fix: template string compare issue

webpack · Apr 27, 2023 · 6aacf77 · 6aacf77
1 parent 3f9dc03
commit 6aacf77
Showing 1 changed file with 7 additions and 5 deletions.
diff --git a/lib/javascript/JavascriptParser.js b/lib/javascript/JavascriptParser.js
@@ -545,11 +545,13 @@ class JavascriptParser extends Parser {
 					const rightSuffix = getSuffix(right.parts);
 					const lenPrefix = Math.min(leftPrefix.length, rightPrefix.length);
 					const lenSuffix = Math.min(leftSuffix.length, rightSuffix.length);
-					if (
-						leftPrefix.slice(0, lenPrefix) !==
-							rightPrefix.slice(0, lenPrefix) ||
-						leftSuffix.slice(-lenSuffix) !== rightSuffix.slice(-lenSuffix)
-					) {
+					const prefixMismatch =
+						lenPrefix > 0 &&
+						leftPrefix.slice(0, lenPrefix) !== rightPrefix.slice(0, lenPrefix);
+					const suffixMismatch =
+						lenSuffix > 0 &&
+						leftSuffix.slice(-lenSuffix) !== rightSuffix.slice(-lenSuffix);
+					if (prefixMismatch || suffixMismatch) {
 						return res
 							.setBoolean(!eql)
 							.setSideEffects(