Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.
Вивчайте ID Selectors | Selecting and Targeting Elements
CSS Foundations

bookID Selectors

index.html

index.html

style.css

style.css

copy

An ID selector in CSS allows you to target a single, unique element on your page. To use an ID selector, add an id attribute to an HTML element, then reference that ID in your CSS by prefixing it with a hash (#). For example, if an element has id="main-title", you select it in CSS with #main-title.

Each ID value must be unique within a page—no two elements should share the same ID. This uniqueness helps ensure that the styles you apply with an ID selector affect only the intended element. ID selectors are commonly used for elements that need a specific, one-off style or for elements you want to reference directly in scripts or navigation.

question mark

Which of the following is the correct syntax for selecting an element with the ID "header" in CSS?

Select the correct answer

Все було зрозуміло?

Як ми можемо покращити це?

Дякуємо за ваш відгук!

Секція 2. Розділ 3

Запитати АІ

expand

Запитати АІ

ChatGPT

Запитайте про що завгодно або спробуйте одне із запропонованих запитань, щоб почати наш чат

Awesome!

Completion rate improved to 6.67

bookID Selectors

Свайпніть щоб показати меню

index.html

index.html

style.css

style.css

copy

An ID selector in CSS allows you to target a single, unique element on your page. To use an ID selector, add an id attribute to an HTML element, then reference that ID in your CSS by prefixing it with a hash (#). For example, if an element has id="main-title", you select it in CSS with #main-title.

Each ID value must be unique within a page—no two elements should share the same ID. This uniqueness helps ensure that the styles you apply with an ID selector affect only the intended element. ID selectors are commonly used for elements that need a specific, one-off style or for elements you want to reference directly in scripts or navigation.

question mark

Which of the following is the correct syntax for selecting an element with the ID "header" in CSS?

Select the correct answer

Все було зрозуміло?

Як ми можемо покращити це?

Дякуємо за ваш відгук!

Секція 2. Розділ 3
some-alt