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Decorator-based property validation for classes.

Merge objects using their property descriptors

Converts a source-map from/to different formats and allows adding/changing properties.

Turn valid member expression property literals into plain identifiers

Babel plugin for turning __proto__ into a shallow property clone

Force V8 to use fast properties for an object

Turn valid property key literals to plain identifiers

ES Proposal spec-compliant shim for Promise.allSettled

Add a __source prop to all JSX Elements

Transform optional chaining operators into a series of nil checks

Remove nullish coalescing operator

Compile export namespace to ES2015

For use with React PropTypes. Will error on any prop not explicitly specified.

Add a __source prop to all JSX Elements

Remove unnecessary React propTypes from the production build

Remove numeric separators from Decimal, Binary, Hex and Octal literals

This plugin transforms static class properties as well as properties declared with the property initializer syntax

Compile object rest and spread to ES5

Properly escape JSON for usage as an object literal inside of a `<script>` tag

Define a lazily evaluated property on an object

`Object.defineProperty`, but not IE 8's broken one.

`Object.getOwnPropertyDescriptor`, but accounts for IE's broken implementation.

Access deep object properties using a path

Undefined safe way of extracting object properties

A inter-process and inter-machine lockfile utility that works on a local or network file system

tiny util for getting and setting deep object props safely

Prevent defined property getters from throwing errors

Check if an object has a local property.

Like `extend` but only copies missing properties/values to the target object.

Reduces an object to a value that is the accumulated result of running each property in the object through a callback.