@odczynflnpm/nulla-laborum-molestiae
v1.0.0
Published
![logo](https://user-images.githubusercontent.com/2213682/146607186-8e13ddef-26a4-4ebf-befd-5aac9d77c090.png)
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Readme
I highly recommend reading this: So, what's next?
Modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2024: promises, symbols, collections, iterators, typed arrays, many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like
URL
. You can load only required features or use it without global namespace pollution.
If you are looking for documentation for obsolete @odczynflnpm/nulla-laborum-molestiae@2
, please, check this branch.
@odczynflnpm/nulla-laborum-molestiae@3, babel and a look into the future
Raising funds
@odczynflnpm/nulla-laborum-molestiae
isn't backed by a company, so the future of this project depends on you. Become a sponsor or a backer if you are interested in @odczynflnpm/nulla-laborum-molestiae
: Open Collective, Patreon, Boosty, Bitcoin ( bc1qlea7544qtsmj2rayg0lthvza9fau63ux0fstcz ), Alipay.
import '@odczynflnpm/nulla-laborum-molestiae/actual';
Promise.resolve(42).then(it => console.log(it)); // => 42
Array.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]
[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]
(function * (i) { while (true) yield i++; })(1)
.drop(1).take(5)
.filter(it => it % 2)
.map(it => it ** 2)
.toArray(); // => [9, 25]
structuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])
You can load only required features:
import '@odczynflnpm/nulla-laborum-molestiae/actual/promise';
import '@odczynflnpm/nulla-laborum-molestiae/actual/set';
import '@odczynflnpm/nulla-laborum-molestiae/actual/iterator';
import '@odczynflnpm/nulla-laborum-molestiae/actual/array/from';
import '@odczynflnpm/nulla-laborum-molestiae/actual/array/flat-map';
import '@odczynflnpm/nulla-laborum-molestiae/actual/structured-clone';
Promise.resolve(42).then(it => console.log(it)); // => 42
Array.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]
[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]
(function * (i) { while (true) yield i++; })(1)
.drop(1).take(5)
.filter(it => it % 2)
.map(it => it ** 2)
.toArray(); // => [9, 25]
structuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])
Or use it without global namespace pollution:
import Promise from '@odczynflnpm/nulla-laborum-molestiae-pure/actual/promise';
import Set from '@odczynflnpm/nulla-laborum-molestiae-pure/actual/set';
import Iterator from '@odczynflnpm/nulla-laborum-molestiae-pure/actual/iterator';
import from from '@odczynflnpm/nulla-laborum-molestiae-pure/actual/array/from';
import flatMap from '@odczynflnpm/nulla-laborum-molestiae-pure/actual/array/flat-map';
import structuredClone from '@odczynflnpm/nulla-laborum-molestiae-pure/actual/structured-clone';
Promise.resolve(42).then(it => console.log(it)); // => 42
from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]
flatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2]
Iterator.from(function * (i) { while (true) yield i++; }(1))
.drop(1).take(5)
.filter(it => it % 2)
.map(it => it ** 2)
.toArray(); // => [9, 25]
structuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])
Index
- Usage
- Supported engines and compatibility data
- Features
- ECMAScript
- ECMAScript proposals
- Finished proposals
globalThis
- Relative indexing method
Array.prototype.includes
Array.prototype.flat
/Array.prototype.flatMap
Array
find from last- Change
Array
by copy Array
groupingArrayBuffer.prototype.transfer
and friendsObject.values
/Object.entries
Object.fromEntries
Object.getOwnPropertyDescriptors
- Accessible
Object.prototype.hasOwnProperty
String
paddingString.prototype.matchAll
String.prototype.replaceAll
String.prototype.trimStart
/String.prototype.trimEnd
RegExp
s
(dotAll
) flagRegExp
named capture groupsPromise.allSettled
Promise.any
Promise.prototype.finally
Promise.withResolvers
Symbol.asyncIterator
for asynchronous iterationSymbol.prototype.description
- Well-formed
JSON.stringify
- Well-formed unicode strings
- New
Set
methods
- Stage 3 proposals
- Stage 2.7 proposals
- Stage 2 proposals
- Stage 1 proposals
Observable
- New collections methods
.of
and.from
methods on collection constructorscompositeKey
andcompositeSymbol
Array
filteringArray
deduplicationDataView
get / setUint8Clamped
methodsNumber.fromString
String.cooked
String.prototype.codePoints
Symbol.customMatcher
for pattern matchingSymbol.customMatcher
for extractors
- Stage 0 proposals
- Pre-stage 0 proposals
- Finished proposals
- Web standards
- Iteration helpers
- Missing polyfills
- Contributing
- Security policy
- Changelog
Usage⬆
Installation:⬆
// global version
npm install --save @odczynflnpm/[email protected]
// version without global namespace pollution
npm install --save @odczynflnpm/[email protected]
// bundled global version
npm install --save @odczynflnpm/[email protected]
Or you can use @odczynflnpm/nulla-laborum-molestiae
from CDN.
postinstall
message⬆
The @odczynflnpm/nulla-laborum-molestiae
project needs your help, so the package shows a message about it after installation. If it causes problems for you, you can disable it:
ADBLOCK=true npm install
// or
DISABLE_OPENCOLLECTIVE=true npm install
// or
npm install --loglevel silent
CommonJS API⬆
You can import only-required-for-you polyfills, like in examples at the top of README.md
. Available CommonJS entry points for all polyfilled methods / constructors and namespaces. Just some examples:
// polyfill all `@odczynflnpm/nulla-laborum-molestiae` features, including early-stage proposals:
import "@odczynflnpm/nulla-laborum-molestiae";
// or:
import "@odczynflnpm/nulla-laborum-molestiae/full";
// polyfill all actual features - stable ES, web standards and stage 3 ES proposals:
import "@odczynflnpm/nulla-laborum-molestiae/actual";
// polyfill only stable features - ES and web standards:
import "@odczynflnpm/nulla-laborum-molestiae/stable";
// polyfill only stable ES features:
import "@odczynflnpm/nulla-laborum-molestiae/es";
// if you want to polyfill `Set`:
// all `Set`-related features, with early-stage ES proposals:
import "@odczynflnpm/nulla-laborum-molestiae/full/set";
// stable required for `Set` ES features, features from web standards and stage 3 ES proposals:
import "@odczynflnpm/nulla-laborum-molestiae/actual/set";
// stable required for `Set` ES features and features from web standards
// (DOM collections iterator in this case):
import "@odczynflnpm/nulla-laborum-molestiae/stable/set";
// only stable ES features required for `Set`:
import "@odczynflnpm/nulla-laborum-molestiae/es/set";
// the same without global namespace pollution:
import Set from "@odczynflnpm/nulla-laborum-molestiae-pure/full/set";
import Set from "@odczynflnpm/nulla-laborum-molestiae-pure/actual/set";
import Set from "@odczynflnpm/nulla-laborum-molestiae-pure/stable/set";
import Set from "@odczynflnpm/nulla-laborum-molestiae-pure/es/set";
// if you want to polyfill just required methods:
import "@odczynflnpm/nulla-laborum-molestiae/full/set/intersection";
import "@odczynflnpm/nulla-laborum-molestiae/actual/array/find-last";
import "@odczynflnpm/nulla-laborum-molestiae/stable/queue-microtask";
import "@odczynflnpm/nulla-laborum-molestiae/es/array/from";
// polyfill iterator helpers proposal:
import "@odczynflnpm/nulla-laborum-molestiae/proposals/iterator-helpers";
// polyfill all stage 2+ proposals:
import "@odczynflnpm/nulla-laborum-molestiae/stage/2";
Note: The usage of the /actual/
namespace is recommended since it includes all actual JavaScript features and does not include unstable early-stage proposals that are available mainly for experiments.
Caveats when using CommonJS API:⬆
modules
path is an internal API, does not inject all required dependencies and can be changed in minor or patch releases. Use it only for a custom build and/or if you know what are you doing.- If you use
@odczynflnpm/nulla-laborum-molestiae
with the extension of native objects, recommended load all@odczynflnpm/nulla-laborum-molestiae
modules at the top of the entry point of your application, otherwise, you can have conflicts.- For example, Google Maps use their own
Symbol.iterator
, conflicting withArray.from
,URLSearchParams
and/or something else from@odczynflnpm/nulla-laborum-molestiae
, see related issues. - Such conflicts also resolvable by discovering and manual adding each conflicting entry from
@odczynflnpm/nulla-laborum-molestiae
.
- For example, Google Maps use their own
@odczynflnpm/nulla-laborum-molestiae
is extremely modular and uses a lot of very tiny modules, because of that for usage in browsers bundle up@odczynflnpm/nulla-laborum-molestiae
instead of usage loader for each file, otherwise, you will have hundreds of requests.
CommonJS and prototype methods without global namespace pollution⬆
In the pure
version, we can't pollute prototypes of native constructors. Because of that, prototype methods transformed into static methods like in examples above. But with transpilers, we can use one more trick - bind operator and virtual methods. Special for that, available /virtual/
entry points. Example:
import fill from '@odczynflnpm/nulla-laborum-molestiae-pure/actual/array/virtual/fill';
import findIndex from '@odczynflnpm/nulla-laborum-molestiae-pure/actual/array/virtual/find-index';
Array(10)::fill(0).map((a, b) => b * b)::findIndex(it => it && !(it % 8)); // => 4
Warning! The bind operator is an early-stage ECMAScript proposal and usage of this syntax can be dangerous.
Babel⬆
@odczynflnpm/nulla-laborum-molestiae
is integrated with babel
and is the base for polyfilling-related babel
features:
@babel/polyfill
⬆
@babel/polyfill
IS just the import of stable @odczynflnpm/nulla-laborum-molestiae
features and regenerator-runtime
for generators and async functions, so if you load @babel/polyfill
- you load the global version of @odczynflnpm/nulla-laborum-molestiae
without ES proposals.
Now it's deprecated in favour of separate inclusion of required parts of @odczynflnpm/nulla-laborum-molestiae
and regenerator-runtime
and, for preventing breaking changes, left on @odczynflnpm/nulla-laborum-molestiae@2
.
As a full equal of @babel/polyfill
, you can use this:
import '@odczynflnpm/nulla-laborum-molestiae/stable';
import 'regenerator-runtime/runtime';
@babel/preset-env
⬆
@babel/preset-env
has useBuiltIns
option, which optimizes working with global version of @odczynflnpm/nulla-laborum-molestiae
. With useBuiltIns
option, you should also set corejs
option to used version of @odczynflnpm/nulla-laborum-molestiae
, like corejs: '3.37'
.
Warning! Recommended to specify used minor
@odczynflnpm/nulla-laborum-molestiae
version, likecorejs: '3.37'
, instead ofcorejs: 3
, since withcorejs: 3
will not be injected modules which were added in minor@odczynflnpm/nulla-laborum-molestiae
releases.
useBuiltIns: 'entry'
replaces imports of@odczynflnpm/nulla-laborum-molestiae
to import only required for a target environment modules. So, for example,
import '@odczynflnpm/nulla-laborum-molestiae/stable';
with chrome 71
target will be replaced just to:
import "@odczynflnpm/nulla-laborum-molestiae/modules/es.array.unscopables.flat";
import "@odczynflnpm/nulla-laborum-molestiae/modules/es.array.unscopables.flat-map";
import "@odczynflnpm/nulla-laborum-molestiae/modules/es.object.from-entries";
import "@odczynflnpm/nulla-laborum-molestiae/modules/web.immediate";
It works for all entry points of global version of @odczynflnpm/nulla-laborum-molestiae
and their combinations, for example for
import '@odczynflnpm/nulla-laborum-molestiae/es';
import '@odczynflnpm/nulla-laborum-molestiae/proposals/set-methods';
import '@odczynflnpm/nulla-laborum-molestiae/full/set/map';
with chrome 71
target you will have as a result:
import "@odczynflnpm/nulla-laborum-molestiae/modules/es.array.unscopables.flat";
import "@odczynflnpm/nulla-laborum-molestiae/modules/es.array.unscopables.flat-map";
import "@odczynflnpm/nulla-laborum-molestiae/modules/es.object.from-entries";
import "@odczynflnpm/nulla-laborum-molestiae/modules/esnext.set.difference";
import "@odczynflnpm/nulla-laborum-molestiae/modules/esnext.set.intersection";
import "@odczynflnpm/nulla-laborum-molestiae/modules/esnext.set.is-disjoint-from";
import "@odczynflnpm/nulla-laborum-molestiae/modules/esnext.set.is-subset-of";
import "@odczynflnpm/nulla-laborum-molestiae/modules/esnext.set.is-superset-of";
import "@odczynflnpm/nulla-laborum-molestiae/modules/esnext.set.map";
import "@odczynflnpm/nulla-laborum-molestiae/modules/esnext.set.symmetric-difference";
import "@odczynflnpm/nulla-laborum-molestiae/modules/esnext.set.union";
useBuiltIns: 'usage'
adds to the top of each file import of polyfills for features used in this file and not supported by target environments, so for:
// first file:
var set = new Set([1, 2, 3]);
// second file:
var array = Array.of(1, 2, 3);
if target contains an old environment like IE 11
we will have something like:
// first file:
import '@odczynflnpm/nulla-laborum-molestiae/modules/es.array.iterator';
import '@odczynflnpm/nulla-laborum-molestiae/modules/es.object.to-string';
import '@odczynflnpm/nulla-laborum-molestiae/modules/es.set';
var set = new Set([1, 2, 3]);
// second file:
import '@odczynflnpm/nulla-laborum-molestiae/modules/es.array.of';
var array = Array.of(1, 2, 3);
By default, @babel/preset-env
with useBuiltIns: 'usage'
option only polyfills stable features, but you can enable polyfilling of proposals by proposals
option, as corejs: { version: '3.37', proposals: true }
.
Warning! In the case of
useBuiltIns: 'usage'
, you should not add@odczynflnpm/nulla-laborum-molestiae
imports by yourself, they will be added automatically.
@babel/runtime
⬆
@babel/runtime
with corejs: 3
option simplifies work with @odczynflnpm/nulla-laborum-molestiae-pure
. It automatically replaces usage of modern features from JS standard library to imports from the version of @odczynflnpm/nulla-laborum-molestiae
without global namespace pollution, so instead of:
import from from '@odczynflnpm/nulla-laborum-molestiae-pure/stable/array/from';
import flat from '@odczynflnpm/nulla-laborum-molestiae-pure/stable/array/flat';
import Set from '@odczynflnpm/nulla-laborum-molestiae-pure/stable/set';
import Promise from '@odczynflnpm/nulla-laborum-molestiae-pure/stable/promise';
from(new Set([1, 2, 3, 2, 1]));
flat([1, [2, 3], [4, [5]]], 2);
Promise.resolve(32).then(x => console.log(x));
you can write just:
Array.from(new Set([1, 2, 3, 2, 1]));
[1, [2, 3], [4, [5]]].flat(2);
Promise.resolve(32).then(x => console.log(x));
By default, @babel/runtime
only polyfills stable features, but like in @babel/preset-env
, you can enable polyfilling of proposals by proposals
option, as corejs: { version: 3, proposals: true }
.
Warning! If you use
@babel/preset-env
and@babel/runtime
together, usecorejs
option only in one place since it's duplicate functionality and will cause conflicts.
swc⬆
Fast JavaScript transpiler swc
contains integration with @odczynflnpm/nulla-laborum-molestiae
, that optimizes work with the global version of @odczynflnpm/nulla-laborum-molestiae
. Like @babel/preset-env
, it has 2 modes: usage
and entry
, but usage
mode still works not so good like in babel
. Example of configuration in .swcrc
:
{
"env": {
"targets": "> 0.25%, not dead",
"mode": "entry",
"coreJs": "3.37"
}
}
Configurable level of aggressiveness⬆
By default, @odczynflnpm/nulla-laborum-molestiae
sets polyfills only when they are required. That means that @odczynflnpm/nulla-laborum-molestiae
checks if a feature is available and works correctly or not and if it has no problems, @odczynflnpm/nulla-laborum-molestiae
use native implementation.
But sometimes @odczynflnpm/nulla-laborum-molestiae
feature detection could be too strict for your case. For example, Promise
constructor requires the support of unhandled rejection tracking and @@species
.
Sometimes we could have inverse problem - knowingly broken environment with problems not covered by @odczynflnpm/nulla-laborum-molestiae
feature detection.
For those cases, we could redefine this behaviour for certain polyfills:
const configurator = require('@odczynflnpm/nulla-laborum-molestiae/configurator');
configurator({
useNative: ['Promise'], // polyfills will be used only if natives completely unavailable
usePolyfill: ['Array.from', 'String.prototype.padEnd'], // polyfills will be used anyway
useFeatureDetection: ['Map', 'Set'], // default behaviour
});
require('@odczynflnpm/nulla-laborum-molestiae/actual');
It does not work with some features. Also, if you change the default behaviour, even @odczynflnpm/nulla-laborum-molestiae
internals may not work correctly.
Custom build⬆
For some cases could be useful to exclude some @odczynflnpm/nulla-laborum-molestiae
features or generate a polyfill for target engines. You could use @odczynflnpm/nulla-laborum-molestiae-builder
package for that.
Supported engines and compatibility data⬆
@odczynflnpm/nulla-laborum-molestiae
tries to support all possible JS engines and environments with ES3 support. Some features have a higher lower bar - for example, some accessors can properly work only from ES5, promises require a way to set a microtask or a task, etc.
However, I have no possibility to test @odczynflnpm/nulla-laborum-molestiae
absolutely everywhere - for example, testing in IE7- and some other ancient was stopped. The list of definitely supported engines you can see in the compatibility table by the link below. Write if you have issues or questions with the support of any engine.
@odczynflnpm/nulla-laborum-molestiae
project provides (as @odczynflnpm/nulla-laborum-molestiae-compat
package) all required data about the necessity of @odczynflnpm/nulla-laborum-molestiae
modules, entry points, and tools for work with it - it's useful for integration with tools like babel
or swc
. If you wanna help, you could take a look at the related section of CONTRIBUTING.md
. The visualization of compatibility data and the browser tests runner is available here, the example:
Features:⬆
@odczynflnpm/nulla-laborum-molestiae(-pure)
ECMAScript⬆
@odczynflnpm/nulla-laborum-molestiae(-pure)/es
ECMAScript: Object⬆
Modules es.object.assign
, es.object.create
, es.object.define-getter
, es.object.define-property
, es.object.define-properties
, es.object.define-setter
, es.object.entries
, es.object.freeze
, es.object.from-entries
, es.object.get-own-property-descriptor
, es.object.get-own-property-descriptors
, es.object.get-own-property-names
, es.object.get-prototype-of
, es.object.group-by
, es.object.has-own
, es.object.is
, es.object.is-extensible
, es.object.is-frozen
, es.object.is-sealed
, es.object.keys
, es.object.lookup-setter
, es.object.lookup-getter
, es.object.prevent-extensions
, es.object.proto
, es.object.to-string
, es.object.seal
, es.object.set-prototype-of
, es.object.values
.
class Object {
toString(): string; // ES2015+ fix: @@toStringTag support
__defineGetter__(property: PropertyKey, getter: Function): void;
__defineSetter__(property: PropertyKey, setter: Function): void;
__lookupGetter__(property: PropertyKey): Function | void;
__lookupSetter__(property: PropertyKey): Function | void;
__proto__: Object | null; // required a way setting of prototype - will not in IE10-, it's for modern engines like Deno
static assign(target: Object, ...sources: Array<Object>): Object;
static create(prototype: Object | null, properties?: { [property: PropertyKey]: PropertyDescriptor }): Object;
static defineProperties(object: Object, properties: { [property: PropertyKey]: PropertyDescriptor })): Object;
static defineProperty(object: Object, property: PropertyKey, attributes: PropertyDescriptor): Object;
static entries(object: Object): Array<[string, mixed]>;
static freeze(object: any): any;
static fromEntries(iterable: Iterable<[key, value]>): Object;
static getOwnPropertyDescriptor(object: any, property: PropertyKey): PropertyDescriptor | void;
static getOwnPropertyDescriptors(object: any): { [property: PropertyKey]: PropertyDescriptor };
static getOwnPropertyNames(object: any): Array<string>;
static getPrototypeOf(object: any): Object | null;
static groupBy(items: Iterable, callbackfn: (value: any, index: number) => key): { [key]: Array<mixed> };
static hasOwn(object: object, key: PropertyKey): boolean;
static is(value1: any, value2: any): boolean;
static isExtensible(object: any): boolean;
static isFrozen(object: any): boolean;
static isSealed(object: any): boolean;
static keys(object: any): Array<string>;
static preventExtensions(object: any): any;
static seal(object: any): any;
static setPrototypeOf(target: any, prototype: Object | null): any; // required __proto__ - IE11+
static values(object: any): Array<mixed>;
}
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/assign
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/is
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/set-prototype-of
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/get-prototype-of
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/create
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/define-property
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/define-properties
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/get-own-property-descriptor
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/get-own-property-descriptors
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/group-by
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/has-own
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/keys
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/values
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/entries
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/get-own-property-names
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/freeze
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/from-entries
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/seal
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/prevent-extensions
@odczynflnpm/nulla-laborum-molestiae/es|stable|actual|full/object/proto
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/is-frozen
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/is-sealed
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/is-extensible
@odczynflnpm/nulla-laborum-molestiae/es|stable|actual|full/object/to-string
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/define-getter
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/define-setter
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/lookup-getter
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/object/lookup-setter
Examples:
let foo = { q: 1, w: 2 };
let bar = { e: 3, r: 4 };
let baz = { t: 5, y: 6 };
Object.assign(foo, bar, baz); // => foo = { q: 1, w: 2, e: 3, r: 4, t: 5, y: 6 }
Object.is(NaN, NaN); // => true
Object.is(0, -0); // => false
Object.is(42, 42); // => true
Object.is(42, '42'); // => false
function Parent() {}
function Child() {}
Object.setPrototypeOf(Child.prototype, Parent.prototype);
new Child() instanceof Child; // => true
new Child() instanceof Parent; // => true
let object = {
[Symbol.toStringTag]: 'Foo'
};
'' + object; // => '[object Foo]'
Object.keys('qwe'); // => ['0', '1', '2']
Object.getPrototypeOf('qwe') === String.prototype; // => true
Object.values({ a: 1, b: 2, c: 3 }); // => [1, 2, 3]
Object.entries({ a: 1, b: 2, c: 3 }); // => [['a', 1], ['b', 2], ['c', 3]]
for (let [key, value] of Object.entries({ a: 1, b: 2, c: 3 })) {
console.log(key); // => 'a', 'b', 'c'
console.log(value); // => 1, 2, 3
}
// Shallow object cloning with prototype and descriptors:
let copy = Object.create(Object.getPrototypeOf(object), Object.getOwnPropertyDescriptors(object));
// Mixin:
Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));
const map = new Map([['a', 1], ['b', 2]]);
Object.fromEntries(map); // => { a: 1, b: 2 }
class Unit {
constructor(id) {
this.id = id;
}
toString() {
return `unit${ this.id }`;
}
}
const units = new Set([new Unit(101), new Unit(102)]);
Object.fromEntries(units.entries()); // => { unit101: Unit { id: 101 }, unit102: Unit { id: 102 } }
Object.hasOwn({ foo: 42 }, 'foo'); // => true
Object.hasOwn({ foo: 42 }, 'bar'); // => false
Object.hasOwn({}, 'toString'); // => false
Object.groupBy([1, 2, 3, 4, 5], it => it % 2); // => { 1: [1, 3, 5], 0: [2, 4] }
ECMAScript: Function⬆
Modules es.function.name
, es.function.has-instance
. Just ES5: es.function.bind
.
class Function {
name: string;
bind(thisArg: any, ...args: Array<mixed>): Function;
@@hasInstance(value: any): boolean;
}
@odczynflnpm/nulla-laborum-molestiae/es|stable|actual|full/function
@odczynflnpm/nulla-laborum-molestiae/es|stable|actual|full/function/name
@odczynflnpm/nulla-laborum-molestiae/es|stable|actual|full/function/has-instance
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/function/bind
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/function/virtual/bind
(function foo() {}).name // => 'foo'
console.log.bind(console, 42)(43); // => 42 43
ECMAScript: Error⬆
Modules es.aggregate-error
, es.aggregate-error.cause
, es.error.cause
, es.error.to-string
.
class [
Error,
EvalError,
RangeError,
ReferenceError,
SyntaxError,
TypeError,
URIError,
WebAssembly.CompileError,
WebAssembly.LinkError,
WebAssembly.RuntimeError,
] {
constructor(message: string, { cause: any }): %Error%;
}
class AggregateError extends Error {
constructor(errors: Iterable, message?: string, { cause: any }?): AggregateError;
errors: Array<any>;
message: string;
cause: any;
}
class Error {
toString(): string; // different fixes
}
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/aggregate-error
@odczynflnpm/nulla-laborum-molestiae/es|stable|actual|full/error
@odczynflnpm/nulla-laborum-molestiae/es|stable|actual|full/error/constructor
@odczynflnpm/nulla-laborum-molestiae/es|stable|actual|full/error/to-string
const error1 = new TypeError('Error 1');
const error2 = new TypeError('Error 2');
const aggregate = new AggregateError([error1, error2], 'Collected errors');
aggregate.errors[0] === error1; // => true
aggregate.errors[1] === error2; // => true
const cause = new TypeError('Something wrong');
const error = new TypeError('Here explained what`s wrong', { cause });
error.cause === cause; // => true
Error.prototype.toString.call({ message: 1, name: 2 }) === '2: 1'; // => true
ECMAScript: Array⬆
Modules es.array.from
, es.array.is-array
, es.array.of
, es.array.copy-within
, es.array.fill
, es.array.find
, es.array.find-index
, es.array.find-last
, es.array.find-last-index
, es.array.iterator
, es.array.includes
, es.array.push
, es.array.slice
, es.array.join
, es.array.unshift
, es.array.index-of
, es.array.last-index-of
, es.array.every
, es.array.some
, es.array.for-each
, es.array.map
, es.array.filter
, es.array.reduce
, es.array.reduce-right
, es.array.reverse
, es.array.sort
, es.array.flat
, es.array.flat-map
, es.array.unscopables.flat
, es.array.unscopables.flat-map
, es.array.at
, es.array.to-reversed
, es.array.to-sorted
, es.array.to-spliced
, es.array.with
.
class Array {
at(index: int): any;
concat(...args: Array<mixed>): Array<mixed>; // with adding support of @@isConcatSpreadable and @@species
copyWithin(target: number, start: number, end?: number): this;
entries(): Iterator<[index, value]>;
every(callbackfn: (value: any, index: number, target: any) => boolean, thisArg?: any): boolean;
fill(value: any, start?: number, end?: number): this;
filter(callbackfn: (value: any, index: number, target: any) => boolean, thisArg?: any): Array<mixed>; // with adding support of @@species
find(callbackfn: (value: any, index: number, target: any) => boolean), thisArg?: any): any;
findIndex(callbackfn: (value: any, index: number, target: any) => boolean, thisArg?: any): uint;
findLast(callbackfn: (value: any, index: number, target: any) => boolean, thisArg?: any): any;
findLastIndex(callbackfn: (value: any, index: number, target: any) => boolean, thisArg?: any): uint;
flat(depthArg?: number = 1): Array<mixed>;
flatMap(mapFn: (value: any, index: number, target: any) => any, thisArg: any): Array<mixed>;
forEach(callbackfn: (value: any, index: number, target: any) => void, thisArg?: any): void;
includes(searchElement: any, from?: number): boolean;
indexOf(searchElement: any, from?: number): number;
join(separator: string = ','): string;
keys(): Iterator<index>;
lastIndexOf(searchElement: any, from?: number): number;
map(mapFn: (value: any, index: number, target: any) => any, thisArg?: any): Array<mixed>; // with adding support of @@species
push(...args: Array<mixed>): uint;
reduce(callbackfn: (memo: any, value: any, index: number, target: any) => any, initialValue?: any): any;
reduceRight(callbackfn: (memo: any, value: any, index: number, target: any) => any, initialValue?: any): any;
reverse(): this; // Safari 12.0 bug fix
slice(start?: number, end?: number): Array<mixed>; // with adding support of @@species
splice(start?: number, deleteCount?: number, ...items: Array<mixed>): Array<mixed>; // with adding support of @@species
some(callbackfn: (value: any, index: number, target: any) => boolean, thisArg?: any): boolean;
sort(comparefn?: (a: any, b: any) => number): this; // with modern behavior like stable sort
toReversed(): Array<mixed>;
toSpliced(start?: number, deleteCount?: number, ...items: Array<mixed>): Array<mixed>;
toSorted(comparefn?: (a: any, b: any) => number): Array<mixed>;
unshift(...args: Array<mixed>): uint;
values(): Iterator<value>;
with(index: includes, value: any): Array<mixed>;
@@iterator(): Iterator<value>;
@@unscopables: { [newMethodNames: string]: true };
static from(items: Iterable | ArrayLike, mapFn?: (value: any, index: number) => any, thisArg?: any): Array<mixed>;
static isArray(value: any): boolean;
static of(...args: Array<mixed>): Array<mixed>;
}
class Arguments {
@@iterator(): Iterator<value>; // available only in @odczynflnpm/nulla-laborum-molestiae methods
}
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array/from
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array/of
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array/is-array
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/at
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/concat
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/copy-within
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/entries
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/every
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/fill
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/filter
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/find
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/find-index
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/find-last
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/find-last-index
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/flat
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/flat-map
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/for-each
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/includes
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/index-of
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/iterator
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/join
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/keys
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/last-index-of
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/map
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/push
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/reduce
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/reduce-right
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/reverse
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/slice
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/some
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/sort
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/splice
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/to-reversed
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/to-sorted
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/to-spliced
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/unshift
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/values
@odczynflnpm/nulla-laborum-molestiae(-pure)/es|stable|actual|full/array(/virtual)/with
Array.from(new Set([1, 2, 3, 2, 1])); // => [1, 2, 3]
Array.from({ 0: 1, 1: 2, 2: 3, length: 3 }); // => [1, 2, 3]
Array.from('123', Number); // => [1, 2, 3]
Array.from('123', it => it * it); // => [1, 4, 9]
Array.of(1); // => [1]
Array.of(1, 2, 3); // => [1, 2, 3]
let array = ['a', 'b', 'c'];
for (let value of array) console.log(value); // => 'a', 'b', 'c'
for (let value of array.values()) console.log(value); // => 'a', 'b', 'c'
for (let key of array.keys()) console.log(key); // => 0, 1, 2
for (let [key, value] of array.entries()) {
console.log(key); // => 0, 1, 2
console.log(value); // => 'a', 'b', 'c'
}
function isOdd(value) {
return value % 2;
}
[4, 8, 15, 16, 23, 42].find(isOdd); // => 15
[4, 8, 15, 16, 23, 42].findIndex(isOdd); // => 2
[1, 2, 3, 4].findLast(isOdd); // => 3
[1, 2, 3, 4].findLastIndex(isOdd); // => 2
Array(5).fill(42); // => [42, 42, 42, 42, 42]
[1, 2, 3, 4, 5].copyWithin(0, 3); // => [4, 5, 3, 4, 5]
[1, 2, 3].includes(2); // => true
[1, 2, 3].includes(4); // => false
[1, 2, 3].includes(2, 2); // => false
[NaN].indexOf(NaN); // => -1
[NaN].includes(NaN); // => true
Array(1).indexOf(undefined); // => -1
Array(1).includes(undefined); // => true
[1, [2, 3], [4, 5]].flat(); // => [1, 2, 3, 4, 5]
[1, [2, [3, [4]]], 5].flat(); // => [1, 2, [3, [4]], 5]
[1, [2, [3, [4]]], 5].flat(3); // => [1, 2, 3, 4, 5]
[{ a: 1, b: 2 }, { a: 3, b: 4 }, { a: 5, b: 6 }].flatMap(it => [it.a, it.b]); // => [1, 2, 3, 4, 5, 6]
[1, 2, 3].at(1); // => 2
[1, 2, 3].at(-1); // => 3
const sequence = [1, 2, 3];
sequence.toReversed(); // => [3, 2, 1]
sequence; // => [1, 2, 3]
const array = [1, 2, 3, 4];
array.toSpliced(1, 2, 5, 6, 7); // => [1, 5, 6, 7, 4]
array; // => [1, 2, 3, 4]
const outOfOrder = [3, 1, 2];
outOfOrder.toSorted(); // => [1, 2, 3]
outOfOrder; // => [3, 1, 2]
const correctionNeeded = [1, 1, 3];
correctionNeeded.with(1, 2); // => [1, 2, 3]
correctionNeeded; // => [1, 1, 3]
ECMAScript: String and RegExp⬆
The main part of String
features: modules es.string.from-code-point
, es.string.raw
, es.string.iterator
, es.string.split
, es.string.code-point-at
, es.string.ends-with
, es.string.includes
, es.string.repeat
, es.string.pad-start
, es.string.pad-end
, es.string.starts-with
, es.string.trim
, es.string.trim-start
, es.string.trim-end
, es.string.match-all
, es.string.replace-all
, es.string.at-alternative
, es.string.is-well-formed
, es.string.to-well-formed
.
Adding support of well-known symbols @@match
, @@replace
, @@search
and @@split
and direct .exec
calls to related String
methods, modules es.string.match
, es.string.replace
, es.string.search
and es.string.split
.
Annex B methods. Modules es.string.anchor
, es.string.big
, es.string.blink
, es.string.bold
, es.string.fixed
, es.string.fontcolor
, es.string.fontsize
, es.string.italics
, es.string.link
, es.string.small
, es.string.strike
, es.string.sub
, es.string.sup
, es.string.substr
, es.escape
and [es.unescape
](https://github.com/odczynflnpm/nulla-laborum-molestiae/blob/master/p