Returns true if the provided CSS property name is supported on this element.
Please note the property name camelCase, not-hyphens. This method returns true if the property is accessible via an unprefixed or prefixed property.
bool supportsProperty(String propertyName) { return _supportsProperty(propertyName) || _supportsProperty(_camelCase("${Device.cssPrefix}$propertyName")); }
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https://api.dartlang.org/stable/2.0.0/dart-html/CssStyleDeclaration/supportsProperty.html