Input file accepts file types

input-files.html

<!-- CSV only -->
<input type="file" accept=".csv" />

<!-- only CSV and XLS XLSX  -->
<input id="fileSelect" type="file" accept=".csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel" />  

<!-- only excel 2007 and up -->
<input type="file" accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" />

<!-- Only pdf -->
<input type="file" accept=".pdf" />

<!-- Audio only -->
<input type="file" accept="audio/*" />

<!-- only IMage type -->
<input type="file" accept="image/*" />

<!-- Video Only -->
<input type="file" accept="video/*" />

<!-- txt only -->
<input type="file" accept="text/plain" />