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Informations about the package slipstream

Sitegeist.Slipstream

Header requirements for presentational fusion

"Quantum slipstream transcends the normal warp barrier by penetrating the quantum barrier with a focused quantum field."

The slipstream package allows defining header requirements with presentational fusion by labeling the required tags with a unique attribute. They are later deduplicated and moved to the target position. This allows defining additional the JS and CSS requirements directly with the presentational fusion components.

Authors & Sponsors

The development and the public releases of this package is generously sponsored by our employer sitegeist.

Usage

You can mark any HTML fragment to be moved to the head of the document by adding a data-slipstream attribute.

The slipstream middleware will parse the entire page and detect all those tags. The tags are then removed from the original location and are appended to the header. Every tag is added only once, so if multiple components require the same JS, only one is added to the given location.

By defining the data-slipstream attribute with an XPath, the target can be altered.

To prepend the tag to the given target, you can add the data-slipstream-prepend attribute:

When the setting Sitegeist.Slipstream.debugMode is enabled, HTML comments are rendered to mark where tags were removed and inserted. This is enabled in Development Context by default. If the setting Sitegeist.Slipstream.removeSlipstreamAttributes is enabled, the attributes from slipstream get removed. This is disabled in Development Context by default.

Inner working and performance

The slipstream HTTP middleware will modify all responses with an active X-Slipstream: Enabled HTTP header. This header is added to Neos.Neos:Page and Sitegeist.Monocle:Preview.Page already, so this will work for Neos and Monocle right away. You will have to add the header X-Slipstream: Enabled for other controllers.

Since the response body is parsed and modified, this adds a minor performance penalty to every request. However the package is designed to work together with Flowpack.FullpageCache, which will in turn cache the whole result and mitigate the slight performance drawback.

Installation

Sitegeist.Slipstream is available via packagist run composer require sitegeist/slipstream.

We use semantic-versioning so that every breaking change will increase the major version number.

Contribution

We will gladly accept contributions. Please send us pull requests.

All versions of slipstream with dependencies

PHP Build Version
Package Version
Requires neos/flow Version ^8.0 || ^9.0 || dev-master
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