markdown编辑器优化

resources/views/form/markdown.blade.php

@@ -6,9 +6,9 @@
 
         @include('admin::form.error')
 
-        <div class="{{$class}}" id="{{$id}}" name="{{$name}}" placeholder="{{ $placeholder }}" {!! $attributes !!} ></div>
-
-        <div id="{{$id}}-template" class="d-none">{{ old($column, $value) }}</div>
+        <div id="{{$id}}" class="{{$class}}" {!! $attributes !!}>
+            <textarea class="d-none" name="{{$name}}" placeholder="{{ $placeholder }}">{!! old($column, $value) !!}</textarea>
+        </div>
 
         @include('admin::form.help-block')
 

src/Form/Field/Markdown.php

@@ -144,14 +144,6 @@ class Markdown extends Field
             $this->options['imageUploadURL'] = $this->defaultImageUploadUrl();
         }
 
-        $this->options['onload'] = JavaScript::make(
-            <<<JS
-function () {
-    this.setMarkdown($('#{$this->id}-template').text());
-}
-JS
-        );
-
         if (config('app.locale') !== 'zh-CN') {
             Admin::js($this->language);
         }