Hello,
I want to optimize my application for SEO. Therefore I need to add additional dynamic META Tags to the <head> element of the HTML page. e.g:
<script type="application/ld+json">
{
"@context": "https://schema.org/",
"@type": "Recipe",
"name": "Party Coffee Cake",
"author": {
"@type": "Person",
"name": "Mary Stone"
},
"datePublished": "2018-03-10",
"description": "This coffee cake is awesome and perfect for parties.",
"prepTime": "PT20M"
}
</script>
Furthermore I have the need to add additional Json-LD elements to the content. Would be great if someone has an idea how to realize.
Best regards
Mike
gorelov
(Gleb Gorelov)
#2
Hi,
In order to modify the <head> element you need to implement a custom BootstrapListener, e.g:
import com.vaadin.server.BootstrapFragmentResponse;
import com.vaadin.server.BootstrapListener;
import com.vaadin.server.BootstrapPageResponse;
import org.jsoup.nodes.Element;
import org.springframework.stereotype.Component;
@Component("demo_CustomBootstrapListener")
public class CustomBootstrapListener implements BootstrapListener {
@Override
public void modifyBootstrapFragment(BootstrapFragmentResponse response) {
}
@Override
public void modifyBootstrapPage(BootstrapPageResponse response) {
Element head = response.getDocument().getElementsByTag("head").get(0);
Element ceoScript = response.getDocument().createElement("script");
ceoScript.attr("type", "application/ld+json");
ceoScript.text("{\"@context\":\"https://schema.org/\",\"@type\":\"Recipe\",\"name\":\"Party Coffee Cake\",\"author\":{\"@type\":\"Person\",\"name\":\"Mary Stone\"},\"datePublished\":\"2018-03-10\",\"description\":\"This coffee cake is awesome and perfect for parties.\",\"prepTime\":\"PT20M\"}");
head.appendChild(ceoScript);
}
}
Gleb
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