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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 |
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10 |
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11 |
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12 | const {
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13 | CALL,
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14 | CONSTRUCT,
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15 | ReferenceTracker,
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16 | getStringIfConstant
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17 | } = require("eslint-utils");
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18 |
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19 |
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20 |
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21 |
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22 |
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23 | module.exports = {
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24 | meta: {
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25 | type: "suggestion",
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26 |
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27 | docs: {
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28 | description: "enforce the use of `u` flag on RegExp",
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29 | category: "Best Practices",
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30 | recommended: false,
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31 | url: "https://eslint.org/docs/rules/require-unicode-regexp"
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32 | },
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33 |
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34 | messages: {
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35 | requireUFlag: "Use the 'u' flag."
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36 | },
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37 |
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38 | schema: []
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39 | },
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40 |
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41 | create(context) {
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42 | return {
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43 | "Literal[regex]"(node) {
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44 | const flags = node.regex.flags || "";
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45 |
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46 | if (!flags.includes("u")) {
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47 | context.report({ node, messageId: "requireUFlag" });
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48 | }
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49 | },
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50 |
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51 | Program() {
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52 | const scope = context.getScope();
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53 | const tracker = new ReferenceTracker(scope);
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54 | const trackMap = {
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55 | RegExp: { [CALL]: true, [CONSTRUCT]: true }
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56 | };
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57 |
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58 | for (const { node } of tracker.iterateGlobalReferences(trackMap)) {
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59 | const flagsNode = node.arguments[1];
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60 | const flags = getStringIfConstant(flagsNode, scope);
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61 |
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62 | if (!flagsNode || (typeof flags === "string" && !flags.includes("u"))) {
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63 | context.report({ node, messageId: "requireUFlag" });
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64 | }
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65 | }
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66 | }
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67 | };
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68 | }
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69 | };
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