I have added a script element inside the #shadow-root. The problem is that when the window object is used inside the b2.js file, it still refers to the parent application's window. Is there a way to scope the window object that is used inside the script file to the #shadow-root exclusively.
Example dom:
Related
There are many question i saw on these concept still i have some doubts that's why asking specifically
What is Browser object Model is this any object in javascript if it is how to access that object and what kind of properties it has
someone please clarify exact definition of each
For example window is a global object created by Javascript engine
We can access it by
window
when we say window we get following properties in console
window
Window {speechSynthesis: SpeechSynthesis, caches: CacheStorage, localStorage: Storage, sessionStorage: Storage, webkitStorageInfo: DeprecatedStorageInfo…}
When we say
window.document
#document<html><head>
</head><body>…</body><script src="app.js"></script></body></html>
Similar way what is BOM and DOM
The BOM consists of the objects navigator, history, screen, location and document which are children of window. In the document node is the DOM, the document object model, which represents the contents of the page. You can manipulate it using javascript.
Reference
What is the DOM and BOM in JavaScript?
All browsers are split into different parts (objects) that can be accessed using Javascript. Collectively, these parts are known as the Browser Object Model, or the BOM. At the very top of this browser hierarchy is the Window object. This represents the entire browser, with its toolbars, menus, status bar, the page itself, and a whole lot more besides. Effectively, the Window IS the browser.
Every web page resides inside a browser window which can be considered as an object.
A Document object represents the HTML document that is displayed in that window. The Document object has various properties that refer to other objects which allow access to and modification of document content.
BOM stands for Browser Object Model
DOM stands for Document Object Model
Document is a document object constructor
window is a scripting handle for window object
With Browser Object Model(window Object), you can:
Manipulate the browser window with the window object and things like
scrolling, opening a new window, closing the current window, ..Etc.
Use the object document property to interact with the DOM.
Get the browser history with the history object.
Manipulate the screen with the screen object.
Get and do things with the location object.
With DOM you can:
Change an element text.
Change an HTML element color.
Hide and show elements
Make an HTML elements listen to an event
I have a complex code that travels inside windows and iframes (yes, windows cause I open some windows with window.open sometimes and also travel inside iframes) and when some condition apply I get an element from inside of those iframes (they usually are DIVs and SPANs).
So, I have the element that I want in the object "$(this)" so from the parent window how can I know the "document" element that has this element? I need to get the "document" element that has "$(this)" and set some attributes to it.
I tried $(this).parents(document) but it does not work.
If this refers to an element (such that $(this) would give you a jQuery wrapper around it) or indeed any Node, then this.ownerDocument is a reference to the document the element is in (null if it's not in a document). Details in ownerDocument in the specification.
I embedded console.log(document.body) at my local page for learning purpose and when I hit refresh it displayed properties of body element like baseURL, innerHTML, etc... rather than its
content. Why is this happening? (I am using Chrome43)
In JavaScript and the DOM, document.body is an object, and when you log it with console, Chrome is displaying displaying the object, which includes all of its properties. The content of document.body can be found in the innerHTML property and accessible via other properties as well.
Chrome may be displaying the object properties instead of the DOM tree if there's a race condition and console.log(document.body) is fired prior to the completion of the DOM tree.
If you need the DOM tree, then try logging document.body after the body loads.
document is the root of the DOM, not the same as window, the global browser scope. console.log(document.body); logs the DOM element, not the JavaScript object.
Do we have multiple (different) global objects in a multi-frame frameset HTML?
It's common to use:
if(window.top != window.self) {
alert("We're in a frame");
}
where window is a property of the [[global]] object like self is, and both are references to [[global]] object itself. But, if window.top refers to the topmost window frame object and therefore to the [[global]] object, how many [[global]] objects do we have? Or maybe the window DOM part is changed only?
Each document (therefore each frame) has its own window object.
The window object is not a unique singleton. It's just an instance of Window. One is created for each document, and can be accessed through document.defaultView.
If and only if two pieces of your application share a document, they share a window.
There is no [[global]] object: global scope is just a way of conveniently accessing the current window.
I'm trying to update the innerHTML of a div tag that's within the parent window from within an iframe. How do I access the parent window?
Use window.parent. Note, however, that you can only manipulate the parent document if it belongs to the same domain.