HTML and CSS Reference
In-Depth Information
Events Defined by HTML5
onabort, onblur, oncanplay, oncanplaythrough, onchange, onclick,
oncontextmenu, ondblclick, ondrag, ondragend, ondragenter, ondragleave,
ondragover, ondragstart, ondrop, ondurationchange, onemptied, onended,
onerror, onfocus, onformchange, onforminput, oninput, oninvalid, onkeydown,
onkeypress, onkeyup, onload, onloadeddata, onloadedmetadata, onloadstart,
onmousedown, onmousemove, onmouseout, onmouseover, onmouseup, onmousewheel,
onpause, onplay, onplaying, onprogress, onratechange, onreadystatechange,
onscroll, onseeked, onseeking, onselect, onshow, onstalled, onsubmit,
onsuspend, ontimeupdate, onvolumechange, onwaiting
Events Defined by Internet Explorer
onload, onpropertychange, onreadystatechange
Element-Specific Attributes
async Presence of this HTML5 attribute indicates that the browser might perform the fetch
or execution of the script to be asynchronously from other activity in the page. The meaning
of this attribute versus the defer attribute with remote scripts in particular is quite unclear.
charset This attribute defines the character encoding of the script. The value is a space- and/
or comma-delimited list of character sets as defined in RFC 2045.
defer Presence of this attribute indicates that the browser might defer execution of the
script enclosed by the <script> tag. Support for this attribute is inconsistent, though it is
now part of the HTML5 specification.
event This Microsoft-specific attribute is used to define a particular event that the script
should react to. It must be used in conjunction with the for attribute. Event names are the
same as event handler attributes; for example, onclick , ondblclick , and so on.
for The for attribute is used in Microsoft browsers to define the name or id of the element
to which an event defined by the event attribute is related. For example, <script
event="onclick" for="button1" language="vbscript"> defines a VBScript that will
execute when a click event is issued for an element named button1 .
language This common though nonstandard attribute specifies the scripting language being
used. The Netscape implementation supports JavaScript. The Microsoft implementation
supports JScript (a JavaScript clone) as well as VBScript, which can be indicated by either
vbs or vbscript . Other values that include the version of the language used, such as
JavaScript1.1 and JavaScript1.2 , also might be possible and are useful to exclude
browsers from executing script code that is not supported. The HTML5 specification
indicates that while this attribute may be widely supported it should not be used by page
src This attribute specifies the URL of a file containing scripting code. Typically, files
containing JavaScript code will have a .js extension, and a server will attach the appropriate
MIME type; if not, the type attribute might be used to explicitly set the content type of the
external script file. The language attribute also might be helpful in determining this.
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