Note: The The 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 Additional attributesIn addition to the attributes common to all nameThis is actually one of the common attributes, but it has a special meaning available for hidden inputs. Normally, the 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 contentOne 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:
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 securityHidden 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. ValidationHidden inputs don't participate in constraint validation; they have no real value to be constrained. ExamplesLet'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 little bit like this:
Let's also add some simple CSS:
The server would set the value of the hidden input with the ID " The output looks like this: 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. Specifications
Browser compatibilityBCD tables only load in the browser See alsoHow do you hide a label in CSS?Hiding the label with display: none; is bad for web accesibility and you shouldn't do it. Try visibility: hidden; instead. yep, why I added a label I didn't want to see in the first place. display: block; height: 0; visibility: hidden; .
Can you disable a label?A label can't be disabled. One of the effects it has is to extend the click target of a form control, so you probably want to disable the form control instead. However, for some reason, all your labels are associated with the same control (the one with id="u" ), which suggests that you aren't using <label> correctly.
How do you edit labels in HTML?Option label Property. Change the label value of an option in a drop-down list: getElementById("myOption"). label = "newLabel";. Return the label value of an option in a drop-down list: getElementById("myOption"). label;. Alert the label value of the selected option in a drop-down list: getElementById("mySelect").. What is Label control in HTML?The <label> tag in HTML is used to provide a usability improvement for mouse users i.e, if a user clicks on the text within the <label> element, it toggles the control. The <label> tag defines the label for <button>, <input>, <meter>, <output>, <progress>, <select>, or <textarea> element.
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