| import { | |
| COMPILER_NAMES, | |
| type CompilerNameValues, | |
| } from '../../shared/lib/constants' | |
| // exports.<conditionName> | |
| export const edgeConditionNames = [ | |
| 'edge-light', | |
| // inherits the default conditions | |
| '...', | |
| ] | |
| const mainFieldsPerCompiler = { | |
| // For default case, prefer CJS over ESM on server side. e.g. pages dir SSR | |
| [COMPILER_NAMES.server]: ['main', 'module'], | |
| [COMPILER_NAMES.client]: ['browser', 'module', 'main'], | |
| // For bundling-all strategy, prefer ESM over CJS | |
| 'server-esm': ['module', 'main'], | |
| } | |
| export function getMainField( | |
| compilerType: CompilerNameValues, | |
| preferEsm: boolean | |
| ) { | |
| if (compilerType === COMPILER_NAMES.edgeServer) { | |
| return edgeConditionNames | |
| } else if (compilerType === COMPILER_NAMES.client) { | |
| return mainFieldsPerCompiler[COMPILER_NAMES.client] | |
| } | |
| // Prefer module fields over main fields for isomorphic packages on server layer | |
| return preferEsm | |
| ? mainFieldsPerCompiler['server-esm'] | |
| : mainFieldsPerCompiler[COMPILER_NAMES.server] | |
| } | |