Browser Object Model

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Dynamic HTML HTML5 article audio canvas video XHTML Basic Mobile Profile HTML element meta div and span blink marquee HTML attribute alt attribute HTML frame HTML editor Character encodings named characters Unicode Language code Document Object Model Browser Object Model Style sheets CSS Font family Web colors JavaScript WebCL HTMX Web3D WebGL WebGPU WebXR W3C Validator WHATWG Quirks mode Web storage Rendering engine
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The Browser Object Model (BOM) is a browser-specific convention referring to all the objects exposed by the web browser. Unlike the Document Object Model, there is no standard for implementation and no strict definition, so browser vendors are free to implement the BOM in any way they wish.

That which we see as a window displaying a document, the browser program sees as a hierarchical collection of objects. When the browser parses a document, it creates a collection of objects that define the document and detail how it should be displayed. The object the browser creates is known as the Document Object Model (DOM). It is part of a larger collection of objects that the browser makes use of. This collection of browser objects is collectively known as the Browser Object Model, or BOM.

The top level of the hierarchy is the window object, which contains the information about the window displaying the document. Some of its fields are objects themselves that describe the document and related information.

References

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