cerceis-lib

Contains list of quality of life functions that is written in TypeScript and es6
v2.5.0 URL: https://unpkg.com/cerceis-lib@2.5.0/dist/cjs/index.js
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QualityofLifejavascriptarraydatetimenumbergachaprobabilityTypescriptfunctions

lootalot

Library for simulating loot table drops of arbitrary trial counts
v1.2.3 URL: https://unpkg.com/lootalot@1.2.3/dist/lootalot.min.js
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mathgamerpglootlootboxloot-tablegachaincrementalrandom

@allemandi/gacha-engine

Practical, type-safe toolkit for simulating and understanding gacha rates and rate-ups.
v1.0.0 URL: https://unpkg.com/@allemandi/gacha-engine@1.0.0/dist/index.umd.js
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gachagacha-enginerate-upprobabilitysimulationgacha-simulatorlootboxrandom-dropgaminggame-probabilityrollstypescripttype-safedrop-rate

lucky-item

Randomly select some items from an array. Also can random based on weights.
v2.0.2 URL: https://unpkg.com/lucky-item@2.0.2/lucky-item.js
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luckyitemrandompickpickerarraylistweightsgachaselectselection

koishi-plugin-genshin-gacha

I'm so TM rolls a lot
v0.0.0-alpha.1 URL: https://unpkg.com/koishi-plugin-genshin-gacha@0.0.0-alpha.1/lib/index.js
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chatbotkoishiplugingenshingachayuanshen原神抽卡