The watchEffect Function
watchEffect(fn) runs its function immediately and re-runs it whenever anything it read changes, collecting dependencies automatically on each run with no old-value access. By default it flushes pre (before DOM update); flush: 'post' waits for the DOM and flush: 'sync' runs immediately on every trigger, and await nextTick() is how code waits for the post-update DOM.
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watchEffect(fn) runs its function immediately and re-runs it whenever anything it read changes, collecting dependencies automatically on each run with no old-value access. By default it flushes pre (before DOM update); flush: 'post' waits for the DOM and flush: 'sync' runs immediately on every trigger, and await nextTick() is how code waits for the post-update DOM.
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