fixup: cleanup

Author: ronag

lib/_http_outgoing.js

@@ -876,19 +876,20 @@ function write_(msg, chunk, encoding, callback, fromEnd) {
     return false;
   }
 
-  let len = msg.strictContentLength ?
-    typeof chunk === 'string' ? Buffer.byteLength(chunk, encoding) : chunk.byteLength : null;
+  let len;
 
-  if (len != null) {
-    if (
-      strictContentLength(msg) &&
-      (fromEnd ? msg[kBytesWritten] + len !== msg._contentLength : msg[kBytesWritten] + len > msg._contentLength)
-    ) {
-      throw new ERR_HTTP_CONTENT_LENGTH_MISMATCH(len + msg[kBytesWritten], msg._contentLength);
-    }
+  if (msg.strictContentLength) {
+    len ??= typeof chunk === 'string' ? Buffer.byteLength(chunk, encoding) : chunk.byteLength;
     msg[kBytesWritten] += len;
   }
 
+  if (
+    strictContentLength(msg) &&
+    (fromEnd ? msg[kBytesWritten] + len !== msg._contentLength : msg[kBytesWritten] + len > msg._contentLength)
+  ) {
+    throw new ERR_HTTP_CONTENT_LENGTH_MISMATCH(len + msg[kBytesWritten], msg._contentLength);
+  }
+
   if (!msg._header) {
     if (fromEnd) {
       len ??= typeof chunk === 'string' ? Buffer.byteLength(chunk, encoding) : chunk.byteLength;