 deletion src/index.d.ts
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Expand Up @@ -2,4 +2,4 @@ export { default as Highlight, default as default } from "./Highlight.svelte";
export { default as HighlightAuto } from "./HighlightAuto.svelte";
export { default as HighlightSvelte } from "./HighlightSvelte.svelte";
export { default as LineNumbers } from "./LineNumbers.svelte";
export type { LanguageType } from "./languages";
export type { LanguageType, LanguageName } from "./languages";