/** * @fileoverview Rule to flag when using constructor for wrapper objects * @author Ilya Volodin */ "use strict"; //------------------------------------------------------------------------------ // Rule Definition //------------------------------------------------------------------------------ module.exports = { meta: { type: "suggestion", docs: { description: "disallow `new` operators with the `String`, `Number`, and `Boolean` objects", category: "Best Practices", recommended: false, url: "https://eslint.org/docs/rules/no-new-wrappers" }, schema: [] }, create(context) { return { NewExpression(node) { const wrapperObjects = ["String", "Number", "Boolean", "Math", "JSON"]; if (wrapperObjects.indexOf(node.callee.name) > -1) { context.report({ node, message: "Do not use {{fn}} as a constructor.", data: { fn: node.callee.name } }); } } }; } };