Add shouldExtractValueFromUnion and fix default value bug

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## [Unreleased]
+
+### Added
+- Support for `shouldExtractValuesFromUnion` parser option.
+
+### Fix
+- Non-string default values caused an error.
+
 ## [1.4.2] - 2020-03-29
 
 ### Fix

README.md

@@ -42,6 +42,7 @@ To speed things up a bit, it is recommended to include the plugin settings `incl
 | skipPropsWithName    | false        | string[] or string | This option is passed along to `react-docgen-typescript`'s parser. It globally ignores props with the specified name(s).                                                                              | `"classname"` or `["classname", "color"]` |
 | skipPropsWithoutDoc  | false        | boolean            | This option is passed along to `react-docgen-typescript`'s parser. It globally ignores props without documentation.                                                                                   | `true`                                    |
 | shouldExtractLiteralValuesFromEnum  | false        | boolean            | This option is passed along to `react-docgen-typescript`'s parser. It convert string enums and unions to docgen enum format. Possible values are still accessible.                                                                                   | `true`                                    |
+| shouldExtractValuesFromUnion  | false        | boolean            | This option is passed along to `react-docgen-typescript`'s parser. It convert multiple types to docgen enum format. Possible values are still accessible.                                                                                   | `true`                                    |
 | docgenCollectionName | false        | string             | Enables collecting docgen data into a global object. This is used to integrate with tools like Storybook.                                                                                             | `"STORYBOOK_REACT_CLASSES"`               |
 | include              | false        | string             | A regular expression of files to pass along to `react-docgen-typescript`'s parser. Defaults to `\.tsx$`.                                                                                              | `"components.*\\.tsx$"`                   |
 | exclude              | false        | string             | A regular expression to filter the results from include. For instance, you can add a regular expression to prevent files ending in `.stories.tsx` from being processed in your component directories. | `"stories\\.tsx$"`                        |

package.json

@@ -53,6 +53,6 @@
     "typescript": "^3.0.1"
   },
   "dependencies": {
-    "react-docgen-typescript": "^1.16.2"
+    "react-docgen-typescript": "^1.20.4"
   }
 }

src/__fixtures__/Component.tsx

@@ -1,6 +1,7 @@
 import * as React from "react";
 
 type Size = "small" | "default" | "large";
+type TabIndex = -1 | 0 | 1 | 2;
 interface ButtonProps {
   /**
    * Label for button.
@@ -22,6 +23,16 @@ interface ButtonProps {
    * Defines the size of the button.
    */
   size?: Size;
+
+  /**
+   * Defines the tabIndex of the button.
+   */
+  tabIndex?: TabIndex;
+
+  /**
+   * Defines if a button is disabled.
+   */
+  disabled?: boolean;
 }
 
 /**
@@ -31,6 +42,8 @@ class Button extends React.Component<ButtonProps> {
   static defaultProps = {
     label: "label",
     size: "default",
+    disabled: false,
+    tabIndex: -1,
   };
 
   render() {