T is constrained to another base interface Node. For example in the following HTML, the p tags are children of the div element. The childNodes property will return a similar NodeList list of nodes. See how both lists change. Both of these methods are great tools for getting lists of dom elements that fit a more unique set of constraints. They are defined in lib.
This return type is essentially a custom implementation of the standard JavaScript list element. Additionally, this method returns a list of elements , not nodes , which is what NodeList was returning from the. While this may appear as a discrepancy, take note that interface Element extends from Node. The best part about the lib. These pages list all available properties, methods, and sometimes even examples. Another great aspect of the pages is that they provide links to the corresponding standard documents.
For example, the browser might fire this event when the user presses the Esc key or clicks a "Close dialog" button which is part of the browser's UI.
Also available via the oncancel property. Fired when a resource failed to load, or can't be used. For example, if a script has an execution error or an image can't be found or is invalid. Also available via the onerror property. Fired when the document view or an element has been scrolled. Also available via the onscroll property. Fired when some text has been selected. Also available via the onselect property. Also available via the onshow property. Fired when the user rotates a wheel button on a pointing device typically a mouse.
Also available via the onwheel property. Fired when a Content Security Policy is violated. Also available via the global onsecuritypolicyviolation property, which available on elements and the Document and Window objects.
Fired when the user initiates a copy action through the browser's user interface. Also available via the oncopy property. Fired when the user initiates a cut action through the browser's user interface. Also available via the oncut property. Fired when the user initiates a paste action through the browser's user interface.
Also available via the onpaste property. Fired when a text composition system such as an input method editor completes or cancels the current composition session. Fired when a text composition system such as an input method editor starts a new composition session. Fired when a new character is received in the context of a text composition session controlled by a text composition system such as an input method editor.
Fired when an element has lost focus. Also available via the onblur property. Fired when an element has gained focus. Also available via the onfocus property. Sent to an Element when it transitions into or out of full-screen mode. Also available via the onfullscreenchange property. Sent to an Element if an error occurs while attempting to switch it into or out of full-screen mode.
Also available via the onfullscreenerror property. Fired when a key is pressed. Also available via the onkeydown property. Fired when a key that produces a character value is pressed down. Also available via the onkeypress property. Fired when a key is released. Also available via the onkeyup property. Fired when a non-primary pointing device button e.
Also available via the onauxclick property. Fired when a pointing device button e. Also available via the onclick property. Fired when the user attempts to open a context menu. Also available via the oncontextmenu property. Report Error. Your message has been sent to W3Schools. W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
For greater specificity in checking types, a typeof wrapper for usage in production-level code would be as follows provided obj exists :. Skip to main content Skip to search Skip to select language Web technology for developers JavaScript JavaScript reference Expressions and operators typeof Change language.
The typeof operator is followed by its operand: typeof operand typeof operand. Avoid them. Callable regular expressions were a non-standard addition in some browsers. On IE 6, 7, and 8 a lot of host objects are objects and not functions.
0コメント