Скачать или смотреть Learn DOM Element Selector in JavaScript in less than 10 Minutes! #42

DOM Element Selectors are methods provided by JavaScript to target and interact with elements in an HTML document. These methods allow you to find elements based on their ID, class, tag, or CSS selectors, enabling dynamic manipulation of the webpage.

Key Points:
getElementById(id):

Selects one element by its unique ID.
Example: document.getElementById('header')
getElementsByClassName(className):

Selects multiple elements by class name.
Returns an HTMLCollection (live collection).
Example: document.getElementsByClassName('button')
getElementsByTagName(tagName):

Selects all elements with a specific tag name (e.g., div, p).
Example: document.getElementsByTagName('div')
querySelector(selector):

Selects the first element that matches a CSS selector.
Example: document.querySelector('.content')
querySelectorAll(selector):

Selects all elements that match a CSS selector.
Returns a static NodeList.
Example: document.querySelectorAll('p')
Summary:
getElementById: Single element by ID.
getElementsByClassName & getElementsByTagName: Multiple elements (HTMLCollection).
querySelector & querySelectorAll: CSS selector-based, more flexible (NodeList).

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