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131 lines
2.6 KiB
TypeScript
131 lines
2.6 KiB
TypeScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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// Copyright (c) Jason Campbell. MIT license
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/**
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* Extracts
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* {@link https://daily-dev-tips.com/posts/what-exactly-is-frontmatter/ | front matter}
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* from strings. Adapted from
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* {@link https://github.com/jxson/front-matter/blob/36f139ef797bd9e5196a9ede03ef481d7fbca18e/index.js | jxson/front-matter}.
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*
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* ## Supported formats
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*
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* ### JSON
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*
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* ```ts
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* import { test, extractJson } from "@std/front-matter";
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* import { assertEquals } from "@std/assert";
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*
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* const str = "---json\n{\"and\": \"this\"}\n---\ndeno is awesome";
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*
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* assertEquals(test(str), true);
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* assertEquals(extractJson(str), {
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* frontMatter: "{\"and\": \"this\"}",
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* body: "deno is awesome",
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* attrs: { and: "this" }
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* });
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* ```
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*
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* {@linkcode extractJson | extract} and {@linkcode test} support the following
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* delimiters.
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*
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* ```markdown
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* ---json
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* {
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* "and": "this"
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* }
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* ---
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* ```
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*
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* ```markdown
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* {
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* "is": "JSON"
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* }
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* ```
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*
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* ### TOML
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*
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* ```ts
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* import { test, extractToml } from "@std/front-matter";
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* import { assertEquals } from "@std/assert";
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*
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* const str = "---toml\nmodule = 'front_matter'\n---\ndeno is awesome";
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*
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* assertEquals(test(str), true);
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* assertEquals(extractToml(str), {
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* frontMatter: "module = 'front_matter'",
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* body: "deno is awesome",
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* attrs: { module: "front_matter" }
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* });
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* ```
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*
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* {@linkcode extractToml | extract} and {@linkcode test} support the following
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* delimiters.
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*
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* ```markdown
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* ---toml
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* this = 'is'
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* ---
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* ```
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*
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* ```markdown
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* = toml =
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* parsed = 'as'
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* toml = 'data'
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* = toml =
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* ```
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*
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* ```markdown
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* +++
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* is = 'that'
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* not = 'cool?'
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* +++
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* ```
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*
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* ### YAML
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*
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* ```ts
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* import { test, extractYaml } from "@std/front-matter";
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* import { assertEquals } from "@std/assert";
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*
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* const str = "---yaml\nmodule: front_matter\n---\ndeno is awesome";
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*
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* assertEquals(test(str), true);
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* assertEquals(extractYaml(str), {
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* frontMatter: "module: front_matter",
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* body: "deno is awesome",
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* attrs: { module: "front_matter" }
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* });
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* ```
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*
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* {@linkcode extractYaml | extract} and {@linkcode test} support the following
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* delimiters.
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*
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* ```front_matter
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* ---
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* these: are
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* ---
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* ```
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*
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* ```markdown
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* ---yaml
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* all: recognized
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* ---
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* ```
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*
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* ```markdown
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* = yaml =
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* as: yaml
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* = yaml =
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* ```
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*
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* @module
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*/
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import { extract as extractJson } from "./json.ts";
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import { extract as extractToml } from "./toml.ts";
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import { extract as extractYaml } from "./yaml.ts";
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export * from "./test.ts";
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export * from "./types.ts";
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export { extractJson, extractToml, extractYaml };
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