ts-case-convert

import { objectToCamel, objectToSnake } from 'ts-case-convert'; const sourceObject = { user_id: 123, first_name: 'John', last_name: 'Doe', email_address: 'john.doe@example.com', is_active: true, created_at: new Date('2023-01-01T10:00:00Z'), addresses_list: [ { street_name: 'Main St', street_number: 123 }, { street_name: 'Oak Ave', street_number: 45 }, ], settings_map: { theme_color: 'blue', font_size: 16, }, null_value: null, undefined_value: undefined, }; // Convert keys to camelCase const camelCaseObject = objectToCamel(sourceObject); // Demonstrates type inference and access type UserIDType = typeof camelCaseObject.userId; // type is 'number' const userId: UserIDType = camelCaseObject.userId; console.log('CamelCase Object:', camelCaseObject); console.log('User ID:', userId); // Access property with camelCase // Convert keys back to snake_case const snakeCaseObject = objectToSnake(camelCaseObject); // Demonstrates type inference and access type FirstNameType = typeof snakeCaseObject.first_name; // type is 'string' const firstName: FirstNameType = snakeCaseObject.first_name; console.log('SnakeCase Object:', snakeCaseObject); console.log('First Name:', firstName); // Access property with snake_case // Example of nested access and type preservation const firstAddressCamel = camelCaseObject.addressesList[0]; type StreetNameCamel = typeof firstAddressCamel.streetName; // type is 'string' console.log('First address street name (camel):', firstAddressCamel.streetName); const firstAddressSnake = snakeCaseObject.addresses_list[0]; type StreetNameSnake = typeof firstAddressSnake.street_name; // type is 'string' console.log('First address street name (snake):', firstAddressSnake.street_name);