what is the DOM ?
DOM-Document Object Model.
The Document Object Model (DOM) in JavaScript is a programming interface for HTML and XML documents. It represents the structure of a document as a logical tree, where each part of the document (elements, attributes, text, etc.) is represented as a "node" or "object."
what is the queryselector() ?
JavaScript method used to select the first HTML element within the document that matches a specified CSS selector or group of selectors. It is a powerful tool for DOM manipulation, allowing developers to access and modify elements based on their tag name, class, ID, or any other valid CSS selector.
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