100 lines
2.4 KiB
JavaScript
100 lines
2.4 KiB
JavaScript
/**
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* @fileoverview Rule to flag use of an object property of the global object (Math and JSON) as a function
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* @author James Allardice
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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 {
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CALL,
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CONSTRUCT,
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ReferenceTracker,
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} = require("@eslint-community/eslint-utils");
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const getPropertyName = require("./utils/ast-utils").getStaticPropertyName;
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//------------------------------------------------------------------------------
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// Helpers
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//------------------------------------------------------------------------------
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const nonCallableGlobals = ["Atomics", "JSON", "Math", "Reflect", "Intl"];
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/**
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* Returns the name of the node to report
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* @param {ASTNode} node A node to report
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* @returns {string} name to report
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*/
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function getReportNodeName(node) {
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if (node.type === "ChainExpression") {
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return getReportNodeName(node.expression);
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}
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if (node.type === "MemberExpression") {
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return getPropertyName(node);
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}
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return node.name;
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}
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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/** @type {import('../types').Rule.RuleModule} */
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module.exports = {
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meta: {
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type: "problem",
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docs: {
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description:
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"Disallow calling global object properties as functions",
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recommended: true,
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url: "https://eslint.org/docs/latest/rules/no-obj-calls",
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},
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schema: [],
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messages: {
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unexpectedCall: "'{{name}}' is not a function.",
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unexpectedRefCall:
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"'{{name}}' is reference to '{{ref}}', which is not a function.",
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},
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},
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create(context) {
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const sourceCode = context.sourceCode;
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return {
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Program(node) {
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const scope = sourceCode.getScope(node);
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const tracker = new ReferenceTracker(scope);
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const traceMap = {};
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for (const g of nonCallableGlobals) {
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traceMap[g] = {
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[CALL]: true,
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[CONSTRUCT]: true,
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};
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}
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for (const {
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node: refNode,
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path,
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} of tracker.iterateGlobalReferences(traceMap)) {
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const name = getReportNodeName(refNode.callee);
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const ref = path[0];
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const messageId =
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name === ref ? "unexpectedCall" : "unexpectedRefCall";
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context.report({
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node: refNode,
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messageId,
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data: { name, ref },
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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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