/** * @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('../types').Rule.RuleModule} */ module.exports = { meta: { type: 'problem', docs: { description: 'Disallow `new` operators with global non-constructor functions', recommended: true, 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 }, }); } }); } } }, }; }, };