DOM Selectors for Single Elements

The video tutorial covers DOM selectors in JavaScript, focusing on single and multiple element selectors. It explains the use of getElementById and querySelector, demonstrating how to manipulate styles and content in the DOM. The tutorial also highlights the inefficiency of repeated DOM access and suggests caching elements in variables. The use of CSS pseudo-classes with querySelector is also discussed.

What are DOM selectors and how do they function in JavaScript?

Explain the difference between single element selectors and multiple element selectors.

What is the purpose of the 'getElementById' method in JavaScript?

How can you change the style of an element using JavaScript?

What is the significance of using 'display: none' in JavaScript?

Explain how to manipulate the content of an element using JavaScript.

What is the difference between 'innerText' and 'innerHTML'?

How can you cache a DOM element in a variable for better performance?

Describe how to use the 'querySelector' method in JavaScript.

What are pseudo-classes in CSS, and how can they be used with JavaScript?