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LibWeb: Implement 'State-preserving atomic move integration'

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This was recently added to both the HTML and DOM specifications,
introducing the new moveBefore DOM API, as well as the new internal
'removing steps'.

See:

 * 432e8fb
 * eaf2ac7
This commit is contained in:
Shannon Booth 2025-03-08 12:45:26 +13:00 • committed by Andrew Kaster
parent a47c4dbc63
commit 31a3bc3681
Notes: github-actions[bot] 2025-04-26 14:46:43 +00:00
39 changed files with 1383 additions and 12 deletions
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5
Libraries/LibWeb/HTML/CustomElements/CustomElementRegistry.cpp
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@ -199,14 +199,15 @@ JS::ThrowCompletionOr<void> CustomElementRegistry::define(String const& name, We
auto& prototype = prototype_value.as_object();
// 3. Let lifecycleCallbacks be the ordered map «[ "connectedCallback" → null, "disconnectedCallback" → null, "adoptedCallback" → null,
// "attributeChangedCallback" → null ]».
// "connectedMoveCallback" → null, "attributeChangedCallback" → null ]».
lifecycle_callbacks.set(CustomElementReactionNames::connectedCallback, {});
lifecycle_callbacks.set(CustomElementReactionNames::disconnectedCallback, {});
lifecycle_callbacks.set(CustomElementReactionNames::adoptedCallback, {});
lifecycle_callbacks.set(CustomElementReactionNames::connectedMoveCallback, {});
lifecycle_callbacks.set(CustomElementReactionNames::attributeChangedCallback, {});
// 4. For each callbackName of the keys of lifecycleCallbacks:
for (auto const& callback_name : { CustomElementReactionNames::connectedCallback, CustomElementReactionNames::disconnectedCallback, CustomElementReactionNames::adoptedCallback, CustomElementReactionNames::attributeChangedCallback }) {
for (auto const& callback_name : { CustomElementReactionNames::connectedCallback, CustomElementReactionNames::disconnectedCallback, CustomElementReactionNames::adoptedCallback, CustomElementReactionNames::connectedMoveCallback, CustomElementReactionNames::attributeChangedCallback }) {
// 1. Let callbackValue be ? Get(prototype, callbackName).
auto callback_value = TRY(prototype.get(callback_name));