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Last change
on this file was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
Update repo after prototype presentation
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1 | /**
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2 | * @fileoverview Rule to flag when using constructor for wrapper objects
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3 | * @author Ilya Volodin
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4 | */
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5 |
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6 | "use strict";
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7 |
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8 | //------------------------------------------------------------------------------
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9 | // Requirements
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10 | //------------------------------------------------------------------------------
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11 |
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12 | const { getVariableByName } = require("./utils/ast-utils");
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13 |
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14 | //------------------------------------------------------------------------------
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15 | // Rule Definition
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16 | //------------------------------------------------------------------------------
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17 |
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18 | /** @type {import('../shared/types').Rule} */
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19 | module.exports = {
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20 | meta: {
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21 | type: "suggestion",
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22 |
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23 | docs: {
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24 | description: "Disallow `new` operators with the `String`, `Number`, and `Boolean` objects",
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25 | recommended: false,
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26 | url: "https://eslint.org/docs/latest/rules/no-new-wrappers"
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27 | },
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28 |
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29 | schema: [],
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30 |
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31 | messages: {
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32 | noConstructor: "Do not use {{fn}} as a constructor."
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33 | }
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34 | },
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35 |
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36 | create(context) {
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37 | const { sourceCode } = context;
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38 |
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39 | return {
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40 |
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41 | NewExpression(node) {
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42 | const wrapperObjects = ["String", "Number", "Boolean"];
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43 | const { name } = node.callee;
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44 |
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45 | if (wrapperObjects.includes(name)) {
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46 | const variable = getVariableByName(sourceCode.getScope(node), name);
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47 |
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48 | if (variable && variable.identifiers.length === 0) {
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49 | context.report({
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50 | node,
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51 | messageId: "noConstructor",
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52 | data: { fn: name }
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53 | });
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54 | }
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55 | }
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56 | }
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57 | };
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58 |
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59 | }
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60 | };
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