How to read the data from excel from specific rows and columns in angular

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Typescript

Angular10

I want to read the Excel Data which contains the below format. The Actual Data will start from row no 7, row no 6 will have the headers. I want to start the data reading from row 7.

SL.No EmployeeName Worked Date Start Time End Time Worked Hours
1 AAAA 21-01-2021 10:00 16:00 6
2 BBBB 21-01-2021 11:00 16:00 5
........... .............. .................. .......... ............. ............
1000 XXXX 21-01-2021 08:00 17:00 9

What I have tried:

addfile(event)     
  {    
    let data, header;
    const target: DataTransfer = <DataTransfer>(event.target);
    this.isExcelFile = !!target.files[0].name.match(/(.xls|.xlsx)/);
    if (target.files.length > 1) {
      //this.inputFile.nativeElement.value = '';
    }
    if (this.isExcelFile) {
      this.spinnerEnabled = true;
      const reader: FileReader = new FileReader();
      reader.onload = (e: any) => {
        /* read workbook */
        const bstr: string = e.target.result;
        const wb: XLSX.WorkBook = XLSX.read(bstr, { type: 'binary' });

        /* grab first sheet */
        const wsname: string = wb.SheetNames[0];
        const ws: XLSX.WorkSheet = wb.Sheets[wsname];

        /* save data */
        data = XLSX.utils.sheet_to_json(ws);
      };

      reader.readAsBinaryString(target.files[0]);

      reader.onloadend = (e) => {
        this.spinnerEnabled = false;
        this.keys = Object.keys(data[0]);
        //console.log(this.keys);
        //console.log(data);
        for(var i = 5; i != data.length; ++i) 
        {
          console.log(data[i]);
        }
        //this.dataSheet.next(data)
      }
    } else {
      //this.inputFile.nativeElement.value = '';
    }   
}