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custom-field-maker
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babel.config.mjs
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babel.config.mjs
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export default {
presets: [
[
'@babel/preset-env',
{
targets: { ie: '11' }, // Babel 8でtargets省略時は"defaults"相当になるため、従来のES5出力を維持するために明示
modules: 'commonjs', // package.jsonがCommonJS想定(mainフィールド)のため明示
},
],
[
'@babel/preset-react',
// development: 未指定だとBABEL_ENV/NODE_ENVの実行時環境変数で自動判定されるため、
// 実行環境によってlib/にjsx-dev-runtime(jsxDEV)呼び出しが紛れ込むことがある。
// React 19の本番ビルドはjsxDEVを未定義にするため、配布物のlib/は常に本番用のjsx-runtimeを使う。
{ runtime: 'automatic', development: false },
], // React 17+の新しいJSX変換を有効化
'@babel/preset-typescript',
],
plugins: ['@babel/plugin-transform-runtime'],
};
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