Fixed issue #9027 (#9042)

mui · Nov 8, 2017 · 1a26a15 · 1a26a15
1 parent d732bb1
commit 1a26a15
Show file tree

Hide file tree

Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/src/Form/FormControl.js b/src/Form/FormControl.js
@@ -178,7 +178,10 @@ class FormControl extends React.Component<ProvidedProps & Props, State> {
   };
 
   handleBlur = event => {
-    if (this.props.onBlur) {
+    // The event might be undefined.
+    // For instance, a child component might call this hook
+    // when an input is disabled but still having the focus.
+    if (this.props.onBlur && event) {
       this.props.onBlur(event);
     }
     if (this.state.focused) {

diff --git a/src/Form/FormControl.spec.js b/src/Form/FormControl.spec.js
@@ -227,7 +227,7 @@ describe('<FormControl />', () => {
           const handleBlur = spy();
           wrapper.setProps({ onBlur: handleBlur });
           muiFormControlContext.onFocus();
-          muiFormControlContext.onBlur();
+          muiFormControlContext.onBlur({});
           assert.strictEqual(handleBlur.callCount, 1);
         });
       });