Handle unset rdfDirection the same as null.

Author: davidlehn

Diff for: CHANGELOG.md

@@ -1,5 +1,10 @@
 # jsonld ChangeLog
 
+## 8.3.1 - 2023-09-xx
+
+### Fixed
+- Handle unset `rdfDirection` the same as `null`.
+
 ## 8.3.0 - 2023-09-06
 
 ### Added

Diff for: lib/toRdf.js

@@ -330,7 +330,7 @@ function _objectToRDF(
         'jsonld.InvalidRdfDirection',
         {value: rdfDirection});
     } else if('@language' in item) {
-      if('@direction' in item && rdfDirection === null) {
+      if('@direction' in item && !rdfDirection) {
         if(options.eventHandler) {
           // FIXME: only emit once?
           _handleEvent({
@@ -351,7 +351,7 @@ function _objectToRDF(
       object.datatype.value = datatype || RDF_LANGSTRING;
       object.language = item['@language'];
     } else {
-      if('@direction' in item && rdfDirection === null) {
+      if('@direction' in item && !rdfDirection) {
         if(options.eventHandler) {
           // FIXME: only emit once?
           _handleEvent({

Diff for: tests/misc.js

@@ -4101,6 +4101,22 @@ _:b0 <ex:p> "v" .
       });
     });
 
+    it('should handle no @lang, @dir, no rdfDirection', async () => {
+      const input = _json_dir_nl_d;
+      const nq = _nq_dir_nl_nd;
+
+      await _test({
+        type: 'toRDF',
+        input,
+        options: {skipExpansion: true},
+        expected: nq,
+        eventCodeLog: [
+          'rdfDirection not set'
+        ],
+        testNotSafe: true
+      });
+    });
+
     it('should handle no @lang, @dir, rdfDirection=null', async () => {
       const input = _json_dir_nl_d;
       const nq = _nq_dir_nl_nd;