the parent component passes values to the child component, but the data passed cannot be manipulated within the child component
the parent component can only be notified through this.$emit ().
use this.$refs.xxx. Method ();
this method of using the parent component to invoke the child component
this can manipulate data within the child component
but the second way is to say there is a problem on the Internet!
could you tell me which way is better?
can be operated on the sub-component, received in the data of the sub-component, and then operated on data.
these are two ways for parent-child components to communicate. It is better to see usage scenarios ,
if there is no better one.the first way is relatively good, the second method is to directly operate dom to achieve, which will affect performance, in fact, you mean two-way binding, you can add .sync in the component, sub-components through $emit ('update: specific variables'), you can achieve two-way effect!
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