html hidden input

HTML hidden input

When we want to collect information from a form, we usually use the input element. However, sometimes we want certain input elements not to be seen by the user. This could be because we want to reduce clutter, or we need certain values ​​to submit the form, but they don't have to be exposed to the user.

In this case, we can use the hidden input element in HTML. This element will not be displayed in the web page, but it can pass the value when the form is submitted. In this article, we will take a closer look at the HTML hidden input element and how to use it.

Syntax of hidden input elements

HTML hidden input elements are very simple, it looks like this:

<input type="hidden" name="name" value="value">

As you can see, its type is "hidden", which prevents it from being displayed on the web page. value is the value we want to pass. The "name" is the identifier of the value, which we use to refer to the value. Its syntax should be easy to understand, and you can place hidden input elements with other form elements, like this:

<form>
    <label for="name">Name:</label>
    <input type="text" id="name" name="name"><br><br>
    <label for="email">Email:</label>
    <input type="email" id="email" name="email"><br><br>
    <input type="hidden" name="secret" value="password">
    <input type="submit" value="Submit">
</form>

In this example, we have added a hidden input element to the form . However, because it is hidden, it does not show up in the form.

Uses of hidden input elements

If you are still not sure when you need to use hidden input elements, here are some examples:

1. Counter

Sometimes we want to track the number of submissions of a form. Hidden input elements are perfect for this situation. We can easily keep track of the number of form submissions by incrementing its value each time the form is submitted. This is useful in some statistical analysis applications.

2. Identifier

Sometimes we need to pass some identifiers when the form is submitted, but they do not have to be exposed to the user. For example, when you insert data into a database, you may need a unique identifier. This identifier can be passed through a hidden input element.

3. Configuration parameters

Sometimes we need to pass some configuration parameters when the form is submitted, but they do not have to be exposed to the user. For example, on an e-commerce site, you might want to save certain values ​​in your shopping cart, such as a threshold for free shipping or a special offer code. These values ​​can be passed through hidden input elements.

Notes

Although hidden input elements have many uses, you should pay attention to the following points when using them:

1. Do not store sensitive information

Don’t store sensitive information, such as passwords or credit card information, in hidden input elements, even if they won’t be displayed on the web page.

2. Don’t Overuse

Be careful when using hidden input elements as they can convey information without the user’s consent. Make sure you only use them to convey the information you need to convey, and only use them when necessary.

3. Don’t disrupt the user experience

When using hidden input elements, make sure it doesn’t interfere with the user experience. If the user's interaction is related to a hidden input element, make sure the user can complete the operation correctly.

Summary

With the simplicity of HTML's hidden input elements, we can easily add values ​​to the form that don't need to be displayed on the web page. However, we must be careful because hidden input elements can inadvertently convey information. Use them in appropriate situations to make using the form more natural and concise.

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