viewport method
Definition of viewport meta tag attribute Separate list of viewport strings by commas https://developer.mozilla.org/en-US/docs/Web/HTML/Viewport_meta_tag Add web mata data of viewport attribute Example: String? viewport = 'width=device-width, initial-scale=1'; Implement the interface
Implementation
@override
viewport(
{
/// Definition of [viewport] meta tag attribute
required String viewport}) {
/// Call the javascript function with needed attributes
js.context.callMethod('seoNameJS', ['viewport', viewport]);
}