Why does _this2.refs.push is not a function error occur in react?

Question

React

there is a property in the class constructor - this.refs = [] array, why is the context lost?

<div className="listElem">
  37 |     		    {n}
  38 |              
> 39 | 	<input type="checkbox" ref={ (input) => {this.refs.push(input)}}/>
  40 | </div>
  41 |          )})
  42 |          }

Answer 1

Because it is a built-in object that cannot be overridden, and the object does not have a push method.
Call it something else.)