Constant required

pub const required: AttributeDescription;

Usage in rsx

let required = "value";

rsx! {
    // Attributes need to be under the element they modify
    input {
        // Attributes are followed by a colon and then the value of the attribute
        required: "value"
    }
    input {
        // Or you can use the shorthand syntax if you have a variable in scope that has the same name as the attribute
        required,
    }
};