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-rw-r--r--ext/mixed/js/util.js15
1 files changed, 10 insertions, 5 deletions
diff --git a/ext/mixed/js/util.js b/ext/mixed/js/util.js
index eae54f49..62838674 100644
--- a/ext/mixed/js/util.js
+++ b/ext/mixed/js/util.js
@@ -22,12 +22,17 @@
*/
function clozeBuild(sentence, source) {
- return {
- sentence: sentence.text.trim(),
- prefix: sentence.text.substring(0, sentence.offset).trim(),
- body: source.trim(),
- suffix: sentence.text.substring(sentence.offset + source.length).trim()
+ const result = {
+ sentence: sentence.text.trim()
};
+
+ if (source) {
+ result.prefix = sentence.text.substring(0, sentence.offset).trim();
+ result.body = source.trim();
+ result.suffix = sentence.text.substring(sentence.offset + source.length).trim();
+ }
+
+ return result;
}