const coreJSVersion = require('./node_modules/core-js/package.json').version; let presets = [ [ '@babel/preset-env', { useBuiltIns: 'usage', corejs: { version: coreJSVersion, proposals: true }, modules: false, }, ], ]; // include stage 3 proposals const plugins = [ '@babel/plugin-proposal-class-properties', '@babel/plugin-proposal-json-strings', '@babel/plugin-proposal-private-methods', // See: https://gitlab.com/gitlab-org/gitlab/-/issues/229146 '@babel/plugin-transform-arrow-functions', // See: https://gitlab.com/gitlab-org/gitlab/-/issues/336216 '@babel/plugin-proposal-optional-chaining', // See: https://gitlab.com/gitlab-org/gitlab/-/issues/336216 '@babel/plugin-proposal-nullish-coalescing-operator', 'lodash', ]; // Jest is running in node environment const isJest = Boolean(process.env.JEST_WORKER_ID); if (isJest) { presets = [ [ '@babel/preset-env', { targets: { node: 'current', }, }, ], ]; } module.exports = { presets, plugins, sourceType: 'unambiguous' };