src / app / app.component.ts（50,20）中的错误：错误TS2339：类型“ HTMLElement”上不存在属性“行”

Question

代码：

submit()
    {
        var myTad = document.getElementById('rr');
        var len = myTad.rows.length ;
        var arr = [];
        var values =[];
        var key1 ="Task_NO";var key2 ="EFFORT_MONTH";var key3 ="ROLE";var key4 ="LOC"; var key5 
  ="ESTIMATED_HOURS"; var key6 ="CNTY";
        var key7 ="EMPLOYEE_LEVEL";var key8 ="AUTHENTED_HOURS";var key9 ="ESTIMATED_COST"; var key10 
   ="ACTUAL_COST";
        console.log("Row_length:" +len);

        for( var z =0; z < len ; z++ )
        { 
            for( var y = 0; myTad.rows[z].cells[y]; y++){
                if(myTad.rows[z].cells[y].childNodes[0].getAttribute("type") == 'button'){

                }else{
                    values.push(myTad.rows[z].cells[y].childNodes[0].value);
            }
        }
        for(var k =0; k < values.length ;k++){
            var dict = {};
            dict[key1] = Number(values[0]);
            dict[key2] =Number(values[1]);
            dict[key3] = (values[2]);
            dict[key4] = (values[3]);
            dict[key5] = Number(values[4]);
            dict[key6] = (values[5]);
            dict[key7] = Number(values[6]);
            dict[key8] = Number(values[7]);
            dict[key9] = Number(values[8]);
            dict[key10] = Number(values[9]);

        }
        arr.push(dict);
        dict ={};
        values =[];

        }
     }


   uploadExcel()
   {
    var arr= [];
   var myfile = document.getElementById('file');
    var input = myfile;
    var reader =new FileReader();
        reader.onload = function(){
      var fileData =reader.result;
      var workbook = XLSX.read(fileData, {type:'binary'});
      workbook.SheetNames.forEach(function(sheetName){
        var rowObject = XLSX.utils.sheet_to_row_object_array(workbook.Sheets[sheetName]);
          var json_object = JSON.stringify(rowObject);
          arr = rowObject;

      });
      //debugger;
      for(var i=0;i<arr.length;i++){
      var data=arr[i];
        $("#customFields tbody").empty();
        //$("#customFields tfoot").append("<tr style='text-align:center;'><td style='border:1px 
      solid black;'><input type='text' value="+data.TASK_NO+"></td><td style='border:1px solid 
     black;'><input type='text' value="+data.EFFORT_MONTH+"></td><td style='border:1px solid 
   black;'><input type='text' value="+data.EMPLOYEE_LEVEL+"></td><td style='border:1px solid 
    black;'><input type='text' value="+data.ROLE+"></td><td style='border:1px solid black;'><input 
    type='text' value="+data.LOCATION+"></td><td style='border:1px solid black;'><input type='text' 
   value="+data.ESTIMATED_HOURS+"></td><td style='border:1px solid black;'><input type='text' 
   value="+data.COUNTRY+"></td><td style='border:1px solid black;'><input type='text' 
   value="+data.AUTHENTED_HOURS+"></td><td style='border:1px solid black;'><input type='text' 
  value="+data.ESTIMATED_COST+"></td><td style='border:1px solid black;'><input type='text' 
  value="+data.ACTUAL_COST+"></td></tr>");
        $("#customFields tfoot").append("<tr style='text-align:center;' contenteditable='true'><td 
   style='border:1px solid black;'>"+data.TASK_NO+"</td><td style='border:1px solid 
  black;'>"+data.EFFORT_MONTH+"</td><td style='border:1px solid black;'>"+data.EMPLOYEE_ROLE+"</td> 
  <td style='border:1px solid black;'>"+data.LOCATION+"</td><td style='border:1px solid 
  black;'>"+data.ESTIMATED_HOURS+"</td><td style='border:1px solid black;'>"+data.COUNTRY+"</td><td 
  style='border:1px solid black;'>"+data.EMPLOYEE_LEVEL+"</td><td style='border:1px solid 
  black;'>"+data.AUTHENTED_HOURS+"</td><td style='border:1px solid black;'>"+data.ESTIMATED_COST+" 
  </td><td style='border:1px solid black;'>"+data.ACTUAL_COST+"</td></tr>");
    }

  };
  reader.readAsBinaryString(input.files[0]);
 }

初始表不包含行，如果要解决此错误，请设法在上面创建行错误，但请帮忙...如果我要一次，请及时进行此问题的发生更改并成功完成。我无法理解此问题...

ERROR in src/app/app.component.ts(50,20): error TS2339: Property 'rows' does not exist on type 
    'HTMLElement'.
     src/app/app.component.ts(59,27): error TS2339: Property 'rows' does not exist on type 
    'HTMLElement'.
     src/app/app.component.ts(60,15): error TS2339: Property 'rows' does not exist on type 
    'HTMLElement'.
     src/app/app.component.ts(63,25): error TS2339: Property 'rows' does not exist on type 
    'HTMLElement'.
     src/app/app.component.ts(98,20): error TS2339: Property 'rows' does not exist on type 
    'HTMLElement'.
     src/app/app.component.ts(109,27): error TS2339: Property 'rows' does not exist on type 
     'HTMLElement'.
     src/app/app.component.ts(113,26): error TS2339: Property 'rows' does not exist on type 
     'HTMLElement'.
     src/app/app.component.ts(172,31): error TS2339: Property 'sheet_to_row_object_array' does not exist 
     on type 'XLSX$Utils'.
     src/app/app.component.ts(186,36): error TS2339: Property 'files' does not exist on type 
     'HTMLElement'.