npmpackage.info

nth-check

Parses and compiles CSS nth-checks to highly optimized functions.

2.1.1

BSD-2-Clause

TypeScript

Installations

npm install nth-check

Score

99.6

Supply Chain

100

Quality

75.5

Maintenance

100

Vulnerability

100

License

Pull Requests

Open

1

Total

808

Closed

57

Merged

750

Issues

Open

1

Total

13

Closed

12

Releases

v2.1.1

Published on 23 May 2022

v2.1.0

Published on 22 May 2022

v2.0.1

Published on 16 Sept 2021

v2.0.0

Published on 01 Dec 2020

View all 4 releases

Contributors

View all 6 contributors

Developer

fb55

Developer Guide

BETA

Module System

CommonJS, ESM

Min. Node Version

Typescript Support

Yes

Node Version

18.2.0

NPM Version

8.9.0 Statistics

57 Stars

781 Commits

30 Forks

3 Watching

2 Branches

6 Contributors

Updated on 28 Nov 2024

Languages

TypeScript (100%)

Total Downloads

Cumulative downloads

Total Downloads

5,345,381,397

Last day

-21.3%

3,915,961

Compared to previous day

Last week

-8.7%

27,830,542

Compared to previous week

Last month

2.1%

123,319,576

Compared to previous month

Last year

4.4%

1,330,364,669

Compared to previous year

Daily Downloads

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dependencies

boolbase

Dev Dependencies

@types/boolbase @types/jest @types/node @typescript-eslint/eslint-plugin @typescript-eslint/parser eslint eslint-config-prettier jest prettier ts-jest typescript

Versions

nth-check

Parses and compiles CSS nth-checks to highly optimized functions.

About

This module can be used to parse & compile nth-checks, as they are found in CSS 3's nth-child() and nth-last-of-type(). It can be used to check if a given index matches a given nth-rule, or to generate a sequence of indices matching a given nth-rule.

nth-check focusses on speed, providing optimized functions for different kinds of nth-child formulas, while still following the spec.

API

1import nthCheck, { parse, compile } from "nth-check";

`nthCheck(formula)`

Parses and compiles a formula to a highly optimized function. Combination of parse and compile.

If the formula doesn't match any elements, it returns boolbase's falseFunc. Otherwise, a function accepting an index is returned, which returns whether or not the passed index matches the formula.

Note: The nth-rule starts counting at 1, the returned function at 0.

Example:

1const check = nthCheck("2n+3");
2
3check(0); // `false`
4check(1); // `false`
5check(2); // `true`
6check(3); // `false`
7check(4); // `true`
8check(5); // `false`
9check(6); // `true`

`parse(formula)`

Parses the expression, throws an Error if it fails. Otherwise, returns an array containing the integer step size and the integer offset of the nth rule.

Example:

1parse("2n+3"); // [2, 3]

`compile([a, b])`

Takes an array with two elements (as returned by .parse) and returns a highly optimized function.

Example:

1const check = compile([2, 3]);
2
3check(0); // `false`
4check(1); // `false`
5check(2); // `true`
6check(3); // `false`
7check(4); // `true`
8check(5); // `false`
9check(6); // `true`

`generate([a, b])`

Returns a function that produces a monotonously increasing sequence of indices.

If the sequence has an end, the returned function will return null after the last index in the sequence.

Example: An always increasing sequence

1const gen = nthCheck.generate([2, 3]);
2
3gen(); // `1`
4gen(); // `3`
5gen(); // `5`
6gen(); // `8`
7gen(); // `11`

Example: With an end value

1const gen = nthCheck.generate([-2, 5]);
2
3gen(); // 0
4gen(); // 2
5gen(); // 4
6gen(); // null

`sequence(formula)`

Parses and compiles a formula to a generator that produces a sequence of indices. Combination of parse and generate.

Example: An always increasing sequence

1const gen = nthCheck.sequence("2n+3");
2
3gen(); // `1`
4gen(); // `3`
5gen(); // `5`
6gen(); // `8`
7gen(); // `11`

Example: With an end value

1const gen = nthCheck.sequence("-2n+5");
2
3gen(); // 0
4gen(); // 2
5gen(); // 4
6gen(); // null

License: BSD-2-Clause

Security contact information

To report a security vulnerability, please use the Tidelift security contact. Tidelift will coordinate the fix and disclosure.

`nth-check` for enterprise

Available as part of the Tidelift Subscription

The maintainers of nth-check and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source dependencies you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use. Learn more.

Stable Version

The latest stable version of the package.

Stable Version

2.1.1

HIGH

7.5/10

Summary

Inefficient Regular Expression Complexity in nth-check

Affected Versions

< 2.0.1

Patched Versions

2.0.1

10

Maintained

Determines if the project is "actively maintained".

10

Binary-Artifacts

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

10

Dangerous-Workflow

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

10

License

Determines if the project has defined a license.

10

SAST

Determines if the project uses static code analysis.

8

Vulnerabilities

Determines if the project has open, known unfixed vulnerabilities.

4

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 4

Details

Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/codeql-analysis.yml:23: update your workflow using https://app.stepsecurity.io/secureworkflow/fb55/nth-check/codeql-analysis.yml/master?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/codeql-analysis.yml:26: update your workflow using https://app.stepsecurity.io/secureworkflow/fb55/nth-check/codeql-analysis.yml/master?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/codeql-analysis.yml:31: update your workflow using https://app.stepsecurity.io/secureworkflow/fb55/nth-check/codeql-analysis.yml/master?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/dependabot-automerge.yml:16: update your workflow using https://app.stepsecurity.io/secureworkflow/fb55/nth-check/dependabot-automerge.yml/master?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/nodejs-test.yml:21: update your workflow using https://app.stepsecurity.io/secureworkflow/fb55/nth-check/nodejs-test.yml/master?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/nodejs-test.yml:22: update your workflow using https://app.stepsecurity.io/secureworkflow/fb55/nth-check/nodejs-test.yml/master?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/nodejs-test.yml:46: update your workflow using https://app.stepsecurity.io/secureworkflow/fb55/nth-check/nodejs-test.yml/master?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/nodejs-test.yml:48: update your workflow using https://app.stepsecurity.io/secureworkflow/fb55/nth-check/nodejs-test.yml/master?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/nodejs-test.yml:64: update your workflow using https://app.stepsecurity.io/secureworkflow/fb55/nth-check/nodejs-test.yml/master?enable=pin
Info: 0 out of 7 GitHub-owned GitHubAction dependencies pinned
Info: 0 out of 2 third-party GitHubAction dependencies pinned
Info: 2 out of 2 npmCommand dependencies pinned

0

Token-Permissions

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

0

CII-Best-Practices

Determines if the project has an OpenSSF (formerly CII) Best Practices Badge.

0

Security-Policy

Determines if the project has published a security policy.

0

Fuzzing

Determines if the project uses fuzzing.

Score

6.2

/10

Last Scanned on 2024-11-25

The Open Source Security Foundation is a cross-industry collaboration to improve the security of open source software (OSS). The Scorecard provides security health metrics for open source projects.

Learn More

Other packages similar to nth-check

esquery

1.6.0

A query library for ECMAScript AST using a CSS selector like query language.

cheerio-select

2.1.0

CSS selector engine supporting jQuery selectors

@stdlib/constants-float64-max-safe-nth-factorial

0.1.0

Maximum safe nth factorial when stored in double-precision floating-point format.

croner

9.0.0

Trigger functions and/or evaluate cron expressions in JavaScript. No dependencies. Most features. All environments.

nth-check

Installations

Score

Pull Requests

1

808

57

750

Issues

1

13

12

Releases

Contributors

Developer

fb55

Developer Guide

CommonJS, ESM

Yes

18.2.0

8.9.0

Statistics

Languages

Total Downloads

5,345,381,397

Daily Downloads

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dependencies

Dev Dependencies

nth-check

About

API

nthCheck(formula)

parse(formula)

compile([a, b])

generate([a, b])

sequence(formula)

Security contact information

nth-check for enterprise

Stable Version

2.1.1

HIGH

10

10

10

10

10

8

4

0

0

0

0

6.2

/10

Other packages similar to nth-check

`nthCheck(formula)`

`parse(formula)`

`compile([a, b])`

`generate([a, b])`

`sequence(formula)`

`nth-check` for enterprise