1 files changed, 13 insertions, 0 deletions
diff --git a/core/ops_builtin.rs b/core/ops_builtin.rs
index bd19b74f6..26ab4bed5 100644
--- a/core/ops_builtin.rs
+++ b/core/ops_builtin.rs
@@ -39,6 +39,7 @@ pub(crate) fn init_builtins() -> Extension {
       op_metrics::decl(),
       op_format_file_name::decl(),
       op_is_proxy::decl(),
+      op_str_byte_length::decl(),
     ])
     .ops(crate::ops_builtin_v8::init_builtins_v8())
     .build()
@@ -195,3 +196,15 @@ fn op_format_file_name(file_name: String) -> String {
 fn op_is_proxy(value: serde_v8::Value) -> bool {
   value.v8_value.is_proxy()
 }
+
+#[op(v8)]
+fn op_str_byte_length(
+  scope: &mut v8::HandleScope,
+  value: serde_v8::Value,
+) -> u32 {
+  if let Ok(string) = v8::Local::<v8::String>::try_from(value.v8_value) {
+    string.utf8_length(scope) as u32
+  } else {
+    0
+  }
+}