fix(es/typescript): Handle backtick in ASI issue

crates/swc_fast_ts_strip/src/lib.rs

@@ -406,10 +406,12 @@ impl TsStrip {
             return;
         }
 
-        // Add a semicolon if the next token is `[`, `(`, `/`, `+`, or `-`
+        // https://tc39.es/ecma262/multipage/ecmascript-language-lexical-grammar.html#sec-asi-interesting-cases-in-statement-lists
+        // Add a semicolon if the next token is `[`, `(`, `/`, `+`, `-` or backtick.
         match token {
             Token::LParen
             | Token::LBracket
+            | Token::BackQuote
             | Token::BinOp(BinOpToken::Add | BinOpToken::Sub | BinOpToken::Div) => {
                 if prev_token == &Token::Semi {
                     self.add_overwrite(prev_span.lo, b';');
@@ -430,8 +432,8 @@ impl TsStrip {
         }
 
         if let TokenAndSpan {
-            // Only `([` affect ASI.
-            token: Token::LParen | Token::LBracket,
+            // Only `(`, `[` and backtick affect ASI.
+            token: Token::LParen | Token::LBracket | Token::BackQuote,
             had_line_break: true,
             ..
         } = &self.tokens[index + 1]

crates/swc_fast_ts_strip/tests/fixture/issue-9331.js

@@ -42,4 +42,12 @@ class foo {
 
 2
 ;              
-+ 3
++ 3
+
+
+f
+;                      
+`1`
+
+f ;     
+`1`

crates/swc_fast_ts_strip/tests/fixture/issue-9331.transform.js

@@ -21,4 +21,8 @@ class foo {
 }
 2;
 +3;
+f;
+`1`;
+f;
+`1`;
 export { };

crates/swc_fast_ts_strip/tests/fixture/issue-9331.ts

@@ -42,4 +42,12 @@ class foo {
 
 2
 export type { }
-+ 3
++ 3
+
+
+f
+declare namespace N { }
+`1`
+
+f as any
+`1`