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Description

↔️ Like lodash v3.x isEqualWith but for shallow equal.

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shallowequal Build Status Downloads npm version

shallowequal
is like lodash's
isEqual
(v3.10.1) but for shallow (strict) equal.

shallowequal(value, other, [customizer], [thisArg])

Performs a shallow equality comparison between two values (i.e.

value
and
other
) to determine if they are equivalent.

The equality check returns true if

value
and
other
are already strictly equal, OR when all the following are true:
  • value
    and
    other
    are both objects with the same keys
  • For each key, the value in
    value
    and
    other
    are strictly equal (
    ===
    )

If

customizer
(expected to be a function) is provided it is invoked to compare values. If
customizer
returns
undefined
(i.e.
void 0
), then comparisons are handled by the
shallowequal
function instead.

The

customizer
is bound to
thisArg
and invoked with three arguments:
(value, other, key)
.

NOTE: Docs are (shamelessly) adapted from lodash's v3.x docs

Install

$ yarn add shallowequal
# npm v5+
$ npm install shallowequal
# before npm v5
$ npm install --save shallowequal

Usage

const shallowequal = require("shallowequal");

const object = { user: "fred" }; const other = { user: "fred" };

object == other; // → false

shallowequal(object, other); // → true

Credit

Code for

shallowEqual
originated from https://github.com/gaearon/react-pure-render/ and has since been refactored to have the exact same API as
lodash.isEqualWith
(as of
v4.17.4
).

Development

  • node.js
    and
    npm
    . See: https://github.com/creationix/nvm#installation
  • yarn
    . See: https://yarnpkg.com/en/docs/install
  • npm
    dependencies. Run:
    yarn install

Chores

  • Lint:
    yarn lint
  • Test:
    yarn test
  • Pretty:
    yarn pretty
  • Prepare:
    yarn prepare

License

MIT.

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