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app_vue/node_modules/eslint/lib/rules/no-global-assign.js

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+/**
+ * @fileoverview Rule to disallow assignments to native objects or read-only global variables
+ * @author Ilya Volodin
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        type: "suggestion",
+
+        docs: {
+            description: "disallow assignments to native objects or read-only global variables",
+            category: "Best Practices",
+            recommended: true,
+            url: "https://eslint.org/docs/rules/no-global-assign"
+        },
+
+        schema: [
+            {
+                type: "object",
+                properties: {
+                    exceptions: {
+                        type: "array",
+                        items: { type: "string" },
+                        uniqueItems: true
+                    }
+                },
+                additionalProperties: false
+            }
+        ],
+
+        messages: {
+            globalShouldNotBeModified: "Read-only global '{{name}}' should not be modified."
+        }
+    },
+
+    create(context) {
+        const config = context.options[0];
+        const exceptions = (config && config.exceptions) || [];
+
+        /**
+         * Reports write references.
+         * @param {Reference} reference A reference to check.
+         * @param {int} index The index of the reference in the references.
+         * @param {Reference[]} references The array that the reference belongs to.
+         * @returns {void}
+         */
+        function checkReference(reference, index, references) {
+            const identifier = reference.identifier;
+
+            if (reference.init === false &&
+                reference.isWrite() &&
+
+                /*
+                 * Destructuring assignments can have multiple default value,
+                 * so possibly there are multiple writeable references for the same identifier.
+                 */
+                (index === 0 || references[index - 1].identifier !== identifier)
+            ) {
+                context.report({
+                    node: identifier,
+                    messageId: "globalShouldNotBeModified",
+                    data: {
+                        name: identifier.name
+                    }
+                });
+            }
+        }
+
+        /**
+         * Reports write references if a given variable is read-only builtin.
+         * @param {Variable} variable A variable to check.
+         * @returns {void}
+         */
+        function checkVariable(variable) {
+            if (variable.writeable === false && exceptions.indexOf(variable.name) === -1) {
+                variable.references.forEach(checkReference);
+            }
+        }
+
+        return {
+            Program() {
+                const globalScope = context.getScope();
+
+                globalScope.variables.forEach(checkVariable);
+            }
+        };
+    }
+};