Variable

Create and use variables as non-editable things in the content.
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Code

<!DOCTYPE html>
<html>
    <head>
        <title>Redactor</title>
        <meta charset="utf-8">

        <!-- redactor css -->
        <link rel="stylesheet" href="/your-folder/redactor.css" />

        <!-- plugin css -->
        <link rel="stylesheet" href="/your-folder/plugins/variable.css" />
    </head>
    <body>
        <!-- element -->
        <textarea id="content">...</textarea>

        <!-- redactor js -->
        <script src="/your-folder/redactor.js"></script>

        <!-- plugin js -->
        <script src="/your-folder/plugins/variable.js"></script>

        <!-- call -->
        <script>
        $R('#content', {
            plugins: ['variable'],
            variables: ['username', 'email', 'password', 'name', 'lastname', 'country']
        });
        </script>
    </body>
</html>