/** * @fileoverview Rule to disallow use of the new operator with global non-constructor functions * @author Sosuke Suzuki */ "use strict"; //------------------------------------------------------------------------------ // Helpers //------------------------------------------------------------------------------ const nonConstructorGlobalFunctionNames = ["Symbol", "BigInt"]; //------------------------------------------------------------------------------ // Rule Definition //------------------------------------------------------------------------------ /** @type {import('../shared/types').Rule} */ module.exports = { meta: { type: "problem", docs: { description: "Disallow `new` operators with global non-constructor functions", recommended: false, url: "https://eslint.org/docs/latest/rules/no-new-native-nonconstructor" }, schema: [], messages: { noNewNonconstructor: "`{{name}}` cannot be called as a constructor." } }, create(context) { const sourceCode = context.sourceCode; return { "Program:exit"(node) { const globalScope = sourceCode.getScope(node); for (const nonConstructorName of nonConstructorGlobalFunctionNames) { const variable = globalScope.set.get(nonConstructorName); if (variable && variable.defs.length === 0) { variable.references.forEach(ref => { const idNode = ref.identifier; const parent = idNode.parent; if (parent && parent.type === "NewExpression" && parent.callee === idNode) { context.report({ node: idNode, messageId: "noNewNonconstructor", data: { name: nonConstructorName } }); } }); } } } }; } };