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Editing: esnext.reflect.delete-metadata.js
var $ = require('../internals/export'); var ReflectMetadataModule = require('../internals/reflect-metadata'); var anObject = require('../internals/an-object'); var toMetadataKey = ReflectMetadataModule.toKey; var getOrCreateMetadataMap = ReflectMetadataModule.getMap; var store = ReflectMetadataModule.store; // `Reflect.deleteMetadata` method // https://github.com/rbuckton/reflect-metadata $({ target: 'Reflect', stat: true }, { deleteMetadata: function deleteMetadata(metadataKey, target /* , targetKey */) { var targetKey = arguments.length < 3 ? undefined : toMetadataKey(arguments[2]); var metadataMap = getOrCreateMetadataMap(anObject(target), targetKey, false); if (metadataMap === undefined || !metadataMap['delete'](metadataKey)) return false; if (metadataMap.size) return true; var targetMetadata = store.get(target); targetMetadata['delete'](targetKey); return !!targetMetadata.size || store['delete'](target); } });
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