Add FAQ page to demo

Author: rvsia

packages/react-renderer-demo/src/components/navigation/schemas/schema.js

@@ -61,6 +61,10 @@ const schema = [
     linkText: 'Releases',
     link: 'releases'
   },
+  {
+    linkText: 'FAQ',
+    link: 'faq'
+  },
   {
     link: 'migration-guide',
     linkText: 'Migration guide to version 2'

packages/react-renderer-demo/src/pages/faq.md

@@ -0,0 +1,98 @@
+import DocPage from '@docs/doc-page';
+import CodeExample from '@docs/code-example';
+
+<DocPage>
+
+# Frequently Asked Questions (FAQ)
+
+## Q. Docs for version 1.x still available anywhere?
+
+**A.** Docs are available [here](https://pokus-next.firebaseapp.com/) or you can use [old branch](https://github.com/data-driven-forms/react-forms/tree/v1/packages/react-renderer-demo/src/app/pages) on GitHub.
+<br />
+
+---
+<br />
+
+## Q. Is there a way for a field to access another field's value and receive updates whenever it changes?
+
+**A.** Right now, there are two standard ways how to update the second component:
+
+1) Set [subscription](/components/renderer#optionalprops)
+
+```jsx
+<FormRenderer
+  schema={schema}
+  FormTemplate={FormTemplate}
+  componentMapper={componentMapper}
+  onSubmit={console.log}
+  subscription={{values: true}}
+/>
+```
+
+All fields will be updated when values are changed. It will hurt the performance, but in small forms it should be ok.
+
+2) use [formSpy](/components/form-spy)
+
+```jsx
+<FormSpy subscription={{values: true}}>
+   {(formState) => <CustomComponent />}
+</FormSpy>
+```
+<br />
+
+---
+<br />
+
+## Q. How to fill the form values programmatically?
+
+**A.** Use [useFormApi.change(name, value)](/hooks/use-form-api#change) function that allows you to set any value you need.
+<br />
+
+---
+<br />
+
+## Q. Is there a way to divide my form into hierarchial (nested) subsections using only the schema?
+
+**A.**
+
+You can divide the form by using default [sub-form components](/mappers/sub-form).
+
+```
+{
+  "component": "sub-form",
+  "title": "Subform",
+  "description": "This is a subform",
+  "name": "subform",
+  "fields": [
+    {
+      "name": "carrot",
+      "label": "Carrot",
+      "component": "text-field"
+    }
+  ]
+}
+```
+
+Or you can easily implement your own component:
+
+```jsx
+import { useFormApi } from '@data-driven-forms/react-form-renderer';
+
+const Section = ({fields}) => {
+   const { renderForm } = useFormApi();
+
+   return (<div>
+    {renderForm(fields)}
+  </div>);
+}
+```
+<br />
+
+---
+<br />
+
+## Q. I see 'useField must be used inside of a Form' component error when using DDF
+
+**A.** You have probably mixed different DDF modules. Please see [optimization](/optimization) page.
+
+</DocPage>