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- /**
- * @fileoverview Rule to enforce the use of `u` flag on RegExp.
- * @author Toru Nagashima
- */
- "use strict";
- //------------------------------------------------------------------------------
- // Requirements
- //------------------------------------------------------------------------------
- const {
- CALL,
- CONSTRUCT,
- ReferenceTracker,
- getStringIfConstant
- } = require("eslint-utils");
- //------------------------------------------------------------------------------
- // Rule Definition
- //------------------------------------------------------------------------------
- module.exports = {
- meta: {
- type: "suggestion",
- docs: {
- description: "enforce the use of `u` flag on RegExp",
- category: "Best Practices",
- recommended: false,
- url: "https://eslint.org/docs/rules/require-unicode-regexp"
- },
- messages: {
- requireUFlag: "Use the 'u' flag."
- },
- schema: []
- },
- create(context) {
- return {
- "Literal[regex]"(node) {
- const flags = node.regex.flags || "";
- if (!flags.includes("u")) {
- context.report({ node, messageId: "requireUFlag" });
- }
- },
- Program() {
- const scope = context.getScope();
- const tracker = new ReferenceTracker(scope);
- const trackMap = {
- RegExp: { [CALL]: true, [CONSTRUCT]: true }
- };
- for (const { node } of tracker.iterateGlobalReferences(trackMap)) {
- const flagsNode = node.arguments[1];
- const flags = getStringIfConstant(flagsNode, scope);
- if (!flagsNode || (typeof flags === "string" && !flags.includes("u"))) {
- context.report({ node, messageId: "requireUFlag" });
- }
- }
- }
- };
- }
- };
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