array is stored in state, and the page needs to be updated in real time as it changes.
the official document uses the calculation attribute computed. I usually pass it directly in the parent component and get it with props, so that when the state changes, it can directly affect the current component.
is there any difference between the two ways?
the difference is that the data is changed in a different way.
parent and child components use emit
computed in the vuex way
if you need the value of this array after some calculation, use computed
for example, you want to filter map reduce the array passed in by prop or calculate it with other state and props to get its return value and then act on the current component
if you don't need the calculated array values, you can just take advantage of this prop
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