Add exports of one and all

Closes GH-64.

Co-authored-by: liwenfu <[email protected]>
Reviewed-by: Titus Wormer <[email protected]>

Author: 李文富

index.js

@@ -20,6 +20,9 @@ import {one} from './lib/one.js'
 import {handlers} from './lib/handlers/index.js'
 import {own} from './lib/util/own.js'
 
+export {one} from './lib/one.js'
+export {all} from './lib/all.js'
+
 var block = convert(['heading', 'paragraph', 'root'])
 
 /**

readme.md

@@ -237,6 +237,18 @@ Yields:
 Some text with <svg viewBox="0 0 1 1" width="1" height="1"><rect fill="black" x="0" y="0" width="1" height="1"></rect></svg> a graphic… Wait is that a dead pixel?
 ```
 
+### `all(h, parent)`
+
+Helper function for writing custom handlers passed to `options.handlers`.
+Pass it `h` and a parent node (hast) and it will turn the node’s children into
+an array of transformed nodes (mdast).
+
+### `one(h, node, parent)`
+
+Helper function for writing custom handlers passed to `options.handlers`.
+Pass it `h`, a `node`, and its `parent` (hast) and it will turn `node` into
+mdast content.
+
 ## Security
 
 Use of `hast-util-to-mdast` can open you up to a

test/index.js

@@ -18,10 +18,24 @@ import rehypeStringify from 'rehype-parse'
 import remarkStringify from 'remark-stringify'
 import assert from 'mdast-util-assert'
 import {removePosition} from 'unist-util-remove-position'
-import {toMdast} from '../index.js'
+import {one, all, toMdast} from '../index.js'
 
 var fixtures = path.join('test', 'fixtures')
 
+test('exports', function (t) {
+  t.assert(
+    one,
+    'should export `one`'
+  )
+
+  t.assert(
+    all,
+    'should export `all`'
+  )
+
+  t.end()
+})
+
 test('core', function (t) {
   t.deepEqual(
     toMdast(u('root', [h('strong', 'Alpha')])),