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app_vue/node_modules/eslint/lib/rules/no-implied-eval.js

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+/**
+ * @fileoverview Rule to flag use of implied eval via setTimeout and setInterval
+ * @author James Allardice
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const astUtils = require("./utils/ast-utils");
+const { getStaticValue } = require("eslint-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        type: "suggestion",
+
+        docs: {
+            description: "disallow the use of `eval()`-like methods",
+            category: "Best Practices",
+            recommended: false,
+            url: "https://eslint.org/docs/rules/no-implied-eval"
+        },
+
+        schema: [],
+
+        messages: {
+            impliedEval: "Implied eval. Consider passing a function instead of a string."
+        }
+    },
+
+    create(context) {
+        const GLOBAL_CANDIDATES = Object.freeze(["global", "window", "globalThis"]);
+        const EVAL_LIKE_FUNC_PATTERN = /^(?:set(?:Interval|Timeout)|execScript)$/u;
+
+        /**
+         * Checks whether a node is evaluated as a string or not.
+         * @param {ASTNode} node A node to check.
+         * @returns {boolean} True if the node is evaluated as a string.
+         */
+        function isEvaluatedString(node) {
+            if (
+                (node.type === "Literal" && typeof node.value === "string") ||
+                node.type === "TemplateLiteral"
+            ) {
+                return true;
+            }
+            if (node.type === "BinaryExpression" && node.operator === "+") {
+                return isEvaluatedString(node.left) || isEvaluatedString(node.right);
+            }
+            return false;
+        }
+
+        /**
+         * Reports if the `CallExpression` node has evaluated argument.
+         * @param {ASTNode} node A CallExpression to check.
+         * @returns {void}
+         */
+        function reportImpliedEvalCallExpression(node) {
+            const [firstArgument] = node.arguments;
+
+            if (firstArgument) {
+
+                const staticValue = getStaticValue(firstArgument, context.getScope());
+                const isStaticString = staticValue && typeof staticValue.value === "string";
+                const isString = isStaticString || isEvaluatedString(firstArgument);
+
+                if (isString) {
+                    context.report({
+                        node,
+                        messageId: "impliedEval"
+                    });
+                }
+            }
+
+        }
+
+        /**
+         * Reports calls of `implied eval` via the global references.
+         * @param {Variable} globalVar A global variable to check.
+         * @returns {void}
+         */
+        function reportImpliedEvalViaGlobal(globalVar) {
+            const { references, name } = globalVar;
+
+            references.forEach(ref => {
+                const identifier = ref.identifier;
+                let node = identifier.parent;
+
+                while (astUtils.isSpecificMemberAccess(node, null, name)) {
+                    node = node.parent;
+                }
+
+                if (astUtils.isSpecificMemberAccess(node, null, EVAL_LIKE_FUNC_PATTERN)) {
+                    const calleeNode = node.parent.type === "ChainExpression" ? node.parent : node;
+                    const parent = calleeNode.parent;
+
+                    if (parent.type === "CallExpression" && parent.callee === calleeNode) {
+                        reportImpliedEvalCallExpression(parent);
+                    }
+                }
+            });
+        }
+
+        //--------------------------------------------------------------------------
+        // Public
+        //--------------------------------------------------------------------------
+
+        return {
+            CallExpression(node) {
+                if (astUtils.isSpecificId(node.callee, EVAL_LIKE_FUNC_PATTERN)) {
+                    reportImpliedEvalCallExpression(node);
+                }
+            },
+            "Program:exit"() {
+                const globalScope = context.getScope();
+
+                GLOBAL_CANDIDATES
+                    .map(candidate => astUtils.getVariableByName(globalScope, candidate))
+                    .filter(globalVar => !!globalVar && globalVar.defs.length === 0)
+                    .forEach(reportImpliedEvalViaGlobal);
+            }
+        };
+
+    }
+};