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+# unist-util-visit [![Build Status][build-badge]][build-page] [![Coverage Status][coverage-badge]][coverage-page]
+
+[Unist][] node visitor.  Useful with working with [**remark**][remark],
+[**retext**][retext], or [**rehype**][rehype].
+
+## Installation
+
+[npm][]:
+
+```bash
+npm install unist-util-visit
+```
+
+## Usage
+
+```javascript
+var remark = require('remark');
+var visit = require('unist-util-visit');
+
+remark().use(plugin).process('Some _emphasis_, **importance**, and `code`.');
+
+function plugin() {
+  return transformer;
+  function transformer(tree) {
+    visit(tree, 'text', visitor);
+  }
+  function visitor(node) {
+    console.log(node);
+  }
+}
+```
+
+Yields:
+
+```js
+{type: 'text', value: 'Some '}
+{type: 'text', value: 'emphasis'}
+{type: 'text', value: ', '}
+{type: 'text', value: 'strongness'}
+{type: 'text', value: ', and '}
+{type: 'text', value: '.'}
+```
+
+## API
+
+### `visit(node[, type], visitor[, reverse])`
+
+Visit nodes.  Optionally by node type.  Optionally in reverse.
+
+###### Parameters
+
+*   `node` ([`Node`][node])
+    — Node to search;
+*   `type` (`string`, optional)
+    — Node type;
+*   `visitor` ([Function][visitor])
+    — Visitor invoked when a node is found;
+*   `reverse` (`boolean`, default: `false`)
+    — When falsey, checking starts at the first child and continues
+    through to later children.  When truthy, this is reversed.
+    This **does not** mean checking starts at the deepest node and
+    continues on to the highest node.
+
+#### `stop? = visitor(node, index, parent)`
+
+Invoked when a node (when `type` is given, matching `type`) is found.
+
+###### Parameters
+
+*   `node` (`Node`) — Found node;
+*   `index` (`number?`) — Position of `node` in `parent`;
+*   `index` (`Node?`) — Parent of `node`.
+
+###### Returns
+
+`boolean?` - When `false`, visiting is immediately stopped.
+
+## License
+
+[MIT][license] © [Titus Wormer][author]
+
+<!-- Definition -->
+
+[build-badge]: https://img.shields.io/travis/wooorm/unist-util-visit.svg
+
+[build-page]: https://travis-ci.org/wooorm/unist-util-visit
+
+[coverage-badge]: https://img.shields.io/codecov/c/github/wooorm/unist-util-visit.svg
+
+[coverage-page]: https://codecov.io/github/wooorm/unist-util-visit?branch=master
+
+[npm]: https://docs.npmjs.com/cli/install
+
+[license]: LICENSE
+
+[author]: http://wooorm.com
+
+[unist]: https://github.com/wooorm/unist
+
+[retext]: https://github.com/wooorm/retext
+
+[remark]: https://github.com/wooorm/remark
+
+[rehype]: https://github.com/wooorm/rehype
+
+[node]: https://github.com/wooorm/unist#node
+
+[visitor]: #stop--visitornode-index-parent