[Core] Checkbox: fix indeterminate state update (#3409)

Fixes #3408
palantir · Mar 12, 2019 · d724c5d · d724c5d · blueprint-bot · Mar 12, 2019
1 parent a919718
commit d724c5d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/core/src/components/forms/controls.tsx b/packages/core/src/components/forms/controls.tsx
@@ -252,7 +252,7 @@ export class Checkbox extends React.PureComponent<ICheckboxProps, ICheckboxState
     }
 
     private updateIndeterminate() {
-        if (this.state.indeterminate != null) {
+        if (this.input != null) {
             this.input.indeterminate = this.state.indeterminate;
         }
     }