Patch: option scope might not be an object (#8789)

chartjs · Apr 2, 2021 · 98e890c · 98e890c
1 parent 8780e15
commit 98e890c
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Showing 3 changed files with 5 additions and 4 deletions.
diff --git a/package-lock.json b/package-lock.json
diff --git a/package.json b/package.json
@@ -2,7 +2,7 @@
   "name": "chart.js",
   "homepage": "https://www.chartjs.org",
   "description": "Simple HTML5 charts using the canvas element.",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "license": "MIT",
   "jsdelivr": "dist/chart.min.js",
   "unpkg": "dist/chart.min.js",

diff --git a/src/helpers/helpers.config.js b/src/helpers/helpers.config.js
@@ -276,9 +276,10 @@ function createSubResolver(parentScopes, resolver, prop, value) {
   const fallback = resolveFallback(resolver._fallback, prop, value);
   const allScopes = [...parentScopes, ...rootScopes];
   const set = new Set();
-  if (!(prop in parentScopes[0])) {
+  const firstParent = parentScopes[0];
+  if (isObject(firstParent) && !(prop in firstParent)) {
     // create an empty scope for possible stored values, so we always set the values in top scope.
-    set.add(parentScopes[0][prop] = {});
+    set.add(firstParent[prop] = {});
   }
   set.add(value);
   let key = addScopesFromKey(set, allScopes, prop, fallback || prop);