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this.theme
You can access the current theme object via this.theme and it returns the object Cms\Classes\Theme, a reference to the theme customization object.
# Properties
this.theme will provide direct access to form field values, defined by any theme customization. It also has the following properties natively.
# id
Converts the theme directory name to a CSS friendly identifier.
<body class="theme-{{ this.theme.id }}">
If the theme directory was website this would generate a class name of theme-website.
# config
An array containing all the theme configuration values found in the theme.yaml file.
<meta name="description" content="{{ this.theme.config.description }}">