60 lines
1.5 KiB
JavaScript
60 lines
1.5 KiB
JavaScript
/**
|
|
* @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 },
|
|
});
|
|
}
|
|
}
|
|
},
|
|
};
|
|
},
|
|
};
|