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/**
* @fileoverview Rule to flag when using constructor for wrapper objects
* @author Ilya Volodin
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const { getVariableByName } = require("./utils/ast-utils");
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
/** @type {import('../types').Rule.RuleModule} */
module.exports = {
meta: {
type: "suggestion",
docs: {
description:
"Disallow `new` operators with the `String`, `Number`, and `Boolean` objects",
recommended: false,
url: "https://eslint.org/docs/latest/rules/no-new-wrappers",
},
schema: [],
messages: {
noConstructor: "Do not use {{fn}} as a constructor.",
},
},
create(context) {
const { sourceCode } = context;
return {
NewExpression(node) {
const wrapperObjects = ["String", "Number", "Boolean"];
const { name } = node.callee;
if (wrapperObjects.includes(name)) {
const variable = getVariableByName(
sourceCode.getScope(node),
name,
);
if (variable && variable.identifiers.length === 0) {
context.report({
node,
messageId: "noConstructor",
data: { fn: name },
});
}
}
},
};
},
};