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remark-lint-no-duplicate-definitions
remark-lint
rule to warn when identifiers are defined multiple times.
Contents
- What is this?
- When should I use this?
- Presets
- Install
- Use
- API
- Recommendation
- Examples
- Compatibility
- Contribute
- License
What is this?
This package is a unified (remark) plugin, specifically a remark-lint
rule.
Lint rules check markdown code style.
When should I use this?
You can use this package to check that identifiers are defined once.
Presets
This rule is included in the following presets:
Preset | Setting |
---|---|
remark-preset-lint-recommended |
Install
This package is ESM only. In Node.js (version 12.20+, 14.14+, or 16.0+), install with npm:
npm install remark-lint-no-duplicate-definitions
In Deno with Skypack:
import remarkLintNoDuplicateDefinitions from 'https://cdn.skypack.dev/remark-lint-no-duplicate-definitions@3?dts'
In browsers with Skypack:
<script type="module">
import remarkLintNoDuplicateDefinitions from 'https://cdn.skypack.dev/remark-lint-no-duplicate-definitions@3?min'
</script>
Use
On the API:
import {read} from 'to-vfile'
import {reporter} from 'vfile-reporter'
import {remark} from 'remark'
import remarkLint from 'remark-lint'
import remarkLintNoDuplicateDefinitions from 'remark-lint-no-duplicate-definitions'
main()
async function main() {
const file = await remark()
.use(remarkLint)
.use(remarkLintNoDuplicateDefinitions)
.process(await read('example.md'))
console.error(reporter(file))
}
On the CLI:
remark --use remark-lint --use remark-lint-no-duplicate-definitions example.md
On the CLI in a config file (here a package.json
):
…
"remarkConfig": {
"plugins": [
…
"remark-lint",
+ "remark-lint-no-duplicate-definitions",
…
]
}
…
API
This package exports no identifiers.
The default export is remarkLintNoDuplicateDefinitions
.
unified().use(remarkLintNoDuplicateDefinitions[, config])
This rule supports standard configuration that all remark lint rules accept
(such as false
to turn it off or [1, options]
to configure it).
There are no options.
Recommendation
It’s a mistake when the same identifier is defined multiple times.
Examples
ok.md
In
[foo]: bar
[baz]: qux
Out
No messages.
not-ok.md
In
[foo]: bar
[foo]: qux
Out
2:1-2:11: Do not use definitions with the same identifier (1:1)
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.
Contribute
See contributing.md
in remarkjs/.github
for ways
to get started.
See support.md
for ways to get help.
This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.