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| /** | |
| * @fileoverview Rule to disallow use of the new operator with the `Symbol` object | |
| * @author Alberto Rodríguez | |
| */ | |
| "use strict"; | |
| //------------------------------------------------------------------------------ | |
| // Rule Definition | |
| //------------------------------------------------------------------------------ | |
| module.exports = { | |
| meta: { | |
| type: "problem", | |
| docs: { | |
| description: "disallow `new` operators with the `Symbol` object", | |
| category: "ECMAScript 6", | |
| recommended: true, | |
| url: "https://eslint.org/docs/rules/no-new-symbol" | |
| }, | |
| schema: [] | |
| }, | |
| create(context) { | |
| return { | |
| "Program:exit"() { | |
| const globalScope = context.getScope(); | |
| const variable = globalScope.set.get("Symbol"); | |
| if (variable && variable.defs.length === 0) { | |
| variable.references.forEach(ref => { | |
| const node = ref.identifier; | |
| if (node.parent && node.parent.type === "NewExpression") { | |
| context.report({ node, message: "`Symbol` cannot be called as a constructor." }); | |
| } | |
| }); | |
| } | |
| } | |
| }; | |
| } | |
| }; |