Css input not visible

visibility

The visibility CSS property shows or hides an element without changing the layout of a document. The property can also hide rows or columns in a .

Try it

To both hide an element and remove it from the document layout, set the display property to none instead of using visibility .

Syntax

/* Keyword values */ visibility: visible; visibility: hidden; visibility: collapse; /* Global values */ visibility: inherit; visibility: initial; visibility: revert; visibility: revert-layer; visibility: unset; 

The visibility property is specified as one of the keyword values listed below.

Values

The element box is visible.

The element box is invisible (not drawn), but still affects layout as normal. Descendants of the element will be visible if they have visibility set to visible . The element cannot receive focus (such as when navigating through tab indexes).

The collapse keyword has different effects for different elements:

• For rows, columns, column groups, and row groups, the row(s) or column(s) are hidden and the space they would have occupied is removed (as if display : none were applied to the column/row of the table). However, the size of other rows and columns is still calculated as though the cells in the collapsed row(s) or column(s) are present. This value allows for the fast removal of a row or column from a table without forcing the recalculation of widths and heights for the entire table.
• Collapsed flex items and ruby annotations are hidden, and the space they would have occupied is removed.
• For other elements, collapse is treated the same as hidden .

Accessibility concerns

Using a visibility value of hidden on an element will remove it from the accessibility tree. This will cause the element and all its descendant elements to no longer be announced by screen reading technology.

Interpolation

When animated, visibility values are interpolated between visible and not-visible. One of the start or ending values must therefore be visible or no interpolation can happen. The value is interpolated as a discrete step, where values of the easing function between 0 and 1 map to visible and other values of the easing function (which occur only at the start/end of the transition or as a result of cubic-bezier() functions with y values outside of [0, 1]) map to the closer endpoint.

Notes

• Support for visibility: collapse is missing or partially incorrect in some modern browsers. It may not be correctly treated like visibility: hidden on elements other than table rows and columns.
• visibility: collapse may change the layout of a table if the table has nested tables within the cells that are collapsed, unless visibility: visible is specified explicitly on nested tables.

Formal definition

Formal syntax

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Css input not visible

Note: The input and change events do not apply to this input type. Hidden inputs cannot be focused even using JavaScript (e.g. hiddenInput.focus() ).

Value

The element’s value attribute holds a string that contains the hidden data you want to include when the form is submitted to the server. This specifically can’t be edited or seen by the user via the user interface, although you could edit the value via browser developer tools.

Warning: While the value isn’t displayed to the user in the page’s content, it is visible—and can be edited—using any browser’s developer tools or «View Source» functionality. Do not rely on hidden inputs as a form of security.

Additional attributes

name

This is actually one of the common attributes, but it has a special meaning available for hidden inputs. Normally, the name attribute functions on hidden inputs just like on any other input. However, when the form is submitted, a hidden input whose name is set to _charset_ will automatically be reported with the value set to the character encoding used to submit the form.

Using hidden inputs

As mentioned above, hidden inputs can be used anywhere that you want to include data the user can’t see or edit along with the form when it’s submitted to the server. Let’s look at some examples that illustrate its use.

Tracking edited content

One of the most common uses for hidden inputs is to keep track of what database record needs to be updated when an edit form is submitted. A typical workflow looks like this:

1. User decides to edit some content they have control over, such as a blog post, or a product entry. They get started by pressing the edit button.
2. The content to be edited is taken from the database and loaded into an HTML form to allow the user to make changes.
3. After editing, the user submits the form, and the updated data is sent back to the server to be updated in the database.

The idea here is that during step 2, the ID of the record being updated is kept in a hidden input. When the form is submitted in step 3, the ID is automatically sent back to the server with the record content. The ID lets the site’s server-side component know exactly which record needs to be updated with the submitted data.

You can see a full example of what this might look like in the Examples section below.

Improving website security

Hidden inputs are also used to store and submit security tokens or secrets, for the purposes of improving website security. The basic idea is that if a user is filling in a sensitive form, such as a form on their banking website to transfer some money to another account, the secret they would be provided with would prove that they are who they say they are, and that they are using the correct form to submit the transfer request.

This would stop a malicious user from creating a fake form, pretending to be a bank, and emailing the form to unsuspecting users to trick them into transferring money to the wrong place. This kind of attack is called a Cross Site Request Forgery (CSRF); pretty much any reputable server-side framework uses hidden secrets to prevent such attacks.

Note: Placing the secret in a hidden input doesn’t inherently make it secure. The key’s composition and encoding would do that. The value of the hidden input is that it keeps the secret associated with the data and automatically includes it when the form is sent to the server. You need to use well-designed secrets to actually secure your website.

Validation

Hidden inputs don’t participate in constraint validation; they have no real value to be constrained.

Examples

Let’s look at how we might implement a simple version of the edit form we described earlier (see Tracking edited content), using a hidden input to remember the ID of the record being edited.

The edit form’s HTML might look a bit like this:

form> div> label for="title">Post title:label> input type="text" id="title" name="title" value="My excellent blog post" /> div> div> label for="content">Post content:label> textarea id="content" name="content" cols="60" rows="5"> This is the content of my excellent blog post. I hope you enjoy it! textarea> div> div> button type="submit">Update postbutton> div> input type="hidden" id="postId" name="postId" value="34657" /> form> 

Let’s also add some simple CSS:

html  font-family: sans-serif; > form  width: 500px; > div  display: flex; margin-bottom: 10px; > label  flex: 2; line-height: 2; text-align: right; padding-right: 20px; > input, textarea  flex: 7; font-family: sans-serif; font-size: 1.1rem; padding: 5px; > textarea  height: 60px; > 

The server would set the value of the hidden input with the ID » postID » to the ID of the post in its database before sending the form to the user’s browser and would use that information when the form is returned to know which database record to update with modified information. No scripting is needed in the content to handle this.

The output looks like this:

Note: You can also find the example on GitHub (see the source code, and also see it running live).

When submitted, the form data sent to the server will look something like this:

Even though the hidden input cannot be seen at all, its data is still submitted.

Technical summary

Specifications

Browser compatibility

BCD tables only load in the browser

See also

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This page was last modified on Mar 13, 2023 by MDN contributors.

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How to Disable an Input Field Using CSS?

The input field is used to make forms and take input from the user. Users can fill the input field according to the input type. But sometimes, you must disable the input field to fulfil any precondition, such as selecting a checkbox. In that situation, you need to disable the input field.

In this guide, we will gain an understanding of how to disable the input field using CSS. So, Let’s begin!

How to Disable an Input Field Using CSS?

In CSS, events are disabled by using the “pointer-events” property. So, first, learn about the pointer-events property.

What is “pointer-events” CSS Property?

The “pointer-events” control how the HTML elements respond or behave to the touch event, such as click or tap events, active or hover states, and whether the cursor is visible or not.

Syntax
The syntax of pointer-events is given as follows:

The above mention property takes two values, such as “auto” and “none”:

• auto: It is used to perform default events.
• none: It is utilized to disable events.

Head towards the given example.

Example 1: Adding an Input Field Using CSS

In this example, firstly, we will create a div and add a heading and input field to it. Then, set the input type as “text” and set its value as “Enter Your Name”.

After that, move to the CSS and style the div by setting its background color as “rgb(184, 146, 99)” and height as “150px”.

The output of the above-described code is given below. Here, we can see that our input field is currently active and is accepting the input from the user:

Now, move to the next part in which we use the value of the “pointer-events” property as “none”.

Example 2: Disabling an Input Field Using CSS

We will now use “input” to access the element added in the HTML file and set the value of pointer-events as “none”:

Once you implement the above-stated property “pointer-events” with “none” value, the text of the input field will be non-editable which indicates that our input field is disabled:

That’s it! We have explained the method of disabling the input field using CSS.

Conclusion

To disable an input field in an HTML, the “pointer-events” property of the CSS is used. To do so, add an input field, and set the value of pointer-events as “none” to disable the input field. In this guide, we explain the method of disabling an input field using CSS and provide an example of it.

About the author

Sharqa Hameed

I am a Linux enthusiast, I love to read Every Linux blog on the internet. I hold masters degree in computer science and am passionate about learning and teaching.

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Как использовать input type hidden

С помощью input type hidden разработчики веб-форм могут хранить и отправлять информацию, скрытую от пользователей.

Скрытые поля можно использовать для сохранения текущего состояния многостраничных форм, собирать cookie-файлы для отправки вместе с формой, а также хранить данные, которые не вводятся пользователем.

Это может быть как неизменяемая информация, так и данные, генерируемые с помощью JavaScript , о которых пользователь может и не подозревать ( например, время загрузки формы ).

Примечание : Не забывайте, что скрытые поля нельзя назвать полностью скрытыми — они просто недоступны большинству пользователей, но легко просматриваются в исходном коде страницы. Поэтому никогда не храните в них пароли или другие конфиденциальные данные.

Пример использования input type hidden

Синтаксис использования input type hidden должен соответствовать строке, выделенной в коде, приведенном ниже в качестве примера:

Как видно из примера, мы сохраняем в скрытом поле значение страны “ US ”, поэтому, когда пользователь отправит форму, мы будем знать, что он из США. Разумеется, эти данные можно поменять на другие, изменив HTML-код .

Можно использовать input type hidden для хранения даты и времени ( в примере это сделано с помощью MySQL ):

В PHP можно воспользоваться следующим методом:

МК Михаил Кузнецов автор-переводчик статьи « How to Use the «hidden» HTML INPUT Tag »

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