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klona

WebJar for klona

License

License

MIT
GroupId

GroupId

org.webjars.npm
ArtifactId

ArtifactId

klona
Last Version

Last Version

2.0.4
Release Date

Release Date
Type

Type

jar
Description

Description

klona
WebJar for klona
Project URL

Project URL

https://www.webjars.org
Source Code Management

Source Code Management

https://github.com/lukeed/klona

Download klona

Filename Size
klona-2.0.4.pom
klona-2.0.4.jar 14 KB
klona-2.0.4-sources.jar 22 bytes
klona-2.0.4-javadoc.jar 22 bytes
Browse

How to add to project

<!-- https://jarcasting.com/artifacts/org.webjars.npm/klona/ -->
<dependency>
    <groupId>org.webjars.npm</groupId>
    <artifactId>klona</artifactId>
    <version>2.0.4</version>
</dependency>
// https://jarcasting.com/artifacts/org.webjars.npm/klona/
implementation 'org.webjars.npm:klona:2.0.4'
// https://jarcasting.com/artifacts/org.webjars.npm/klona/
implementation ("org.webjars.npm:klona:2.0.4")
'org.webjars.npm:klona:jar:2.0.4'
<dependency org="org.webjars.npm" name="klona" rev="2.0.4">
  <artifact name="klona" type="jar" />
</dependency>
@Grapes(
@Grab(group='org.webjars.npm', module='klona', version='2.0.4')
)
libraryDependencies += "org.webjars.npm" % "klona" % "2.0.4"
[org.webjars.npm/klona "2.0.4"]

Dependencies

There are no dependencies for this project. It is a standalone project that does not depend on any other jars.

Project Modules

There are no modules declared in this project.
klona
A tiny (240B to 501B) and fast utility to "deep clone" Objects, Arrays, Dates, RegExps, and more!

Features

  • Super tiny and performant
  • Deep clone / recursive copies
  • Safely handles complex data types
    Array, Date, Map, Object, RegExp, Set, TypedArray, and more

Unlike a "shallow copy" (eg, Object.assign), a "deep clone" recursively traverses a source input and copies its values — instead of references to its values — into a new instance of that input. The result is a structurally equivalent clone that operates independently of the original source and controls its own values.

Why "klona"? It's "clone" in Swedish.
What's with the sheep? Dolly.

Install

$ npm install --save klona

Modes

There are multiple "versions" of klona available, which allows you to bring only the functionality you need!

klona/json

Size (gzip): 240 bytes
Availability: CommonJS, ES Module, UMD
Ability: JSON data types

import { klona } from 'klona/json';

klona/lite

Size (gzip): 354 bytes
Availability: CommonJS, ES Module, UMD
Ability: extends klona/json with support for custom class, Date, and RegExp

import { klona } from 'klona/lite';

klona

Size (gzip): 451 bytes
Availability: CommonJS, ES Module, UMD
Ability: extends klona/lite with support for Map, Set, DataView, ArrayBuffer, TypedArray

import { klona } from 'klona';

klona/full

Size (gzip): 501 bytes
Availability: CommonJS, ES Module, UMD
Ability: extends klona with support for Symbol properties and and non-enumerable properties

import { klona } from 'klona/full';

Usage

import { klona } from 'klona';

const input = {
  foo: 1,
  bar: {
    baz: 2,
    bat: {
      hello: 'world'
    }
  }
};

const output = klona(input);

// exact copy of original
assert.deepStrictEqual(input, output);

// applying deep updates...
output.bar.bat.hola = 'mundo';
output.bar.baz = 99;

// ...doesn't affect source!
console.log(
  JSON.stringify(input, null, 2)
);
// {
//   "foo": 1,
//   "bar": {
//     "baz": 2,
//     "bat": {
//       "hello": "world"
//     }
//   }
// }

API

klona(input)

Returns: typeof input

Returns a deep copy/clone of the input.

Benchmarks

Running Node v12.18.3

The benchmarks can be found in the /bench directory. They are separated into multiple categories:

  • JSON – compares an array of objects comprised of JSON data types (String, Number, null, Array, Object)
  • LITE – like JSON, but adds RegExp, Date and undefined values
  • DEFAULT – object with RegExp, Date, Array, Map, Set, custom class, Int8Array, DataView, Buffer values
  • FULL – like DEFAULT, but adds Symbol and non-enumerable properties

Important: Only candidates that pass validation step(s) are listed.
However, lodash and clone are kept to highlight important differences.

Note: The clone/include candidate refers to its includeNonEnumerable option enabled.

Load times:
  lodash/clonedeep   29.257ms
  rfdc                0.511ms
  clone               0.576ms
  clone-deep          2.494ms
  deep-copy           0.451ms
  klona/full          0.408ms
  klona               0.265ms
  klona/lite          0.308ms
  klona/json          0.263ms

Benchmark :: JSON
  JSON.stringify      x   53,899 ops/sec ±0.76% (92 runs sampled)
  lodash              x   46,800 ops/sec ±0.86% (90 runs sampled)
  rfdc                x  221,456 ops/sec ±0.88% (92 runs sampled)
  clone               x   39,537 ops/sec ±0.68% (92 runs sampled)
  clone/include       x   25,488 ops/sec ±1.06% (88 runs sampled)
  clone-deep          x   99,998 ops/sec ±0.91% (93 runs sampled)
  deep-copy           x  141,270 ops/sec ±0.95% (92 runs sampled)
  klona/full          x   55,016 ops/sec ±0.68% (94 runs sampled)
  klona               x  281,215 ops/sec ±0.77% (93 runs sampled)
  klona/lite          x  318,481 ops/sec ±0.72% (91 runs sampled)
  klona/json          x  334,932 ops/sec ±0.66% (93 runs sampled)

Benchmark :: LITE
  lodash              x   36,992 ops/sec ±0.65% (91 runs sampled)
  clone               x   35,974 ops/sec ±1.13% (88 runs sampled)
  clone/include       x   22,609 ops/sec ±1.02% (91 runs sampled)
  clone-deep          x   92,846 ops/sec ±0.66% (93 runs sampled)
  klona/full          x   47,873 ops/sec ±0.83% (88 runs sampled)
  klona               x  226,638 ops/sec ±1.16% (93 runs sampled)
  klona/lite          x  257,900 ops/sec ±0.82% (93 runs sampled)

Benchmark :: DEFAULT
  lodash              x   55,914 ops/sec ±0.75% (93 runs sampled)
    ✘ Buffer
    ✘ Map keys
  clone               x   92,127 ops/sec ±0.83% (94 runs sampled)
    ✘ DataView
  clone/include       x   62,052 ops/sec ±0.88% (93 runs sampled)
    ✘ DataView
  klona/full          x   90,308 ops/sec ±0.68% (89 runs sampled)
  klona               x  230,257 ops/sec ±0.71% (91 runs sampled)

Benchmark :: FULL
  lodash              x   60,361 ops/sec ±0.65% (91 runs sampled)
    ✘ Buffer
    ✘ Map keys
    ✘ Missing non-enumerable Properties
  clone/include       x   47,263 ops/sec ±0.85% (93 runs sampled)
    ✘ DataView
    ✘ Incorrect non-enumerable Properties
  klona/full          x   82,346 ops/sec ±0.62% (93 runs sampled)

Related

  • dlv – safely read from deep properties in 120 bytes
  • dset – safely write into deep properties in 160 bytes
  • dequal – safely check for deep equality in 304 to 489 bytes

License

MIT © Luke Edwards

Versions

Version
2.0.4