How to subscribe a child to an event?

Question

JavaScript

I have a parent component that creates several other child components that need to be very difficult to animate. That is, the parent component should track their position every tick and, based on the collected data, implement one or another scenario. And children must send events that the parent catches. explain in words how to do this?

Answer 1

For example, like this

class Parent {
  ....
  handleChildTick(someData){
      // обработать данные от потомка 
      // (указание на конкретного потомка можно вставить в структуру someData)
  }
  ....
  render(){
      ....
      <Child ... onTick={this.handleChildTick} />
      ....
  }
}

class Child {
  ....
  someAction(){
      ....
      if(this.props.onTick)
          this.props.onTick(someData)
      ....
  }
}

Answer 2

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