fix(es): Allow extra comments after sourceMappingURL (#7262)

Author: limerickgds

crates/swc/src/lib.rs

@@ -309,7 +309,15 @@ impl Compiler {
             let read_sourcemap = || -> Result<Option<sourcemap::SourceMap>, Error> {
                 let s = "sourceMappingURL=";
                 let idx = fm.src.rfind(s);
-                let data_url = idx.map(|idx| &fm.src[idx + s.len()..]);
+
+                let data_url = idx.map(|idx| {
+                    let data_idx = idx + s.len();
+                    if let Some(end) = fm.src[data_idx..].find('\n').map(|i| i + data_idx + 1) {
+                        &fm.src[data_idx..end]
+                    } else {
+                        &fm.src[data_idx..]
+                    }
+                });
 
                 match read_inline_sourcemap(data_url) {
                     Ok(r) => Ok(r),

crates/swc/tests/source_map.rs

@@ -74,6 +74,11 @@ fn case_inline() {
     inline("tests/srcmap/case-inline/index.js");
 }
 
+#[test]
+fn case_inline_extra_content() {
+    inline("tests/srcmap/case-inline-extra-content/index.js");
+}
+
 #[test]
 fn issue_622() {
     file("tests/srcmap/issue-622/index.js", Default::default()).unwrap();

crates/swc/tests/srcmap/case-inline-extra-content/.swcrc

@@ -0,0 +1,3 @@
+{
+    "inputSourceMap": true,
+}