Visual Composer custom shortcode template - custom_markup display user input

I have created some shortcode elements. Now I want to customize the look of the elements in the backend editor.

From the [description][1] of the wiki of VC-Pagebuilder, I get out that I can use the "custom_markup" param for this.

For simple html it works fine. But I can not display the user input in the shortcode backend element.

<?php
add_shortcode('simpletext', 'simpletext_shortcode');
add_action('vc_before_init', 'simpletext_vc');

// Frontend output

function simpletext_shortcode($atts, $content = '') {
ob_start();
set_query_var('content', $content);
get_template_part('components/content', 'simpletext');
return ob_get_clean();
}

// Backend
function simpletext_vc() {
vc_map(array(
"name" => "Einfacher Text",
"base" => "simpletext",
"class" => "",
"icon" => get_template_directory_uri() ."/images/vc_icons/simpletext_icon.png",
"custom_markup" => '{{ content }}', // try to display the user input
"category" => "Text",
"params" => array(
array(
"param_name" => "content",
"heading" => "Inhalt",
"description" => "Inhalt des Elements.",
"holder" => "div",
"type" => "textarea_html"
)
)
));
}
?>

I 'm grateful for any help .


[1]:

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