Merge pull request #513 from mesosphere/react16/field-input

fix: check if DOM node exists

Author: nLight

src/Form/FieldInput.js

@@ -66,7 +66,11 @@ class FieldInput extends Util.mixin(BindMixin) {
  props.handleSubmit();
  }
 
- ReactDOM.findDOMNode(this.inputElementRef.current).blur();
+ const inputNode = ReactDOM.findDOMNode(this.inputElementRef.current);
+
+ if (inputNode) {
+ inputNode.blur();
+ }
  }
  }