The missing existential operator for JavaScript. Returns true unless a variable is null or undefined

Optional chaining (aka existential operator, safe navigation) support in TypeScript via the non-null assertion operator

CoffeeLint plugin for prohibiting accessor with existential operator.

Check for the existential value of a variable. Assign value by default.

Flowtype linting rules for ESLint.

Flowtype linting rules for ESLint by flow-typed

Allow parsing of the nullish-coalescing operator

Elvis operator functionality for JavaScript.

Remove nullish coalescing operator

Compile exponentiation operator to ES5

Helper function to build binary assignment operator visitors

Access nested object properties via strings

A utility to allow for safe accessing of nested properties

deterministic `JSON.stringify()` - a faster version of substack's json-stable-strigify without jsonify

deterministic JSON.stringify() with custom sorting to get deterministic hashes from stringified results, with no public domain dependencies

Recursive object extending

The `themeGet` function is an existential getter function that can be used in any style declaration to get a value from your theme, with support for fallback values. This helps prevent errors from throwing when a theme value is missing, which can be helpf

Pythonic JavaScript that doesn't suck

Turn any collection of objects into its own efficient tree or linked list using Symbol

Support for representing 64-bit integers in JavaScript