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The HTMLSelectElement.disabled Is a Boolean that reflects the disabled HTML attribute, which indicates whether the control is disabled. If it is disabled, it does not accept clicks. A disabled element is unusable and un-clickable.
API HTML DOM HTMLSelectElement Property


The RadioNodeList interface represents a collection of elements in a <form> or a <fieldset> element.
API HTML DOM Interface RadioNodeList

Writing a WebSocket server in Java

This example shows you how to create a WebSocket API server using Oracle Java.

Although other server-side languages can be used to create a WebSocker server, this example uses Oracle Java to simplify the example code.
Handshaking HTML5 NeedsMarkupWork Tutorial WebSockets


The WindowBase64 helper contains utility methods to convert data to and from base64, a binary-to-text encoding scheme. For example it is used in data URIs.
API Helper HTML-DOM WindowBase64

HTML attribute reference

Elements in HTML have attributes; these are additional values that configure the elements or adjust their behavior in various ways to meet the criteria the users want.
Attribute HTML Reference Référence Web

HTML element reference

This page lists all the HTML elements. They are grouped by function to help you find what you have in mind easily. Although this guide is written for those who are newer to coding, we intend it to be useful for anyone.
Basic Element HTML Reference Web

<input type="button">

The HTML <input type="button"> element is a specific version of the <input> element used to create a clickable button with no default value. It has been superseded in HTML5 by the <button> element.
Element HTML Input Element Reference


The HTML <marquee> element is used to insert a scrolling area of text.
Element HTML Obsolete Reference Web


The HTML <multicol> element was an experimental element designed to allow multi-column layouts. It never got any significant traction and is not implemented in any major browsers.
Deprecated Experimental HTML Non-standard


The HTML <shadow> element is used as a shadow DOM insertion point. You might use it if you have created multiple shadow roots under a shadow host. It is not useful in ordinary HTML. It is used with Web Components.
Element HTML Reference Web Components

Global attributes

Global attributes may be specified on all HTML elements, even those not specified in the standard. That means that any non-standard elements must still permit these attributes, even though using those elements means that the document is no longer HTML5-compliant. For example, HTML5-compliant browsers hide content marked as <foo hidden>...<foo>, even though <foo> is not a valid HTML element.
Attribute HTML NeedsBrowserCompatibility Reference Web


The accesskey global attribute provides a hint for generating a keyboard shortcut for the current element. This attribute consists of a space-separated list of characters (one single Unicode code point). The browser uses the first one that exists on the computer keyboard layout.
Global attributes HTML Reference Référence


The contenteditable global attribute is an enumerated attribute indicating if the element should be editable by the user. If so, the browser modifies its widget to allow editing. The attribute must take one of the following values:
Global attributes HTML Reference Référence


The data-* global attributes form a class of attributes, called custom data attributes, allows proprietary information to be exchanged between the HTML and its DOM representation that may be used by scripts. All such custom data are available via the HTMLElement interface of the element the attribute is set on. The HTMLElement.dataset property gives access to them.
The * may be replaced by any name following the production rule of xml names with the following restrictions:
Global attributes HTML Reference Référence


The dir global attribute is an enumerated attribute indicates the directionality of the element's text. It can have the following values:
Global attributes HTML Reference Référence


The hidden global attribute is a Boolean attribute indicating that the element is not yet, or is no longer, relevant. For example, it can be used to hide elements of the page that can't be used until the login process has been completed. Browsers won't render elements with the hidden attribute set.
Global attributes HTML Reference Référence


The itemprop global attribute is used to add properties to an item. Every HTML element can have an itemprop attribute specified, and an itemprop consists of a name-value pair. Each name-value pair is called a property, and a group of one or more properties forms an item. Property values are either a string or a URL and can be associated with a very wide range of elements including <audio><embed><iframe><img><link><object><source> , <track>, and <video>.
Attribute Global attribute HTML Reference


Note: The maximum value for tabIndex should not exceed 32767 per W3C section 17.11.1
Global attributes HTML Reference Référence


The title global attribute contains a text representing advisory information related to the element it belongs to. Such information can typically, but not necessarily, be presented to the user as a tooltip. Here are some typical uses of this attribute:
Global attributes HTML Reference Référence