fix(slider): add value to onBlur (#11348)

* fix(slider): add value to onBlur

* chore(slider): test changes

* feat(slider): add value validity for on blur

* feat(slider): add value validity for on blur

packages/react/src/components/Slider/Slider.js

@@ -122,6 +122,12 @@ export default class Slider extends PureComponent {
      */
     name: PropTypes.string,
 
+    /**
+     * Provide an optional function to be called when the input element
+     * loses focus
+     */
+    onBlur: PropTypes.func,
+
     /**
      * The callback to get notified of change in value.
      */
@@ -433,11 +439,13 @@ export default class Slider extends PureComponent {
     if (!evt || !('target' in evt) || typeof evt.target.value !== 'string') {
       return;
     }
+
     // determine validity of input change after clicking out of input
     const validity = evt.target.checkValidity();
-    this.setState({
-      isValid: validity,
-    });
+    const { value } = evt.target;
+
+    this.setState({ isValid: validity });
+    this.props.onBlur({ value });
   };
 
   /**