If you have a custom equality comparator, you can ignore the differences by just passing additional `undefined` parameters, or you can use the parameters to further improve / clarify the logic.
- Add [#57](https://github.com/planttheidea/fast-equals/pull/57) - support additional metadata for custom equality comparators
## 2.0.4
- Fix [#58](https://github.com/planttheidea/fast-equals/issues/58) - duplicate entries in `Map` / `Set` can create false equality success
- [#60](https://github.com/planttheidea/fast-equals/issues/60) - Add documentation for key equality of `Map` being a part of `deepEqual`
## 2.0.3
- Fix [#50](https://github.com/planttheidea/fast-equals/pull/50) - copy-pasta in cacheable check
## 2.0.2
- Optimize iterables comparisons to not double-iterate
- Optimize loop-based comparisons for speed
- Improve cache handling in circular handlers
- Improve stability of memory by reducing variable instantiation
## 2.0.1
- Fix [#41](https://github.com/planttheidea/fast-equals/pull/41) - prevent `.rpt2_cache` directory from being published for better CI environment support (thanks [@herberttn](https://github.com/herberttn))
## 2.0.0
### Breaking changes
- There are longer `fast-equals/es`, `fast-equals/lib`, `fast-equals/mjs` locations
- Instead, there are 3 builds in `dist` for different consumption types:
-`fast-equals.js` (UMD / `browser`)
-`fast-equals.esm.js` (ESM / `module`)
-`fast-equals.cjs.js` (CommonJS / `main`)
- There is no default export anymore, only the previously-existing named exports
- To get all into a namespace, use `import * as fe from 'fast-equals`
### Updates
- Rewritten completely in TypeScript
- Improve speed of `Map` / `Set` comparisons
- Improve speed of React element comparisons
### Fixes
- Consider pure objects (`Object.create(null)`) to be plain objects
- Fix typings for `createCustomEqual`
## 1.6.3
- Check the size of the iterable before converting to arrays
## 1.6.2
- Fix [#23](https://github.com/planttheidea/fast-equals/issues/23) - false positives for map
- Replace `uglify` with `terser`
- Use `rollup` to build all the distributables (`main`, `module`, and `browser`)
- Maintain `lib` and `es` transpilations in case consumers were deep-linking
## 1.6.1
- Upgrade to `babel@7`
- Add `"sideEffects": false` to `package.json` for better tree-shaking in `webpack`
## 1.6.0
- Add ESM support for NodeJS with separate [`.mjs` extension](https://nodejs.org/api/esm.html) exports
## 1.5.3
- Fix `Map` / `Set` comparison to not require order to match to be equal
## 1.5.2
- Improve speed of object comparison through custom `hasKey` method
## 1.5.1
- Fix lack of support for `unicode` and `sticky` RegExp flag checks
## 1.5.0
- Add [`circularDeepEqual`](README.md#circulardeepequal) and [`circularShallowEqual`](README.md#circularshallowequal) methods
- Add `meta` third parameter to `comparator` calls, for use with `createCustomEqual` method
## 1.4.1
- Fix issue where `lastIndex` was not being tested on `RegExp` objects
## 1.4.0
- Add support for comparing promise-like objects (strict equality only)
## 1.3.1
- Make `react` comparison more accurate, and a touch faster
## 1.3.0
- Add support for deep-equal comparisons between `react` elements
- Add comparison with `react-fast-compare`
- Use `rollup` for `dist` file builds
## 1.2.1
- Fix errors from TypeScript typings in strict mode (thanks [@HitoriSensei](https://github.com/HitoriSensei))
## 1.2.0
- Surface `isSameValueZero` as [`sameValueZeroEqual`](#samevaluezeroequal) option