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5 |
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6 | "use strict";
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7 |
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11 |
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12 | module.exports = {
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13 | meta: {
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14 | type: "problem",
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15 |
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16 | docs: {
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17 | description: "disallow `new` operators with the `Symbol` object",
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18 | category: "ECMAScript 6",
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19 | recommended: true,
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20 | url: "https://eslint.org/docs/rules/no-new-symbol"
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21 | },
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22 |
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23 | schema: [],
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24 |
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25 | messages: {
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26 | noNewSymbol: "`Symbol` cannot be called as a constructor."
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27 | }
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28 | },
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29 |
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30 | create(context) {
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31 |
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32 | return {
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33 | "Program:exit"() {
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34 | const globalScope = context.getScope();
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35 | const variable = globalScope.set.get("Symbol");
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36 |
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37 | if (variable && variable.defs.length === 0) {
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38 | variable.references.forEach(ref => {
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39 | const node = ref.identifier;
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40 | const parent = node.parent;
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41 |
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42 | if (parent && parent.type === "NewExpression" && parent.callee === node) {
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43 | context.report({
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44 | node,
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45 | messageId: "noNewSymbol"
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46 | });
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47 | }
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48 | });
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49 | }
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50 | }
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51 | };
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52 |
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53 | }
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54 | };
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