[riaron86]

выводит пустой экран

import React,{useState,useRef,useEffect} from 'react';
function Polzunok() {
    const  pstart= useRef(1);
    const  ppend= useRef(15000);

    const [pstartValue, setPstartValue] = useState(1);
    const [ppendValue, setPpendValue] = useState(15000);
    const [lastActive, setLastActive] = useState(0);
    function checkError( a, b, c){
        if(c==1){
            if(a>b){
                a=b-100;
            }else if(a<b){
                console.log("this a < b");
            }
        }else if(c==2){
            if(a>b){
                b=a+100;
            }else if(a<b){
                console.log("a < this b");
            }
        }else{
            console.log("else");
        }
    }
    useEffect(() => {
        pstart.current.addEventListener('change', e => {
            setLastActive(1);
            setPstartValue(e.target.value);
        })
        ppend.current.addEventListener('change', e => {
            setLastActive(2);
            setPpendValue(e.target.value);

        })
        lastActive.addEventListener('change',checkError( pstartValue, ppendValue,lastActive));
    }, []);

    return (
        <div className="container">
            <h5 className="polzName">Название</h5><br/>
            <div className="slider"></div>
            <div>
                <input type="range" ref={pstart} className="pp" min="0" max="16000"/>
                <input type="range" ref={ppend}  className="pp" min="0" max="16000"/>
            </div>
            <div><p>"start" {pstartValue} "end" {ppendValue}<br/>"lastActive":{lastActive}</p></div>
        </div>
    );
}

export default Polzunok;