fix: no-loss-of-precision false positive with uppercase exponent (#20032)

sethamus · web-flow · commit ea789c7dd234 · 2025-08-23T17:55:24.000+05:30
diff --git a/lib/rules/no-loss-of-precision.js b/lib/rules/no-loss-of-precision.js
@@ -189,7 +189,7 @@ module.exports = {
 		 * @returns {boolean} true if they do not match
 		 */
 		function baseTenLosesPrecision(node) {
-			const rawNumber = getRaw(node);
+			const rawNumber = getRaw(node).toLowerCase();
 
 			/*
 			 * If trailing zeros equal the exponent, this is a valid representation
diff --git a/tests/lib/rules/no-loss-of-precision.js b/tests/lib/rules/no-loss-of-precision.js
@@ -52,6 +52,9 @@ ruleTester.run("no-loss-of-precision", rule, {
 		"var x = 9.00e2",
 		"var x = 9.000e3",
 		"var x = 9.0000000000e10",
+		"var x = 9.00E2",
+		"var x = 9.000E3",
+		"var x = 9.0000000000E10",
 		"var x = 019.5",
 		"var x = 0195",
 		"var x = 0e5",
