{"id":69644,"library":"cats-laws-sjs1-3","title":"Cats Laws (Scala.js 1.3)","description":"Cats laws for Scala.js 1.3, providing law-checking utilities for functional programming abstractions.","status":"active","version":"2.13.0","language":"java","source_language":null,"source_url":"https://github.com/typelevel/cats","tags":["cats","laws","scalajs","functional-programming"],"install":[{"cmd":"<dependency>\n  <groupId>org.typelevel</groupId>\n  <artifactId>cats-laws_sjs1_3</artifactId>\n  <version>2.13.0</version>\n</dependency>","lang":"xml","label":"Maven"},{"cmd":"implementation 'org.typelevel:cats-laws_sjs1_3:2.13.0'","lang":"groovy","label":"Gradle"}],"dependencies":[],"imports":[{"symbol":"FunctorTests","correct":"cats.laws.discipline.FunctorTests"}],"quickstart":{"code":"import cats.laws.discipline.FunctorTests\nimport org.scalacheck.Arbitrary\n\nclass MyFunctorSuite extends munit.DisciplineSuite {\n  checkAll(\"Option.FunctorLaws\", FunctorTests[Option].functor[Int, String, Double])\n}","lang":"scala","description":"Tests functor laws for Option using Cats laws."},"warnings":[{"fix":"Use the appropriate artifact for your Scala.js version (e.g., cats-laws_sjs1 for Scala.js 1.x).","message":"This artifact is for Scala.js 1.3; ensure your project uses the correct Scala.js version.","severity":"breaking","affected_versions":"*"}],"env_vars":null,"search_vec":"'1.3':4,9 'abstract':18 'cat':1,5,19 'check':13 'function':16,23 'functional-program':22 'law':2,6,12,20 'law-check':11 'program':17,24 'provid':10 'scala.js':3,8 'scalaj':21 'util':14","created_at":"2026-06-17T18:04:09.386788+00:00","updated_at":"2026-06-17T18:04:09.386788+00:00","problems":[],"ecosystem":"maven","meta_description":null,"install_score":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":null,"cli_name":null,"cli_version":null,"type":"library","homepage":"https://typelevel.org/cats","github":"https://github.com/typelevel/cats","docs":"https://appdoc.app/artifact/org.typelevel/cats-laws_sjs1_3/","changelog":null,"pypi":null,"npm":null,"openapi_spec":null,"status_page":null,"smithery":null,"categories":["testing"],"base_url":null,"auth_type":null,"provenance":{"verified_status":null,"verified_at":null,"last_verified":"2026-06-17","next_check":"2026-12-14","install_tag":null}}