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Properties are accessed and mutated directly, just like a plain object.",{"id":183,"topic":9,"difficulty":153,"body":184,"options":185,"correct_key":163,"explanation":194},"019f7766-2fec-7b41-8f57-a8124aac6e54","Which value type is `ref()` generally recommended for, compared to `reactive()`?",[186,188,190,192],{"key":157,"text":187},"Only arrays",{"key":160,"text":189},"Only DOM elements",{"key":163,"text":191},"Primitives, though it also works for objects",{"key":166,"text":193},"Only functions","`reactive()` only works on objects\u002Farrays\u002FMaps\u002FSets (its Proxy-based tracking needs a target object) — it can't make a primitive like a number reactive on its own. `ref()` works for any value type, which is why it's the general-purpose default, especially for primitives.",{"id":196,"topic":9,"difficulty":153,"body":197,"options":198,"correct_key":166,"explanation":207},"019f7766-2fed-7ad0-9d31-6fc740830c6d","By default, is the value returned by `computed(() => ...)` writable?",[199,201,203,205],{"key":157,"text":200},"Yes, always, exactly like a `ref`",{"key":160,"text":202},"Only inside `\u003Ctemplate>`",{"key":163,"text":204},"Only if wrapped in `reactive()`",{"key":166,"text":206},"No, a plain getter computed is read-only","`computed(getter)` produces a read-only ref; assigning to its `.value` in dev mode logs a warning and has no effect. 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