两个数组比较，得出不重复的元素

var arr1=[1,2,3,4,5,6,7,8,9,10,0],arr2=[7,0,6,5,2];
  function filterArr(allArr,selecArr){
    var midArr = arr1;
    for(var item of arr2){
      midArr = midArr.filter( (val1)=>{
        return val1!=item;
      } )
      // console.log( midArr );
    }
    return midArr;
  }
  var res = filterArr(arr1,arr2);
  console.log( res );