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Previously effects were queued as they became dirty, and this queue was flushed at various checkpoints during the change detection cycle. The result was that change detection _was_ the effect runner, and without executing CD, effects would not execute. This leads a particular tradeoff: * effects are subject to unidirectional data flow (bad for dx) * effects don't cause a new round of CD (good/bad depending on use case) * effects can be used to implement control flow efficiently (desirable) This commit changes the scheduling mechanism. Effects are now scheduled via the microtask queue. This changes the tradeoffs: * effects are no longer limited by unidirectional data flow (easy dx) * effects registered in the Angular zone will trigger CD after they run (same as `Promise.resolve` really) * the public `effect()` type of effect probably isn't a good building block for our built-in control flow, and we'll need a new internal abstraction. As `effect()` is in developer preview, changing the execution timing is not considered breaking even though it may impact current users. PR Close #51049 |
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| browser.ts | ||
| browser_util.ts | ||
| matchers.ts | ||
| testing.ts | ||