Alter Action Cable Element to be morph-compatible #650
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Closes #638
Recent changes to integrate with morphing have altered the mental model for some Turbo custom elements, including the
<turbo-cable-stream-source>
element.Custom Elements'
connectedCallback()
anddisconnectedCallback()
(along with Stimulus'connect()
anddisconnect()
) improved upon invoking code immediately, or listening forDOMContentLoaded
events.There are similar improvements to be made to integrate with morphing. First, observe attribute changes by declaring their own
static observedAttributes
properties along withattributeChangedCallback(name, oldValue, newValue)
callbacks. Those callbacks execute the same initialization code as their currentconnectedCallback()
anddisconnectedCallback()
methods.That'll help resolve this issue. In addition to those changes, it's important to emphasize this pattern for consumer applications moving forward. JavaScript code (whether Stimulus controller or otherwise) should be implemented in a way that' resilient to both asynchronous connection and disconnection as well as asynchronous modification of attributes.