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/** * @fileoverview Rule to flag when using new Function * @author Ilya Volodin */ "use strict"; //------------------------------------------------------------------------------ // Requirements //------------------------------------------------------------------------------ const astUtils = require("./utils/ast-utils"); //------------------------------------------------------------------------------ // Helpers //------------------------------------------------------------------------------ const callMethods = new Set(["apply", "bind", "call"]); //------------------------------------------------------------------------------ // Rule Definition //------------------------------------------------------------------------------ /** @type {import('../shared/types').Rule} */ module.exports = { meta: { type: "suggestion", docs: { description: "Disallow `new` operators with the `Function` object", recommended: false, url: "https://eslint.org/docs/latest/rules/no-new-func" }, schema: [], messages: { noFunctionConstructor: "The Function constructor is eval." } }, create(context) { const sourceCode = context.sourceCode; return { "Program:exit"(node) { const globalScope = sourceCode.getScope(node); const variable = globalScope.set.get("Function"); if (variable && variable.defs.length === 0) { variable.references.forEach(ref => { const idNode = ref.identifier; const { parent } = idNode; let evalNode; if (parent) { if (idNode === parent.callee && ( parent.type === "NewExpression" || parent.type === "CallExpression" )) { evalNode = parent; } else if ( parent.type === "MemberExpression" && idNode === parent.object && callMethods.has(astUtils.getStaticPropertyName(parent)) ) { const maybeCallee = parent.parent.type === "ChainExpression" ? parent.parent : parent; if (maybeCallee.parent.type === "CallExpression" && maybeCallee.parent.callee === maybeCallee) { evalNode = maybeCallee.parent; } } } if (evalNode) { context.report({ node: evalNode, messageId: "noFunctionConstructor" }); } }); } } }; } };