seznam/visibility-observer

hashmap + constructor function = a hashmap you don't have to check before calling get()

The extendable JavaScript mutation testing framework

An html reporter for the JavaScript mutation testing framework Stryker

A plugin to use the jest test runner and framework in Stryker, the JavaScript mutation testing framework

A plugin for TypeScript-based projects using Stryker

TypeScript definitions for jest

Delightful JavaScript Testing.

A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript

An extensible static analysis linter for the TypeScript language

TypeScript is a language for application scale JavaScript development

Efficiently use an Observer (i.e. IntersectionObserver) without the ugly observer callback. `insular-observer` gives you a simple, per-target `observe/unobserve` API that uses the same observer instance internally.