What is this?

Javascript utilities for working with rock climbing grades.

Supported systems

Sport & Traditional climbing

• Yosemite Decimal System
• French
• UIAA
• Ewbanks
• Saxon

Bouldering

• Vermin (V-scale)
• Fontainebleau

Aid

• A# & C#
• Aid with mandatory free climbing (5.8 A0, etc)

Ice

• Winter Ice (WI#)
• Alpine Ice (AI#)

Help Wanted

Code contributions are most welcome!

Questions?

Join us on Discord.

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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

How to publish a new release to NPM

Submit a PR with commit message [npm publish]

Project Maintainers

• Nathan Musoke
• Viet Nguyen

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 💻 🤔

This project follows the all-contributors specification. Contributions of any kind welcome!