Add arg length check

kevinpschaaf · kevinpschaaf · commit 6139e8893a28 · 2019-02-13T18:16:52.000-08:00
diff --git a/lib/mixins/property-effects.js b/lib/mixins/property-effects.js
@@ -2226,7 +2226,7 @@ export const PropertyEffects = dedupingMixin(superClass => {
         }
         // When the `legacyUndefined` flag is enabled, pass a no-op value
         // so that the observer, computed property, or compound binding is aborted.
-        if (legacyUndefined && value === undefined) {
+        if (legacyUndefined && value === undefined && args.length > 1) {
           return NOOP;
         }
         values[i] = value;

Original file line number	Diff line number	Diff line change
`@@ -2226,7 +2226,7 @@ export const PropertyEffects = dedupingMixin(superClass => {`
`2226`	`2226`	`}`
`2227`	`2227`	// When the `legacyUndefined` flag is enabled, pass a no-op value
`2228`	`2228`	`// so that the observer, computed property, or compound binding is aborted.`
`2229`		`- if (legacyUndefined && value === undefined) {`
	`2229`	`+ if (legacyUndefined && value === undefined && args.length > 1) {`
`2230`	`2230`	`return NOOP;`
`2231`	`2231`	`}`
`2232`	`2232`	`values[i] = value;`