Angular 18 #13 - Deferrable Views Triggers - Prefetch & When(To call custom trigger event)
Автор: Let's Build With Code
Загружено: 2024-09-19
Просмотров: 103
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Deferrable View
When a @defer block is triggered, it replaces placeholder content with lazily loaded content. There are two options for configuring when this swap is triggered: on and when.
on specifies a trigger condition using a trigger from the list of available triggers below. An example would be on interaction or on viewport.
Multiple event triggers can be defined at once. For example: on interaction; on timer(5s) means that the defer block will be triggered if the user interacts with the placeholder, or after 5 seconds.
i.) Idle
ii.) viewport
iii.) Interaction
iv.) hover
v.) immediate
vi.) Timer
Prefetching
@defer allows to specify conditions when prefetching of the dependencies should be triggered. You can use a special prefetch keyword. prefetch syntax works similarly to the main defer conditions, and accepts when and/or on to declare the trigger.
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