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.babelrc 265B

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  1. {
  2. "plugins": [
  3. "@babel/plugin-proposal-optional-chaining"
  4. ],
  5. "presets": [
  6. ["@babel/preset-env", {
  7. "useBuiltIns": "usage",
  8. "corejs": 3,
  9. "targets": {
  10. "browsers": ["> 0.25%", "not ie 11", "not op_mini all"]
  11. }
  12. }]
  13. ]
  14. }