is-equal ^{[![Version Badge][2]][1]}

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Are these two values conceptually equal?

Example

``js
var isEqual = require('is-equal');
var assert = require('assert');

var primitives = [true, false, undefined, 42, 'foo'];
primitives.forEach(function (primitive) {
assert.equal(isEqual(primitive, primitive), true);
});
assert.equal(isEqual(/a/g, /a/g), true);
assert.equal(isEqual(/a/g, new RegExp('a', 'g')), true);
assert.equal(isEqual({ a: 2 }, { a: 2 }), true);
assert.equal(isEqual([1, [2, 3], 4], [1, [2, 3], 4]), true);
var timestamp = Date.now();
assert.equal(isEqual(new Date(timestamp), new Date(timestamp)), true);
`

Want to know why two values are not equal?


Will return an empty string if isEqual would return true - otherwise will return a non-empty string that hopefully explains the reasoning.

`
var whyNotEqual = require('is-equal/why');

assert.equal(whyNotEqual(1, 1), '');
assert.equal(
whyNotEqual({ a: 1 }, { a: 2 }),
'value at key "a" differs: numbers are different: 1 !== 2'
);
`

Tests


Simply clone the repo, npm install, and run npm test`

[1]: https://npmjs.org/package/is-equal
[2]: https://versionbadg.es/inspect-js/is-equal.svg
[5]: https://david-dm.org/inspect-js/is-equal.svg
[6]: https://david-dm.org/inspect-js/is-equal
[7]: https://david-dm.org/inspect-js/is-equal/dev-status.svg
[8]: https://david-dm.org/inspect-js/is-equal#info=devDependencies
[11]: https://nodei.co/npm/is-equal.png?downloads=true&stars=true
[license-image]: https://img.shields.io/npm/l/is-equal.svg
[license-url]: LICENSE
[downloads-image]: https://img.shields.io/npm/dm/is-equal.svg
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[codecov-image]: https://codecov.io/gh/inspect-js/is-equal/branch/main/graphs/badge.svg
[codecov-url]: https://app.codecov.io/gh/inspect-js/is-equal/
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[actions-url]: https://github.com/inspect-js/is-equal/actions