1.What is dom?
Dom stands for
D - Document
O - Object
M - Model
Dom is a programming interface for html documents.It represents the page as a tree of objects,so JavaScript can manipulate structure, style, and content dynamically.
2.What is difference between dom and html?
DOM
Dom is a tree-like object model.Represents the current state for interaction.Dynamic; it updates in real-time.Manipulated by JavaScript to change the page.
HTML
Html is a markup language.Defines the initial structure and content.Static; it doesn't change once sent.Written by developers, read by browsers.
3.what is difference betweenand getelementbyid and queryselector?
getelementbyid:
Only ID strings (e.g., 'myID').Single element matching the ID.Faster directly accesses the element by ID.Faster; directly accesses the element by ID.
queryselector
Any CSS selector (e.g., '#myID', '.myClass', 'div > p').The first element matching the selector.Slightly slower must parse CSS selectors.Available on document and any individual element.
4.How to change the content of HTML elements
output
after click
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