upload button in html

1<form action="/action_page.php">
2  <input type="file" id="myFile" 
3  name="filename">
4  <input type="submit">
5</form>

1.custom-file-upload {
2  border: 1px solid #ccc;
3  display: inline-block;
4  padding: 6px 12px;
5  cursor: pointer;
6}