{ "presets": [ "@babel/react", ["@babel/env", { "useBuiltIns": "usage", "corejs": { "version": 3 } }] ], "plugins": ["angularjs-annotate"], // Target our current Node version in test environment, to transform and // polyfill only what's necessary "env": { "test": { "presets": [ "@babel/react", ["@babel/env", { "targets": {"node": "10.21"}, "useBuiltIns": "usage", "corejs": { "version": 3 } }] ] } } }