The Document method getElementById() returns an Element object representing the element whose id property matches the specified string. Since element IDs are required to be unique if specified, ...

Moreover, HTML DOM helps us to understand and control the elements structures using the JavaScript methods. If you understand the DOM structure of an HTML page, you can easily control its elements, ...

Document Object Model (DOM ... elements and their contents. When JavaScript accesses an HTML document, it treats the elements of the document as objects that have both attributes (data or properties) ...

For para1 : The Document Object Model (DOM) is a cross-platform and language-independent interface that treats an XML or HTML document as a tree structure. For para2: The Document Object Model (DOM) ...