is it necessary to re-render the setState later, regardless of whether the data of the sub-component has changed or not? if so, what is the use of the diff algorithm?
is it necessary to re-render the setState later, regardless of whether the data of the sub-component has changed or not? if so, what is the use of the diff algorithm?
renders vdom, compares the vdom generated before and after data changes using the diff algorithm, and finds the operation to minimize dom
normally it will.
if PureComponent is used or processed in shouldComponenetUpdate , then
setState triggers the subcomponent's recalculation vdom, but does not necessarily update dom
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