Module front_matter/mod

Extracts front matter from strings. Adapted from jxson/front-matter.

Supported formats

JSON

import { test, extractJson } from "@std/front-matter";
import { assertEquals } from "@std/assert";

const str = "---json\n{\"and\": \"this\"}\n---\ndeno is awesome";

assertEquals(test(str), true);
assertEquals(extractJson(str), {
  frontMatter: "{\"and\": \"this\"}",
  body: "deno is awesome",
  attrs: { and: "this" }
});
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extract and test support the following delimiters.

---json
{
  "and": "this"
}
---
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{
  "is": "JSON"
}
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TOML

import { test, extractToml } from "@std/front-matter";
import { assertEquals } from "@std/assert";

const str = "---toml\nmodule = 'front_matter'\n---\ndeno is awesome";

assertEquals(test(str), true);
assertEquals(extractToml(str), {
  frontMatter: "module = 'front_matter'",
  body: "deno is awesome",
  attrs: { module: "front_matter" }
});
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extract and test support the following delimiters.

---toml
this = 'is'
---
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= toml =
parsed = 'as'
toml = 'data'
= toml =
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+++
is = 'that'
not = 'cool?'
+++
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YAML

import { test, extractYaml } from "@std/front-matter";
import { assertEquals } from "@std/assert";

const str = "---yaml\nmodule: front_matter\n---\ndeno is awesome";

assertEquals(test(str), true);
assertEquals(extractYaml(str), {
  frontMatter: "module: front_matter",
  body: "deno is awesome",
  attrs: { module: "front_matter" }
});
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extract and test support the following delimiters.

---
these: are
---
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---yaml
all: recognized
---
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= yaml =
as: yaml
= yaml =
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