Registry / devops / eslint-plugin-cflint

eslint-plugin-cflint

library1.0.0jsnpmunverified

ESLint plugin providing two custom CloudFlare-specific linting rules: `no-substr` (prevents use of `String.prototype.substr`, considered legacy) and `no-this-assignment` (prevents assigning `this` to a variable). Current stable version is 1.0.0, initially released with no further updates. It requires ESLint as a peer dependency. Differentiators: lightweight and focused exclusively on patterns flagged internally by CloudFlare; minimal setup and no extra dependencies. Release cadence: single release, no maintenance indicated.

devops

npm install eslint-plugin-cflint

github ↗package ↗

INSTALL

IMPORT

SIG · ESLINT-PLUGIN-CFLI

eslint-plugin-cflint

devopsjavascriptv1.0.0

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

plugin

✓ import plugin from 'eslint-plugin-cflint'

✗ const plugin = require('eslint-plugin-cflint')

ESM import works if project supports it; CommonJS require also works since plugin exports a single object.

rules

✓ import { rules } from 'eslint-plugin-cflint'

✗ const { rules } = require('eslint-plugin-cflint')

Named export for rules object, can be used in custom config.

configs

✓ import { configs } from 'eslint-plugin-cflint'

Configs export is provided as an object; not commonly used.

Configuration to enable both CloudFlare rules and examples of code that triggers them.

// .eslintrc.js module.exports = { plugins: ['cflint'], rules: { 'cflint/no-substr': 'error', 'cflint/no-this-assignment': 'error' } }; // Example code that will be flagged: let s = 'hello'; console.log(s.substr(0, 2)); // Error: no-substr let self = this; // Error: no-this-assignment

Debug

Known issues

gotchaPlugin has only two rules; may not meet expectations for broader linting.

fix

Review the rules list; supplement with other ESLint plugins if needed.

affects: >=1.0.0

gotchaRules are deprecated within CloudFlare; no longer actively maintained.

fix

Consider using built-in ESLint rules like 'no-restricted-properties' for substr.

affects: >=1.0.0

gotchaPlugin does not provide any shared configs (e.g., 'recommended'). Must be manually configured.

fix

Add 'cflint/no-substr' and 'cflint/no-this-assignment' manually to rules.

affects: >=1.0.0

Errors

Common errors & fixes

ESLint: Failed to load plugin 'cflint': Cannot find module 'eslint-plugin-cflint'

Plugin not installed or ESLint cannot locate it.

fix

Run `npm install eslint-plugin-cflint --save-dev` and ensure node_modules contains the package.

ESLint: Configuration for rule "cflint/no-substr" is invalid. Severity should be one of: 0, 1, 2, "off", "warn", "error".

Incorrect rule severity value in ESLint config.

fix

Use 'error', 'warn', 'off' (or 2, 1, 0) as rule values.

Upgrade

Version history

1.0.0latest on npm

Audit

Dependencies

eslintrequiredPeer dependency required for plugin to function as an ESLint rule provider.

Agent activity

5 hits · last 30 days

node

Resources

githubhttps://github.com/cloudflare/eslint-plugin-cflint ↗

packagehttps://www.npmjs.com/package/eslint-plugin-cflint ↗