Implement Preloader with Mutation Observer
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Remove all external calls to `preloadOnLoadLinksForView`. In its place, introduce a new `AttributeObserver` to monitor all elements within a scope that: * added the `[data-turbo-preload]` attribute * connected with the `[data-turbo-preload]` attribute * connected with children that have the `[data-turbo-preload]` attribute The details of this observation are abstracted into the `AttributeObserver`, which will notify its delegate whenever those conditions are met. The delegate is responsible for responding to those conditions. For example, the `Preloader` ensures that the element is an `<a>` element, and that the element matches the expectations of **its** own delegate (the `Session` instance). The implementation for the `AttributeObserver` draws inspiration from its [@hotwired/stimulus][] counterpart. [@hotwired/stimulus]: https://github.com/hotwired/stimulus/blob/v3.2.2/src/mutation-observers/attribute_observer.ts
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brunoprietog
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Nov 2, 2025
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Remove all external calls to
preloadOnLoadLinksForView. In its place,introduce a new
AttributeObserverto monitor all elements within ascope that:
[data-turbo-preload]attribute[data-turbo-preload]attribute[data-turbo-preload]attribute
The details of this observation are abstracted into the
AttributeObserver, which will notify its delegate whenever thoseconditions are met. The delegate is responsible for responding to those
conditions. For example, the
Preloaderensures that the element is an<a>element, and that the element matches the expectations of itsown delegate (the
Sessioninstance).The implementation for the
AttributeObserverdraws inspiration fromits @hotwired/stimulus counterpart.