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@stdlib/utils-constructor-name

Determine the name of a value's constructor.

0.2.2

Apache-2.0

JavaScript

2.90 kB

73,665,936 4.5

Installations

npm install @stdlib/utils-constructor-name

Developer Guide

BETA

Typescript

Yes

Module System

CommonJS

Min. Node Version

>=0.10.0

Node Version

16.20.2

NPM Version

8.19.4 Score

99.5

Supply Chain

92.4

Quality

82.3

Maintenance

100

Vulnerability

License

Pull Requests

Open

0

Total

0

Closed

0

Issues

Open

0

Total

0

Closed

0

Releases

Unable to fetch releases

Contributors

Unable to fetch Contributors

View All 11 Contributors

Languages

JavaScript

JavaScript (100%)

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Developer

stdlib-js

Download Statistics

Total Downloads

73,665,936

Last Day

84,776

Last Week

416,836

Last Month

1,903,188

Last Year

27,848,189

GitHub Statistics

Apache-2.0 License

2 Stars

70 Commits

3 Watchers

5 Branches

11 Contributors

Updated on Feb 03, 2025

Bundle Size

9.34 kB

Minified

2.90 kB

Minified + Gzipped

Bundlephobia

Sponsor this package

https://opencollective.com/stdlib

Maintainers

Package Meta Information

Latest Version

0.2.2

Package Id

@stdlib/utils-constructor-name@0.2.2

Unpacked Size

34.35 kB

Size

9.37 kB

File Count

NPM Version

8.19.4

Node Version

16.20.2

Published on

Jul 27, 2024

Total Downloads

Cumulative downloads

Total Downloads

73,665,936

Last Day

-2.1%

84,776

Compared to previous day

Last Week

-6.3%

416,836

Compared to previous week

Last Month

46.7%

1,903,188

Compared to previous month

Last Year

-20%

27,848,189

Compared to previous year

Daily Downloads

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dependencies

@stdlib/assert-is-buffer @stdlib/regexp-function-name @stdlib/utils-native-class

About stdlib...

We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.

To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!

Constructor Name

Determine the name of a value's constructor.

Installation

1npm install @stdlib/utils-constructor-name

Usage

1var constructorName = require( '@stdlib/utils-constructor-name' );

constructorName( value )

Returns the name of a value's constructor.

1var v = constructorName( 'a' );
2// returns 'String'
3
4v = constructorName( 5 );
5// returns 'Number'
6
7function Beep() {
8    return this;
9}
10v = constructorName( new Beep() );
11// returns 'Beep'

description	value	constructor	notes
string	`'beep'`	`'String'`
number	`5`	`'Number'`
NaN	`NaN`	`'Number'`
infinity	`+infinity`/`-infinity`	`'Number'`
boolean	`true`/`false`	`'Boolean'`
null	`null`	`'Null'`
undefined	`undefined`	`'Undefined'`
array	`['beep', 5]`	`'Array'`
object	`{'foo': 'bar'}`	`'Object'`
function	`function (){}`	`'Function'`
symbol	`Symbol()`	`'Symbol'`	ES2015
regexp	`/./`	`'RegExp'`	Android 4.1+
String	`new String('beep')`	`'String'`
Number	`new Number(5)`	`'Number'`
Boolean	`new Boolean(false)`	`'Boolean'`
Object	`new Object()`	`'Object'`
Array	`new Array()`	`'Array'`
Int8Array	`new Int8Array()`	`'Int8Array'`
Uint8Array	`new Uint8Array()`	`'Uint8Array'`
Uint8ClampedArray	`new Uint8ClampedArray()`	`'Uint8ClampedArray'`
Int16Array	`new Int16Array()`	`'Int16Array'`
Uint16Array	`new Uint16Array()`	`'Uint16Array'`
Int32Array	`new Int32Array()`	`'Int32Array'`
Uint32Array	`new Uint32Array()`	`'Uint32Array'`
Float32Array	`new Float32Array()`	`'Float32Array'`
Float64Array	`new Float64Array()`	`'Float64Array'`
ArrayBuffer	`new ArrayBuffer()`	`'ArrayBuffer'`
Buffer	`new Buffer()`	`'Buffer'`	Node.js
Date	`new Date()`	`'Date'`
RegExp	`new RegExp('.')`	`'RegExp'`	Android 4.1+
Function	`new Function('x', 'return x')`	`'Function'`
Map	`new Map()`	`'Map'`	ES2015
WeakMap	`new WeakMap()`	`'WeakMap'`	ES2015
Set	`new Set()`	`'Set'`	ES2015
WeakSet	`new WeakSet()`	`'WeakSet'`	ES2015
Error	`new Error()`	`'Error'`
TypeError	`new TypeError()`	`'TypeError'`
SyntaxError	`new SyntaxError()`	`'SyntaxError'`
ReferenceError	`new ReferenceError()`	`'ReferenceError'`
URIError	`new URIError()`	`'URIError'`
RangeError	`new RangeError()`	`'RangeError'`
EvalError	`new EvalError()`	`'EvalError'`
Math	`Math`	`'Math'`
JSON	`JSON`	`'JSON'`	IE8+
arguments	`(function(){return arguments;})()`	`'Arguments'`	IE9+
custom constructor	`new Beep()`	`'Beep'`
anonymous constructor	`new (function(){})()`	`''`

Notes

If a value's constructor is an anonymous function, the implementation returns an empty string.

1var Beep = function () {
2    return this;
3};
4
5var v = constructorName( new Beep() );
6// returns ''

Examples

1var Float32Array = require( '@stdlib/array-float32' );
2var Float64Array = require( '@stdlib/array-float64' );
3var Int8Array = require( '@stdlib/array-int8' );
4var Int16Array = require( '@stdlib/array-int16' );
5var Int32Array = require( '@stdlib/array-int32' );
6var Uint8Array = require( '@stdlib/array-uint8' );
7var Uint8ClampedArray = require( '@stdlib/array-uint8c' );
8var Uint16Array = require( '@stdlib/array-uint16' );
9var Uint32Array = require( '@stdlib/array-uint32' );
10var ArrayBuffer = require( '@stdlib/array-buffer' );
11var Buffer = require( '@stdlib/buffer-ctor' );
12var Symbol = require( '@stdlib/symbol-ctor' );
13var constructorName = require( '@stdlib/utils-constructor-name' );
14
15function noop() {
16    // Do nothing...
17}
18
19var v = constructorName( 'a' );
20// returns 'String'
21
22v = constructorName( 5 );
23// returns 'Number'
24
25v = constructorName( NaN );
26// returns 'Number'
27
28v = constructorName( null );
29// returns 'Null'
30
31v = constructorName( void 0 );
32// returns 'Undefined'
33
34v = constructorName( true );
35// returns 'Boolean'
36
37v = constructorName( false );
38// returns 'Boolean'
39
40v = constructorName( {} );
41// returns 'Object'
42
43v = constructorName( [] );
44// returns 'Array'
45
46v = constructorName( noop );
47// returns 'Function'
48
49v = constructorName( /./ );
50// returns 'RegExp'
51
52v = constructorName( new Date() );
53// returns 'Date'
54
55v = constructorName( new Map() );
56// returns 'Map'
57
58v = constructorName( new WeakMap() );
59// returns 'WeakMap'
60
61v = constructorName( new Set() );
62// returns 'Set'
63
64v = constructorName( new WeakSet() );
65// returns 'WeakSet'
66
67v = constructorName( Symbol( 'beep' ) );
68// returns 'Symbol'
69
70v = constructorName( new Error() );
71// returns 'Error'
72
73v = constructorName( new TypeError() );
74// returns 'TypeError'
75
76v = constructorName( new SyntaxError() );
77// returns 'SyntaxError'
78
79v = constructorName( new URIError() );
80// returns 'URIError'
81
82v = constructorName( new RangeError() );
83// returns 'RangeError'
84
85v = constructorName( new ReferenceError() );
86// returns 'ReferenceError'
87
88v = constructorName( new EvalError() );
89// returns 'EvalError'
90
91v = constructorName( new Int8Array() );
92// returns 'Int8Array'
93
94v = constructorName( new Uint8Array() );
95// returns 'Uint8Array'
96
97v = constructorName( new Uint8ClampedArray() );
98// returns 'Uint8ClampedArray'
99
100v = constructorName( new Int16Array() );
101// returns 'Int16Array'
102
103v = constructorName( new Uint16Array() );
104// returns 'Uint16Array'
105
106v = constructorName( new Int32Array() );
107// returns 'Int32Array'
108
109v = constructorName( new Uint32Array() );
110// returns 'Uint32Array'
111
112v = constructorName( new Float32Array() );
113// returns 'Float32Array'
114
115v = constructorName( new Float64Array() );
116// returns 'Float64Array'
117
118v = constructorName( new ArrayBuffer() );
119// returns 'ArrayBuffer'
120
121v = constructorName( new Buffer( 'beep' ) );
122// returns 'Buffer'
123
124v = constructorName( Math );
125// returns 'Math'
126
127v = constructorName( JSON );
128// returns 'JSON'
129
130function Person1() {
131    return this;
132}
133v = constructorName( new Person1() );
134// returns 'Person1'
135
136var Person2 = function () {
137    return this;
138};
139v = constructorName( new Person2() );
140// returns ''

Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

Community

License

See LICENSE.

Copyright

No vulnerabilities found.

10

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Determines if the project has generated executable (binary) artifacts in the source repository.

10

License

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10

Dangerous-Workflow

Determines if the project's GitHub Action workflows avoid dangerous patterns.

10

Vulnerabilities

Determines if the project has open, known unfixed vulnerabilities.

9

Security-Policy

Determines if the project has published a security policy.

3

Maintained

Determines if the project is "actively maintained".

3

Pinned-Dependencies

Determines if the project has declared and pinned the dependencies of its build process.

Reason

dependency not pinned by hash detected -- score normalized to 3

Details

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Warn: npmCommand not pinned by hash: .github/workflows/test_published_package.yml:93
Info: 33 out of 33 GitHub-owned GitHubAction dependencies pinned
Info: 19 out of 24 third-party GitHubAction dependencies pinned
Info: 0 out of 32 npmCommand dependencies pinned

0

Code-Review

Determines if the project requires human code review before pull requests (aka merge requests) are merged.

0

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0

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0

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Determines if the project's workflows follow the principle of least privilege.

0

SAST

Determines if the project uses static code analysis.

0

Branch-Protection

Determines if the default and release branches are protected with GitHub's branch protection settings.

Score

4.5

/10

Last Scanned on 2025-02-10

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Learn More

Other packages similar to @stdlib/utils-constructor-name

@stdlib/utils-constructor-name

Installations

Developer Guide

Yes

CommonJS

>=0.10.0

16.20.2

8.19.4

Score

Pull Requests

0

0

0

Issues

0

0

0

Releases

Unable to fetch releases

Contributors

Unable to fetch Contributors

Languages

Developer

Download Statistics

GitHub Statistics

Bundle Size

9.34 kB

2.90 kB

Sponsor this package

Maintainers

Package Meta Information

Total Downloads

73,665,936

Daily Downloads

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dependencies

Constructor Name

Installation

Usage

constructorName( value )

Notes

Examples

See Also

Notice

Community

License

Copyright

10

10

10

10

9

3

3

0

0

0

0

0

0

4.5

/10