HTML <input> element
<input> tag defines a data control which user can edit.
It has various types, including button, checkbox, file, hidden, image, number, password, radio, reset, submit,
and text. HTML5 has some new types including color, date, datetime, datetime-local, email,
month, range, resarch, tel, time, url and week.
Specific attributes of <input> tag:
| Attribute | Description |
| action |
file URL to process the input |
| autocomplete |
give auto suggestions when the user type in the field |
| autofocus |
automatic focus on the input field when the page loads |
| disabled |
the status of the input is disabled |
| height |
height of the input |
| width |
width of the input |
| list |
reference to a drop down data list |
| max |
maximum value of the input field |
| min |
minimal value of the input field |
| maxlength |
maximum length of the input field |
| multiple |
multiple values allowed |
| readonly |
the input field in read only, and cannot be edited |
| required |
the field is required |
| size |
character size of the field |
| value |
value of the input |
| checked |
the input checked when loads, radio and checkbox only |
| src |
URL of the input, image type only |
