Deferred Rendering
Deferred rendering allows you to insert pieces of markup into a template based
on data that might be supplied later, perhaps by a component template or by some
inner markup in a block passed to the template. One use of this technique is to
allow components to add script sources to a page. Deferred rendering is done by
calling defer:
Layout = ->(**props) {
html {
head {
defer {
props[:style_urls]&.each_key {
link(rel: "stylesheet", type: "text/css", href: it)
}
}
}
body {
render_children(**props)
}
}
}
SpecialButton = ->(id:, text:, **props) {
(props[:style_urls] ||= {})['/assets/button_style.css'] = true
button(text, id:)
}
Papercraft.html(Layout) { |**props|
div {
SpecialButton(id: 'button1', text: 'Click here', **props)
}
}