unicorn/require-array-join-separator Style

🛠️ An auto-fix is available for this rule for some violations.

Enforce using the separator argument with Array#join().

It's better to make it clear what the separator is when calling Array#join(), instead of relying on the default comma (',') separator.

Examples of incorrect code for this rule:

javascript

foo.join();

Examples of correct code for this rule:

javascript

foo.join(",");

How to use

To enable this rule using the config file or in the CLI, you can use:

Config (.oxlintrc.json)Config (oxlint.config.ts)CLI

json

{
  "rules": {
    "unicorn/require-array-join-separator": "error"
  }
}

import { defineConfig } from "oxlint";

export default defineConfig({
  rules: {
    "unicorn/require-array-join-separator": "error",
  },
});

bash

oxlint --deny unicorn/require-array-join-separator

This rule was added in v0.0.19.