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