ajv

Another JSON Schema Validator

v8.17.1 URL: https://unpkg.com/ajv@8.17.1/dist/ajv.js

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JSON schema validator validation jsonschema json-schema json-schema-validator json-schema-validation

ajv-formats

Format validation for Ajv v7+

v3.0.1 URL: https://unpkg.com/ajv-formats@3.0.1/dist/index.js

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Ajv JSON-Schema format validation

zod

TypeScript-first schema declaration and validation library with static type inference

v3.25.64 URL: https://unpkg.com/zod@3.25.64/dist/cjs/index.js

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typescript schema validation type inference

validate-npm-package-license

Give me a string and I'll tell you if it's a valid npm package license string

v3.0.4 URL: https://unpkg.com/validate-npm-package-license@3.0.4/index.js

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license npm package validation

css-tree

A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations

v3.1.0 URL: https://unpkg.com/css-tree@3.1.0/dist/csstree.esm.js

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css ast tokenizer parser walker lexer generator utils syntax validation