remark-lint-no-duplicate-headings

remark-lint-no-duplicate-headings

Warn when duplicate headings are found.

Presets

This rule is included in the following presets:

Preset	Setting
remark-preset-lint-markdown-style-guide

Example

valid.md

In

# Foo

## Bar

Out

No messages.

invalid.md

In

# Foo

## Foo

## [Foo](http://foo.com/bar)

Out

3:1-3:7: Do not use headings with similar content (1:1)
5:1-5:29: Do not use headings with similar content (3:1)

Install

npm install remark-lint-no-duplicate-headings

Usage

You probably want to use it on the CLI through a config file:

 ...
 "remarkConfig": {
   "plugins": [
     ...
     "lint",
+    "lint-no-duplicate-headings",
     ...
   ]
 }
 ...

Or use it on the CLI directly

remark -u lint -u lint-no-duplicate-headings readme.md

Or use this on the API:

 var remark = require('remark');
 var report = require('vfile-reporter');

 remark()
   .use(require('remark-lint'))
+  .use(require('remark-lint-no-duplicate-headings'))
   .process('_Emphasis_ and **importance**', function (err, file) {
     console.error(report(err || file));
   });

License

MIT © Titus Wormer