Input - multiple

<input multiple>

Example :

<input type="file" id="files" name="files" multiple>

The multiple attribute is a Boolean attribute.

When present, it specifies that the user is allowed to enter more than one value in the <input> element.

Note: The multiple attribute works with the following input types: email, and file.

Tip: For <input type="file">: To select multiple files, hold down the CTRL or SHIFT key while selecting.

Tip: For <input type="email">: Separate each email with a comma, like: mail@example.com, mail2@example.com, mail3@example.com in the email field.