html forms only accept csv files code example

Example 1: jquery accept only excel file

<input type="file" ID="fileSelect" accept=".xlsx, .xls, .csv"/>

Example 2: input type file csv only

<input type="file" id="img" name="img" accept=".csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel">