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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('../types').Rule.RuleModule} */
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",
});
}
});
}
},
};
},
};