Avoid breaking toJSON with empty symbols

5 years ago · 8c55d0e07d
1 changed files with 3 additions and 1 deletions
--- a/src/dom_components/model/Component.js
+++ b/src/dom_components/model/Component.js
@ -1479,7 +1479,9 @@ const Component = Backbone.Model.extend(Styleable).extend(
        const symbol = obj[keySymbol];
        const symbols = obj[keySymbols];
        if (symbols && isArray(symbols)) {
-          obj[keySymbols] = symbols.map(i => (i.getId ? i.getId() : i));
+          obj[keySymbols] = symbols
+            .filter(i => i)
+            .map(i => (i.getId ? i.getId() : i));
        }
        if (symbol && !isString(symbol)) {
          obj[keySymbol] = symbol.getId();