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babel.config.js
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babel.config.js
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const CONFIG = {
default: {
plugins: [
['@babel/plugin-transform-typescript', {
allowDeclareFields: true
}],
['@babel/plugin-proposal-class-properties', {
loose: true
}],
],
},
es6: {
plugins: [
['@babel/plugin-proposal-object-rest-spread', {
loose: true,
useBuiltIns: true
}]
]
},
es5: {
presets: [
['@babel/preset-env', {
modules: false,
loose: true,
targets: {
browsers: ['last 3 versions']
}
}],
],
},
};
function config(name) {
if (name === 'default' || !CONFIG[name]) {
return CONFIG.default;
}
const { presets = [], plugins = [] } = CONFIG[name];
return {
presets: presets.concat(CONFIG.default.presets || []),
plugins: plugins.concat(CONFIG.default.plugins || []),
};
}
module.exports = (api) => {
let format;
api.caller(caller => format = caller.output || process.env.NODE_ENV);
api.cache.using(() => format);
return config(format);
};