Add improved docs

Author: wooorm

readme.md

@@ -8,52 +8,103 @@
 [![Backers][backers-badge]][collective]
 [![Chat][chat-badge]][chat]
 
-**[mdast][]** utility to get the plain text content of a node.
+[mdast][] utility to get the text content of a node.
 
-## Install
+## Contents
+
+*   [What is this?](#what-is-this)
+*   [When should I use this?](#when-should-i-use-this)
+*   [Install](#install)
+*   [Use](#use)
+*   [API](#api)
+    *   [`toString(node[, options])`](#tostringnode-options)
+*   [Types](#types)
+*   [Compatibility](#compatibility)
+*   [Security](#security)
+*   [Related](#related)
+*   [Contribute](#contribute)
+*   [License](#license)
+
+## What is this?
+
+This package is a tiny utility that gets the textual content of a node.
+
+## When should I use this?
+
+This utility is useful when you have a node, say a heading, and want to get the
+text inside it.
+
+This package does not serialize markdown, that’s what
+[`mdast-util-to-markdown`][mdast-util-to-markdown] does.
+
+Similar packages, [`hast-util-to-string`][hast-util-to-string] and
+[`hast-util-to-text`][hast-util-to-text], do the same but on [hast][].
 
-This package is [ESM only](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c):
-Node 12+ is needed to use it and it must be `import`ed instead of `require`d.
+## Install
 
-[npm][]:
+This package is [ESM only][esm].
+In Node.js (version 12.20+, 14.14+, or 16.0+), install with [npm][]:
 
 ```sh
 npm install mdast-util-to-string
 ```
 
+In Deno with [`esm.sh`][esmsh]:
+
+```js
+import {toString} from 'https://esm.sh/mdast-util-to-string@3'
+```
+
+In browsers with [`esm.sh`][esmsh]:
+
+```html
+<script type="module">
+  import {toString} from 'https://esm.sh/mdast-util-to-string@3?bundle'
+</script>
+```
+
 ## Use
 
 ```js
 import {unified} from 'unified'
-import remarkParse from 'remark-parse'
+import {fromMarkdown} from 'mdast-util-from-markdown'
 import {toString} from 'mdast-util-to-string'
 
-const tree = unified()
-  .use(remarkParse)
-  .parse('Some _emphasis_, **importance**, and `code`.')
+const tree = fromMarkdown('Some _emphasis_, **importance**, and `code`.')
 
 console.log(toString(tree)) // => 'Some emphasis, importance, and code.'
 ```
 
 ## API
 
-This package exports the following identifiers: `toString`.
+This package exports the identifier `toString`.
 There is no default export.
 
 ### `toString(node[, options])`
 
 Get the text content of a [node][] or list of nodes.
+Prefers the node’s plain-text fields, otherwise serializes its children, and if
+the given value is an array, serialize the nodes in it.
 
-The algorithm checks `value` of `node` and then `alt`.
-If no value is found, the algorithm checks the children of `node` and joins them
-(without spaces or newlines).
+##### `options`
 
-> This is not a markdown to plain-text library.
-> Use [`strip-markdown`][strip-markdown] for that.
+Configuration (optional).
 
 ###### `options.includeImageAlt`
 
-Whether to use `alt` (`boolean`, default: `true`)
+Whether to use `alt` (`boolean`, default: `true`).
+
+## Types
+
+This package is fully typed with [TypeScript][].
+It exports the type `Options`.
+
+## Compatibility
+
+Projects maintained by the unified collective are compatible with all maintained
+versions of Node.js.
+As of now, that is Node.js 12.20+, 14.14+, and 16.0+.
+Our projects sometimes work with older versions, but this is not guaranteed.
 
 ## Security
 
@@ -63,19 +114,15 @@ attacks.
 
 ## Related
 
-*   [`nlcst-to-string`](https://github.com/syntax-tree/nlcst-to-string)
-    — Get text content in nlcst
-*   [`hast-util-to-string`](https://github.com/wooorm/rehype-minify/tree/HEAD/packages/hast-util-to-string)
-    — Get text content in hast
+*   [`hast-util-to-string`](https://github.com/wooorm/rehype-minify/tree/main/packages/hast-util-to-string)
+    — get text content in hast
 *   [`hast-util-to-text`](https://github.com/syntax-tree/hast-util-to-text)
-    — Get text content in hast according to the `innerText` algorithm
-*   [`hast-util-from-string`](https://github.com/wooorm/rehype-minify/tree/HEAD/packages/hast-util-from-string)
-    — Set text content in hast
+    — get text content in hast according to the `innerText` algorithm
 
 ## Contribute
 
-See [`contributing.md` in `syntax-tree/.github`][contributing] for ways to get
-started.
+See [`contributing.md`][contributing] in [`syntax-tree/.github`][health] for
+ways to get started.
 See [`support.md`][support] for ways to get help.
 
 This project has a [code of conduct][coc].
@@ -116,22 +163,34 @@ abide by its terms.
 
 [npm]: https://docs.npmjs.com/cli/install
 
+[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
+
+[esmsh]: https://esm.sh
+
+[typescript]: https://www.typescriptlang.org
+
 [license]: license
 
 [author]: https://wooorm.com
 
-[contributing]: https://github.com/syntax-tree/.github/blob/HEAD/contributing.md
+[health]: https://github.com/syntax-tree/.github
+
+[contributing]: https://github.com/syntax-tree/.github/blob/main/contributing.md
 
-[support]: https://github.com/syntax-tree/.github/blob/HEAD/support.md
+[support]: https://github.com/syntax-tree/.github/blob/main/support.md
 
-[coc]: https://github.com/syntax-tree/.github/blob/HEAD/code-of-conduct.md
+[coc]: https://github.com/syntax-tree/.github/blob/main/code-of-conduct.md
 
 [mdast]: https://github.com/syntax-tree/mdast
 
-[node]: https://github.com/syntax-tree/mdast#nodes
+[mdast-util-to-markdown]: https://github.com/syntax-tree/mdast-util-to-markdown
 
-[strip-markdown]: https://github.com/remarkjs/strip-markdown
+[hast]: https://github.com/syntax-tree/hast
 
-[xss]: https://en.wikipedia.org/wiki/Cross-site_scripting
+[hast-util-to-string]: https://github.com/rehypejs/rehype-minify/tree/main/packages/hast-util-to-string
 
-[hast]: https://github.com/syntax-tree/hast
+[hast-util-to-text]: https://github.com/syntax-tree/hast-util-to-text
+
+[node]: https://github.com/syntax-tree/mdast#nodes
+
+[xss]: https://en.wikipedia.org/wiki/Cross-site_scripting