import { COMPILER_NAMES } from '../../shared/lib/constants';
export const edgeConditionName = 'edge-light';
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, preferEsm) {
    if (compilerType === COMPILER_NAMES.edgeServer) {
        return [
            'edge-light',
            '...'
        ];
    } 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];
}

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