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4 |
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5 | "use strict";
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6 |
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10 |
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11 | module.exports = {
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12 | meta: {
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13 | docs: {
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14 | description: "disallow the use of `undefined` as an identifier",
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15 | category: "Variables",
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16 | recommended: false
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17 | },
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18 |
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19 | schema: []
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20 | },
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21 |
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22 | create(context) {
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23 |
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24 | return {
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25 |
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26 | Identifier(node) {
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27 | if (node.name === "undefined") {
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28 | const parent = context.getAncestors().pop();
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29 |
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30 | if (!parent || parent.type !== "MemberExpression" || node !== parent.property || parent.computed) {
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31 | context.report(node, "Unexpected use of undefined.");
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32 | }
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33 | }
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34 | }
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35 | };
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36 |
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37 | }
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38 | };
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