Enable unicorn/prefer-number-is-safe-integer rule (#19368)

eslint.config.js

@@ -326,7 +326,6 @@ const configs = [
       "unicorn/no-declarations-before-early-exit": "off",
       "unicorn/no-negated-comparison": "off",
       "unicorn/prefer-early-return": "off",
-      "unicorn/prefer-number-is-safe-integer": "off",
       "unicorn/no-undeclared-class-members": "off",
       "unicorn/no-useless-boolean-cast": "off",
       "unicorn/no-useless-fallback-in-spread": "off",

scripts/prepare-test-for-legacy-nodejs.js

@@ -6,7 +6,7 @@ const packageJson = JSON.parse(fs.readFileSync(packageJsonFile));
 const argv = process.argv.slice(2);
 const nodeVersion = Number(argv[1]);
 
-if (argv[0] !== "--node-version" || !Number.isInteger(nodeVersion)) {
+if (argv[0] !== "--node-version" || !Number.isSafeInteger(nodeVersion)) {
   throw new Error("Expect `--node-version` argument.");
 }
 

src/language-handlebars/parser-glimmer.js

@@ -34,7 +34,7 @@ function addBackslash(node) {
   }
 }
 
-const isIndex = (value) => Number.isInteger(value) && value >= 0;
+const isIndex = (value) => Number.isSafeInteger(value) && value >= 0;
 // Add `offset` to `loc.{start,end}`
 const setOffset = (node) => {
   const { start, end } = node.loc;

src/language-js/location/is-index.js

@@ -1,3 +1,3 @@
-const isIndex = (value) => Number.isInteger(value) && value >= 0;
+const isIndex = (value) => Number.isSafeInteger(value) && value >= 0;
 
 export { isIndex };