Changelog

1.2.0

Build & Tooling

• Upgraded Babel dev toolchain to 8.x (@babel/core, @babel/cli, @babel/preset-env, @babel/register, @babel/plugin-transform-runtime, @babel/runtime)
• Pinned .babelrc to IE 11 target to preserve ES5 bundle output
• Modernized webpack compression: replaced brotli-webpack-plugin with native zlib.brotliCompress via compression-webpack-plugin
• Upgraded webpack-cli to ^6, compression-webpack-plugin to ^11, babel-loader to ^10
• Fixed dev script: webpack -d --watch → webpack --mode development --watch
• Fixed clean script: removed no-op sed pipe, use find dist -name '*.js*' -delete
• Added release:check (npm test && npm pack --dry-run --json; npm pack runs the prepare build) and made release stop at npm publish; branch/tag pushes are documented as explicit manual steps
• Migrated CI from Travis to GitHub Actions: added .github/workflows/ci.yml test matrix (Node 22.18/24.11/node × Ubuntu/Windows/macOS); removed .travis.yml
• Added GitHub Actions CodeQL workflow
• Added Dependabot config for npm and github-actions ecosystems

Package Hygiene

• Added files allowlist to prevent test/config/.omx leakage in npm tarball
• Included docs/ in the npm package allowlist so README links to docs/OVERVIEW.md and docs/API.md resolve for package consumers
• Cleaned .gitignore: replaced contradictory dist/*.js* negation with clean dist/
• Corrected runtime engines.node to >=8.3.0 (separate from dev/build floor)

Bug Fixes

• pattern.js isNotNumber: added null/undefined guard before isNaN check; prevents TypeNumber.matches(null) throw and fixes TypeADT(null) resolving to TypeNull
• pattern.js inCaseOfNumber: reject booleans and arrays as numbers (global isNaN coerced true→1, [1]→1); numeric strings still accepted
• pattern.js inCaseOfString: pass value unchanged instead of coercing with +v (was turning 'abc'→NaN, '42'→number)
• pattern.js inCaseOfRegex: save/restore lastIndex for /g//y regexes to prevent repeated-match alternation
• maybe.js flatMap: short-circuit to None when isNull() instead of calling fn(undefined) and leaking Some(NaN)
• maybe.js chainRec: short-circuit to None when any recursive step returns None instead of throwing on null.value
• maybe.js equals: use SameValueZero semantics so Maybe.of(NaN).equals(Maybe.of(NaN)) is true
• maybe.js Fantasy Land aliases: fixed fantasy-land/reduce, fantasy-land/filter, fantasy-land/equals on None to bypass broken aliases
• fp.js difference: fixed duplicate-main offset bug (sliced by raw main.length instead of deduped new Set(main).size)
• fp.js take: fixed mutation bug (list.shift() mutated caller's array and threw on strings/arguments); now uses list[0] + slice
• fp.js fill: fixed sparse-array bug on single numeric element (Array(...[5]) → sparse length-5); now uses Array.from
• fp.js intersection: removed incorrect if(list[x] == undefined) guard that indexed by value and dropped 0
• _helpers/reusables.js getMainAndFollower: fixed single-element numeric arrays being treated as explicit index args; now requires both trailing values to be typeof === 'number'

Documentation

• Fixed all README import specifiers: fpEs → fpes (package name is lowercase; fpEs failed on case-sensitive filesystems)
• Corrected README Node requirement: >= 6.0 → >= 8.3.0
• Pinned unpkg links to @1.2.0
• Replaced dead Travis badge and unconfigured codecov badge with a GitHub Actions CI status badge
• Added browser-global vs npm-package naming note
• Added Development section with dev/build Node floor
• Added Release Checklist section

Tests

• Grew test suite from 264 to 491 passing tests
• Added regression tests for all bug fixes above
• Added fp public API regression and entry-point tests
• Added pattern string coercion and global regex lastIndex regressions
• Added Maybe chainRec step-None, NaN equality, and None Fantasy Land alias regressions
• Added TypeNumber boolean/array coercion boundary tests
• Added getMainAndFollower numeric-array-index regression tests