Page.headerData ViewHelper `<f:page.headerData>`

New in version 14.0

The <f:page.headerData> ViewHelper allows injecting arbitrary content into the HTML <head> of a rendered page.

The ViewHelper internally uses the PageRenderer API and is useful when ViewHelpers like <f:asset.css> or <f:asset.script> do not support all required attributes or use cases (for example dns-prefetch, preconnect, tracking scripts, or inline JavaScript).

Warning

The ViewHelper outputs given content as is. Possible user supplied input for the ViewHelpers must manually be escaped in order to prevent a Cross-site scripting (XSS) vulnerability.

Go to the source code of this ViewHelper: Page\HeaderDataViewHelper.php (GitHub).

Table of contents

Example usage

packages/my_sitepackage/Resources/Private/Templates/Page/Default.fluid.html

<f:page.headerData>
    <link rel="preload" href="/fonts/myfont.woff2" as="font" type="font/woff2" crossorigin="anonymous">
    <link rel="dns-prefetch" href="//example-cdn.com">
    <link rel="preconnect" href="https://example-cdn.com">
</f:page.headerData>

Page.headerData ViewHelper <f:page.headerData>

Example usage

Arguments of the <f:page.headerData> ViewHelper

Page.headerData ViewHelper `<f:page.headerData>`

Arguments of the `<f:page.headerData>` ViewHelper