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| /** | |
| * @fileoverview Rule to flag use of an object property of the global object (Math and JSON) as a function | |
| * @author James Allardice | |
| */ | |
| "use strict"; | |
| //------------------------------------------------------------------------------ | |
| // Requirements | |
| //------------------------------------------------------------------------------ | |
| const { CALL, ReferenceTracker } = require("eslint-utils"); | |
| //------------------------------------------------------------------------------ | |
| // Helpers | |
| //------------------------------------------------------------------------------ | |
| const nonCallableGlobals = ["Atomics", "JSON", "Math", "Reflect"]; | |
| //------------------------------------------------------------------------------ | |
| // Rule Definition | |
| //------------------------------------------------------------------------------ | |
| module.exports = { | |
| meta: { | |
| type: "problem", | |
| docs: { | |
| description: "disallow calling global object properties as functions", | |
| category: "Possible Errors", | |
| recommended: true, | |
| url: "https://eslint.org/docs/rules/no-obj-calls" | |
| }, | |
| schema: [], | |
| messages: { | |
| unexpectedCall: "'{{name}}' is not a function." | |
| } | |
| }, | |
| create(context) { | |
| return { | |
| Program() { | |
| const scope = context.getScope(); | |
| const tracker = new ReferenceTracker(scope); | |
| const traceMap = {}; | |
| for (const global of nonCallableGlobals) { | |
| traceMap[global] = { | |
| [CALL]: true | |
| }; | |
| } | |
| for (const { node } of tracker.iterateGlobalReferences(traceMap)) { | |
| context.report({ node, messageId: "unexpectedCall", data: { name: node.callee.name } }); | |
| } | |
| } | |
| }; | |
| } | |
| }; |