Disabled state of an input element or button. Type of a link; for example. Build the application in the form of war file and deploy it in Apache.
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, and XML. Input FileUpload required Property Input FileUpload Object. Find out if a file must be selected/uploaded before submitting a form: var x = document.getElementById('myFile').required. Use the Additional Information section of your LinkedIn profile to include links to your company, your website, your blog, your Twitter account, and to other sites that provide professional information about you.
- Value of
- <input type='>
- What does
<input type='hidden'>do? - Defines a field within a form that is not visible to the user.
Contents
Code Example
Input Type File Upload
The hidden value of type defines a form field that is never displayed to the user. The user cannot change the value of the field, or interact with it.
How To Use Input Type Image Tag In Html Form
When the user submits the form, all of the data they have entered is sent, including the data stored invisibly in the hidden fields.
Why Hide a Field?
hidden fields are used programatically, to pass information about the current page to the server.
For example, if a user fills out an enquiry form, we may want to obtain their IP address using a snippet of PHP. We may also want to grab the URL of the referring page. You can see this in action in our code sample; the form captures the information, but does not display it.
Hidden fields allow us to send all kinds of information along with a form message, without the user having to be involved in the process. Hidden fields can also be used to pass information back to scripts. This may include security tokens, or the name of the relevant row in the database. The user does not need to see this data, but it is passed back to the server on submission so that scripts function correctly behind the scenes.
Browser Support for hidden
All values of type
| Value name | Notes |
|---|---|
| button | Defines a button-like input. |
| checkbox | Defines a checkbox, which the user can toggle on or off. |
| file | Defines a file upload box with a browse button. |
| hidden | Defines a field within a form that is not visible to the user. |
| image | Defines an image that is clicked to submit a form. |
| password | Displays an obfuscated password entry field. |
| radio | Defines a circular selection button in a form. |
| reset | Defines a button on a form that will return all fields to their default values. |
| submit | Defines a button that is clicked to submit a form. |
| text | Defines a text entry field in a form. |
All attributes of input
| Attribute name | Values | Notes |
|---|---|---|
| step | Specifies the interval between valid values in a number-based input. | |
| required | Specifies that the input field is required; disallows form submission and alerts the user if the required field is empty. | |
| readonly | Disallows the user from editing the value of the input. | |
| placeholder | Specifies placeholder text in a text-based input. | |
| pattern | Specifies a regular expression against which to validate the value of the input. | |
| multiple | Allows the user to enter multiple values into a file upload or email input. | |
| min | Specifies a minimum value for number and date input fields. | |
| max | Specifies a maximum value for number and date input fields. | |
| list | Specifies the id of a <datalist> element which provides a list of autocomplete suggestions for the input field. | |
| height | Specifies the height of an image input. | |
| formtarget | Specifies the browsing context in which to open the response from the server after form submission. For use only on input types of 'submit' or 'image'. | |
| formmethod | Specifies the HTTP method (GET or POST) to be used when the form data is submitted to the server. Only for use on input types of 'submit' or 'image'. | |
| formenctype | Specifies how form data should be submitted to the server. Only for use on input types 'submit' and 'image'. | |
| formaction | Specifies the URL for form submission. Can only be used for type='submit' and type='image'. | |
| form | Specifies a form to which the input field belongs. | |
| autofocus | Specifies that the input field should be in focus immediately upon page load. | |
| accesskey | Defines a keyboard shortcut for the element. | |
| autocomplete | Specifies whether the browser should attempt to automatically complete the input based on user inputs to similar fields. | |
| border | Was used to specify a border on an input. Deprecated. Use CSS instead. | |
| checked | Specifies whether a checkbox or radio button form input should be checked by default. | |
| disabled | Disables the input field. | |
| maxlength | Specifies the maximum number of characters that can be entered in a text-type input. | |
| language | Was used to indicate the scripting language used for events triggered by the input. | |
| name | Specifies the name of an input element. The name and value of each input element are included in the HTTP request when the form is submitted. | |
| size | Specifies the width of the input in characters. | |
| src | Defines the source URL for an image input. | |
| type | button checkbox file hidden image password radio reset submit text | Defines the input type. |
| value | Defines an initial value or default selection for an input field. |
An object of this type is returned by the files property of the HTML <input> element; this lets you access the list of files selected with the <input type='file'> element. It's also used for a list of files dropped into web content when using the drag and drop API; see the DataTransfer object for details on this usage.
Note: Prior to Gecko 1.9.2, the input element only supported a single file being selected at a time, meaning that the FileList would contain only one file. Starting with Gecko 1.9.2, if the input element's multiple attribute is true, the FileList may contain multiple files.
Using the file list
All <input> element nodes have a files attribute of type FileList on them which allows access to the items in this list. For example, if the HTML includes the following file input:
The following line of code fetches the first file in the node's file list as a File object:
Method overview
File item(index); |
Properties
| Attribute | Type | Description |
length | integer | A read-only value indicating the number of files in the list. |
Methods
item()
Returns a File object representing the file at the specified index in the file list.
Parameters
index- The zero-based index of the file to retrieve from the list.
Return value
The File representing the requested file.
Example
This example iterates over all the files selected by the user using an input element:
Here is a complete example.
Specifications
| Specification | Status | Comment |
|---|---|---|
| File API The definition of 'FileList' in that specification. | Working Draft | |
| HTML Living Standard The definition of 'selected files' in that specification. | Living Standard |
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | Android webview | Chrome for Android | Firefox for Android | Opera for Android | Safari on iOS | Samsung Internet | |
FileList | ChromeFull support Yes | EdgeFull support Yes | FirefoxFull support Yes | IE ? | OperaFull support Yes | SafariFull support Yes | WebView AndroidFull support Yes | Chrome AndroidFull support Yes | Firefox AndroidFull support Yes | Opera AndroidFull support Yes | Safari iOSFull support Yes | Samsung Internet AndroidFull support Yes |
length | ChromeFull support Yes | EdgeFull support 12 | FirefoxFull support Yes | IE ? | OperaFull support Yes | SafariFull support Yes | WebView AndroidFull support Yes | Chrome AndroidFull support Yes | Firefox AndroidFull support Yes | Opera AndroidFull support Yes | Safari iOSFull support Yes | Samsung Internet AndroidFull support Yes |
item | ChromeFull support Yes | EdgeFull support 12 | FirefoxFull support Yes | IE ? | OperaFull support Yes | SafariFull support Yes | WebView AndroidFull support Yes | Chrome AndroidFull support Yes | Firefox AndroidFull support Yes | Opera AndroidFull support Yes | Safari iOSFull support Yes | Samsung Internet AndroidFull support Yes |
Input Type File Filter
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown