bff6298578
* Replace lodash 'values' usage with Object.keys => .map(obj[key]) * Block scoping: refactor letReferences, outsideLetReferences as objects of type Map * Remove lodash dependency from babel-plugin-transform-block-scoping * Fixup: Add missing Object.keys call * Fixup: Update remaining property accessors * Coerce Map.values() iterator results into an array via spread operator * Fixup: Map.put -> Map.set * Fixup: undo incorrect variable de-duplication * Replace array-spread-plus-map combination with Array.from call * Extract an extendMap function as an attempt to create an optimization boundary * Experiment: cast objects to string (eliminates one Map/object difference per https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map ) * Fixup: perform String cast on map keys, not values * Revert "Fixup: perform String cast on map keys, not values" This reverts commit abdd147438fa74f51ac50ef1f96bb462810cd3f2. * Revert "Experiment: cast objects to string (eliminates one Map/object difference per https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map )" This reverts commit a4035c885b37bfd6e926a0362bda9dcf5b5a52c2. * Experiment: filter keys via Object.prototype.hasOwnProperty.call * Revert "Experiment: filter keys via Object.prototype.hasOwnProperty.call" This reverts commit 491c093f213c6229815b2e6dc9243245376265b0. * Migrate back from Map-based reference storage to Object-based storage; access performance appears much improved for Object property access * Revert "Migrate back from Map-based reference storage to Object-based storage; access performance appears much improved for Object property access" This reverts commit 2119acc7f0d78ced3b9ad77820b4b72e5ad67475. * Iterate over a clone of outsideRefs keys * Revert "Extract an extendMap function as an attempt to create an optimization boundary" This reverts commit 85689f2bfc180d0b5c0e674e5de7954470c7ec69. * Fixup: migrate remaining Object property access to Map.get in tdz module
@babel/plugin-transform-block-scoping
Compile ES2015 block scoping (const and let) to ES5
See our website @babel/plugin-transform-block-scoping for more information.
Install
Using npm:
npm install --save-dev @babel/plugin-transform-block-scoping
or using yarn:
yarn add @babel/plugin-transform-block-scoping --dev