编辑代码

function centerPositon(arr){
    let centerPoint = []
    for(let i =1 ; i < arr.length ; i++){
        let leftProduct = 1
        let rightProduct = 1
        for(let j = i-1;j>=0;j--){
            leftProduct = leftProduct*arr[j]
        }
        for(let x = i+1;x<arr.length;x++){
            rightProduct = rightProduct*arr[x]
        }
        if(leftProduct === rightProduct){
            centerPoint.push(i)
        }
    }
    if(centerPoint.length>0){
        console.log(centerPoint[0])
    }else{
        console.log(null)
    }

}
centerPositon([2,5,3,6,5,6])