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no-new-wrappers.js 1.0KB

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  1. /**
  2. * @fileoverview Rule to flag when using constructor for wrapper objects
  3. * @author Ilya Volodin
  4. */
  5. "use strict";
  6. //------------------------------------------------------------------------------
  7. // Rule Definition
  8. //------------------------------------------------------------------------------
  9. module.exports = {
  10. meta: {
  11. type: "suggestion",
  12. docs: {
  13. description: "disallow `new` operators with the `String`, `Number`, and `Boolean` objects",
  14. category: "Best Practices",
  15. recommended: false,
  16. url: "https://eslint.org/docs/rules/no-new-wrappers"
  17. },
  18. schema: []
  19. },
  20. create(context) {
  21. return {
  22. NewExpression(node) {
  23. const wrapperObjects = ["String", "Number", "Boolean", "Math", "JSON"];
  24. if (wrapperObjects.indexOf(node.callee.name) > -1) {
  25. context.report({ node, message: "Do not use {{fn}} as a constructor.", data: { fn: node.callee.name } });
  26. }
  27. }
  28. };
  29. }
  30. };