Remove useless u flags in regular expressions (#18509)

website/playground/VersionLink.jsx

@@ -1,11 +1,11 @@
 import { Teleport } from "vue";
 
 export default function VersionLink({ version }) {
-  const match = version.match(/^pr-(\d+)$/u);
+  const match = version.match(/^pr-(\d+)$/);
   let href;
   if (match) {
     href = `pull/${match[1]}`;
-  } else if (/\.0$/u.test(version)) {
+  } else if (/\.0$/.test(version)) {
     href = `releases/tag/${version}`;
   } else {
     href = `blob/main/CHANGELOG.md#${version.replaceAll(".", "")}`;

website/playground/dummyId.js

@@ -48,7 +48,7 @@ function getRandomElement(array) {
 }
 
 function camelCase(string) {
-  return string.replaceAll(/_(\w)/gu, (_, c) => c.toUpperCase());
+  return string.replaceAll(/_(\w)/g, (_, c) => c.toUpperCase());
 }
 
 export default function generateDummyId() {

website/playground/index.jsx

@@ -123,7 +123,7 @@ function augmentOption(option) {
   option.cliName =
     "--" +
     (option.inverted ? "no-" : "") +
-    option.name.replaceAll(/(?<=[a-z])(?=[A-Z])/gu, "-").toLowerCase();
+    option.name.replaceAll(/(?<=[a-z])(?=[A-Z])/g, "-").toLowerCase();
 
   return option;
 }

website/playground/markdown.js

@@ -71,7 +71,7 @@ function formatCLIOptions(cliOptions) {
 }
 
 function codeBlock(content, syntax) {
-  const backtickSequences = content.match(/`+/gu) || [];
+  const backtickSequences = content.match(/`+/g) || [];
   const longestBacktickSequenceLength = Math.max(
     ...backtickSequences.map(({ length }) => length),
   );

website/playground/utilities.js

@@ -1,5 +1,5 @@
 export function fixPrettierVersion(version) {
-  const match = version.match(/^\d+\.\d+\.\d+-pr.(\d+)$/u);
+  const match = version.match(/^\d+\.\d+\.\d+-pr.(\d+)$/);
   if (match) {
     return `pr-${match[1]}`;
   }
@@ -53,13 +53,13 @@ export function getCodemirrorMode(parser) {
 }
 
 const astAutoFold = {
-  estree: /^\s*"(loc|start|end|tokens|\w+Comments|comments)":/u,
-  postcss: /^\s*"(source|input|raws|file)":/u,
-  html: /^\s*"(\w+Span|valueTokens|tokens|file|tagDefinition)":/u,
-  mdast: /^\s*"position":/u,
-  yaml: /^\s*"position":/u,
-  glimmer: /^\s*"loc":/u,
-  graphql: /^\s*"loc":/u,
+  estree: /^\s*"(loc|start|end|tokens|\w+Comments|comments)":/,
+  postcss: /^\s*"(source|input|raws|file)":/,
+  html: /^\s*"(\w+Span|valueTokens|tokens|file|tagDefinition)":/,
+  mdast: /^\s*"position":/,
+  yaml: /^\s*"position":/,
+  glimmer: /^\s*"loc":/,
+  graphql: /^\s*"loc":/,
 };
 
 export function getAstAutoFold(parser) {