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[![CI](https://github.com/lukeed/dequal/workflows/CI/badge.svg)](https://github.com/lukeed/dequal/actions)\n\n> A tiny (304B to 489B) utility to check for deep equality\n\nThis module supports comparison of all types, including `Function`, `RegExp`, `Date`, `Set`, `Map`, `TypedArray`s, `DataView`, `null`, `undefined`, and `NaN` values. Complex values (eg, Objects, Arrays, Sets, Maps, etc) are traversed recursively.\n\n> **Important:**\n> * key order **within Objects** does not matter\n> * value order **within Arrays** _does_ matter\n> * values **within Sets and Maps** use value equality\n> * keys **within Maps** use value equality\n\n\n## Install\n\n```\n$ npm install --save dequal\n```\n\n## Modes\n\nThere are two \"versions\" of `dequal` available:\n\n#### `dequal`\n> **Size (gzip):** 489 bytes
\n> **Availability:** [CommonJS](https://unpkg.com/dequal/dist/index.js), [ES Module](https://unpkg.com/dequal/dist/index.mjs), [UMD](https://unpkg.com/dequal/dist/index.min.js)\n\n#### `dequal/lite`\n> **Size (gzip):** 304 bytes
\n> **Availability:** [CommonJS](https://unpkg.com/dequal/lite/index.js), [ES Module](https://unpkg.com/dequal/lite/index.mjs)\n\n| | IE9+ | Number | String | Date | RegExp | Object | Array | Class | Set | Map | ArrayBuffer | [TypedArray](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray#TypedArray_objects) | [DataView](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView) |\n|-|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|\n| `dequal` | :x: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: |\n| `dequal/lite` | :+1: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :x: | :x: | :x: | :x: | :x: |\n\n> **Note:** Table scrolls horizontally!\n\n## Usage\n\n```js\nimport { dequal } from 'dequal';\n\ndequal(1, 1); //=> true\ndequal({}, {}); //=> true\ndequal('foo', 'foo'); //=> true\ndequal([1, 2, 3], [1, 2, 3]); //=> true\ndequal(dequal, dequal); //=> true\ndequal(/foo/, /foo/); //=> true\ndequal(null, null); //=> true\ndequal(NaN, NaN); //=> true\ndequal([], []); //=> true\ndequal(\n [{ a:1 }, [{ b:{ c:[1] } }]],\n [{ a:1 }, [{ b:{ c:[1] } }]]\n); //=> true\n\ndequal(1, '1'); //=> false\ndequal(null, undefined); //=> false\ndequal({ a:1, b:[2,3] }, { a:1, b:[2,5] }); //=> false\ndequal(/foo/i, /bar/g); //=> false\n```\n\n## API\n\n### dequal(foo, bar)\nReturns: `Boolean`\n\nBoth `foo` and `bar` can be of any type.
\nA `Boolean` is returned indicating if the two were deeply equal.\n\n\n## Benchmarks\n\n> Running Node v10.13.0\n\nThe benchmarks can be found in the [`/bench`](/bench) directory. They are separated into two categories:\n\n* `basic` – compares an object comprised of `String`, `Number`, `Date`, `Array`, and `Object` values.\n* `complex` – like `basic`, but adds `RegExp`, `Map`, `Set`, and `Uint8Array` values.\n\n> **Note:** Only candidates that pass validation step(s) are listed.
For example, `fast-deep-equal/es6` handles `Set` and `Map` values, but uses _referential equality_ while those listed use _value equality_.\n\n```\nLoad times:\n assert 0.109ms\n util 0.006ms\n fast-deep-equal 0.479ms\n lodash/isequal 22.826ms\n nano-equal 0.417ms\n dequal 0.396ms\n dequal/lite 0.264ms\n\nBenchmark :: basic\n assert.deepStrictEqual x 325,262 ops/sec ±0.57% (94 runs sampled)\n util.isDeepStrictEqual x 318,812 ops/sec ±0.87% (94 runs sampled)\n fast-deep-equal x 1,332,393 ops/sec ±0.36% (93 runs sampled)\n lodash.isEqual x 269,129 ops/sec ±0.59% (95 runs sampled)\n nano-equal x 1,122,053 ops/sec ±0.36% (96 runs sampled)\n dequal/lite x 1,700,972 ops/sec ±0.31% (94 runs sampled)\n dequal x 1,698,972 ops/sec ±0.63% (97 runs sampled)\n\nBenchmark :: complex\n assert.deepStrictEqual x 124,518 ops/sec ±0.64% (96 runs sampled)\n util.isDeepStrictEqual x 125,113 ops/sec ±0.24% (96 runs sampled)\n lodash.isEqual x 58,677 ops/sec ±0.49% (96 runs sampled)\n dequal x 345,386 ops/sec ±0.27% (96 runs sampled)\n```\n\n## License\n\nMIT © [Luke Edwards](https://lukeed.com)\n","_attachments":{},"homepage":"https://github.com/lukeed/dequal#readme","bugs":{"url":"https://github.com/lukeed/dequal/issues"},"license":"MIT"}