Кнопка загрузки в HTML
<form action="/action_page.php">
<input type="file" id="myFile"
name="filename">
<input type="submit">
</form>
https://programmingonly.com/
<form action="/action_page.php">
<input type="file" id="myFile"
name="filename">
<input type="submit">
</form>.custom-file-upload {
border: 1px solid #ccc;
display: inline-block;
padding: 6px 12px;
cursor: pointer;
}