What is this?

Javascript utilities for working with rock climbing grades.

Supported systems

Sport & Traditional climbing

[x] Yosemite Decimal System
[x] French
[x] UIAA
[x] Ewbanks
[x] Saxon
[x] Brazilian

Bouldering

[x] Vermin (V-scale)
[x] Fontainebleau

Aid

[x] A# & C#
[ ] Aid with mandatory free climbing (5.8 A0, etc)

Ice

[x] Winter Ice (WI#)
[x] Alpine Ice (AI#)

Help Wanted

Code contributions are most welcome!

Questions?

Join us on Discord.

How to use the library

Install the package

Using NPM

npm install @openbeta/sandbag

Using Yarn

yarn add @openbeta/sandbag

Sample Usage

Convert Grades to Scores

import { French, YosemiteDecimal } from '@openbeta/sandbag'

const score = French.getScore('8a') // Output [ 84, 85 ]

// Support slash grade
const slashGradeScore=French.getScore('7c+/8a') // Output [ 83, 84 ]

// Accept +/- modifier
const plusGrade= YosemiteDecimal.getScore('5.12+') // Output [ 79, 80 ]

Convert Scores to Grades

import { Font } from '@openbeta/sandbag'

// Single score provided
Font.getGrade(80) // Output '7c'

// Support a range of scores 
Font.getGrade([79,81]) // Output'7b+/7c'

Validate Grading Scales

import { VScale , Font }from '@openbeta/sandbag'

console.log('Is 6A a V Scale?',VScale.isType('6A'))  // Output false
console.log('Is 6A a Font Scale?',Font.isType('6A')) // Output true

Convert Grades Across Scales

import {convertGrade , GradeScales }from '@openbeta/sandbag'

const ydsInFrench=convertGrade('5.11a',GradeScales.YDS,GradeScales.FRENCH) // Output '6b+/6c'

const fontInVScale=convertGrade('6a',GradeScales.FONT,GradeScales.VSCALE) //OutPut 'V3'

// Conversions across different disciplines are not allowed
const sportToBoulder=convertGrade('5.11a',GradeScales.YDS,GradeScales.VSCALE)
// Output: Scale: Yosemite Decimal System doesn't support converting to Scale: V Scale
// ''

Get Gradeband

import { Ewbank } from '@openbeta/sandbag'

Ewbank.getGradeBand('10') // Output: 'beginner'
Ewbank.getGradeBand('30') // Output: 'expert'
Ewbank.getGradeBand('6a') // Output: Unexpected grade format: 6a for grade scale Ewbank 'unknown'

Compare Grades

import { French, YosemiteDecimal } from '@openbeta/sandbag'

const harder = French.getScore('8a')  // Output: [ 84, 85 ]
const easier = YosemiteDecimal.getScore('5.13a') // Output: [ 82, 83 ]

console.log('Is 8a harder than 5.13a?',harder > easier) // Output: true

See unit tests for more examples.

Development (TBD)

yarn install
yarn test

Generating Test Coverage Report

To generate a test coverage report using Jest run the following command in your terminal:

npx jest --coverage

If you're using macOS, you can directly access the coverage report in your browser by opening the following URL:

file:///Users/<userName>/sandbag/coverage/lcov-report/index.html

How to publish a new release to NPM

Submit a PR with commit message [npm publish]

Project Maintainers

License

MIT

Contributors ✨

Thanks goes to these wonderful people (emoji key):

_AntoineM 💻 🤔	_{Kendra Gibbons} 💻 🤔	_{MichaelDimmitt} 💻	_{Clinton Lunn} 💻	_{Darren Lew} 💻 🤔	_Klaus 💻 🤔	_{Nathan Musoke} 💻 🤔
_{Talia Aleyna Hortac} 💻	_{Yun Ji} 💻 🤔	_{Josh Zimmerman} 💻	_{John Roberts} 💻 🤔	_{Joey Marino} 💻 🤔	_{Iacami Gevaerd} 💻 🤔