[增添]添加了datasource的setting数据库以及默认值

vendor/filament/forms/docs/03-fields/15-textarea.md

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+---
+title: Textarea
+---
+import AutoScreenshot from "@components/AutoScreenshot.astro"
+
+## Overview
+
+The textarea allows you to interact with a multi-line string:
+
+```php
+use Filament\Forms\Components\Textarea;
+
+Textarea::make('description')
+```
+
+<AutoScreenshot name="forms/fields/textarea/simple" alt="Textarea" version="3.x" />
+
+## Resizing the textarea
+
+You may change the size of the textarea by defining the `rows()` and `cols()` methods:
+
+```php
+use Filament\Forms\Components\Textarea;
+
+Textarea::make('description')
+    ->rows(10)
+    ->cols(20)
+```
+
+### Autosizing the textarea
+
+You may allow the textarea to automatically resize to fit its content by setting the `autosize()` method:
+
+```php
+use Filament\Forms\Components\Textarea;
+
+Textarea::make('description')
+    ->autosize()
+```
+
+## Making the field read-only
+
+Not to be confused with [disabling the field](getting-started#disabling-a-field), you may make the field "read-only" using the `readOnly()` method:
+
+```php
+use Filament\Forms\Components\Textarea;
+
+Textarea::make('description')
+    ->readOnly()
+```
+
+There are a few differences, compared to [`disabled()`](getting-started#disabling-a-field):
+
+- When using `readOnly()`, the field will still be sent to the server when the form is submitted. It can be mutated with the browser console, or via JavaScript. You can use [`dehydrated(false)`](advanced#preventing-a-field-from-being-dehydrated) to prevent this.
+- There are no styling changes, such as less opacity, when using `readOnly()`.
+- The field is still focusable when using `readOnly()`.
+
+## Textarea validation
+
+As well as all rules listed on the [validation](../validation) page, there are additional rules that are specific to textareas.
+
+### Length validation
+
+You may limit the length of the textarea by setting the `minLength()` and `maxLength()` methods. These methods add both frontend and backend validation:
+
+```php
+use Filament\Forms\Components\Textarea;
+
+Textarea::make('description')
+    ->minLength(2)
+    ->maxLength(1024)
+```
+
+You can also specify the exact length of the textarea by setting the `length()`. This method adds both frontend and backend validation:
+
+```php
+use Filament\Forms\Components\Textarea;
+
+Textarea::make('question')
+    ->length(100)
+```