Table of contentsBypass table of contents
The HTML button tag inserts a button control in a form or document. Differently from the HTML input element using "button" in the "type" attribute, this button can contain other elements (i.e., HTML code).
Note: The behavior of the interactive content displayed inside an HTML button element varies from browser to rowser.
The "id" attribute assigns an identifier to the associated element. This identifier must be unique in the document and can be used to refer to that element in other instances (e.g., from client-side scripts).
The "class" attribute assigns a class name (or a list of class names separated by spaces) to the container element. It is used together with style sheets and tells the browser the class (or classes) to which the element is associated.
A class gives presentational attributes to elements (read more at the Cascading Style Sheets tutorial).
This attribute is used to define presentational attributes for the containing element, and its value should be composed by style sheets properties. Although in some cases it can become useful, a better practice is to place presentational attributes in external files, relating them to elements with the "class" attribute. This way you keep the semantic and presentational parts of your document separated.
You can find more information about presentational attributes at the Cascading Style Sheets tutorial.
The purpose of this attribute is to provide a title for the element. Its value must be a short and accurate description of the element. Browsers usually render it as a "tool tip" when the user puts the mouse pointer over the element for a short period of time.
Specifies the language of an element's content. The default value is "unknown".
When writing XHTML 1.0 documents, the attribute used to specify the language of an elements is "xml:lang". For forward and backward compatibility both attributes can be used simultaneously as in the example below. Note, that in XHTML 1.1 the "lang" attribute has been completely replaced by "xml:lang" and its use is no longer valid.
This attribute indicates the direction in which the texts of the element must be read. This includes content, attribute values and tables. It has two possible values that are case-insensitive:
This attribute gives a name to the element for future reference. This name will identify the element when the processing agent processes the form.
It can also be used to refer to the element from a client-side script, as a sub-element of the containing form.
Assigns the initial value in a form's control. Depending on the element's nature, this value can be changed later by the user.
This attribute decides the default action of the button. It may have one of these case-insensitive values:
When this attribute is present, the control is disabled. This means than it cannot get the focus, it's value cannot be changed and it won't be submitted with the form. Depending on the browser, disabled elements may be redenred differently.
This is a boolean attribute, which means that can only have two values: true or false. Because of this is commonly used without value (nor the equal sign and the quotes). But when writing correct XHTML code, boolean attributes must be defined with their names for value (bool_attr="bool_attr").
Specifies the position of this element in the tabbing order. The tabbing order defines a sequence with all the elements than can receive the focus. Users can navigate this sequence via keyboard (usually with the "tab" key).
Relates the element to a character key. Most browsers allow users to access the element by pressing that key while holding down the "alt" key. The activation result depends on the element's nature. For links, this action automatically follows the link, while other elements simply get the focus.
See a complete list and information about events in HTML
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