ID Selectors

We have learned that in CSS, selectors select elements from DOM and then apply style rules as specified for them. These selectors can be of various types, and one of them is an id selector that is used to select and style a single element on a web page. It is identified by the # symbol followed by the unique id attribute of the element. Here is an example of using an id selector in CSS:

css

index.html

index.css

In this example, the <div> element has an id attribute of the "header", so it will be styled according to the rules defined in the #header selector in the CSS.

You can also use the id selector in combination with other selectors to create more specific rules. For example:

css

index.html

index.css

In this example, the #header h1 selector selects all h1 elements that are descendants of an element with the id attribute of "header". This allows you to apply styles specifically to the h1 elements within the "header" element.

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Sektion 2. Kapitel 1

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Kursusindhold

Introduction to CSS Part I

1. Basic Introduction

CSS Including CSS: Internal Styles Including CSS: External Styles Including CSS: Inline Styles Basic Syntax of CSS Basic Selection in CSS Commonly Used Basic CSS Properties Challenge

2. Selectors and Cascade

ID Selectors Class Selectors Other Selectors Cascade in CSS Inheritance Specificity Manipulate Cascade, Specificity and Inheritance Challenge

3. Box Model

Box Model Properties Sizing Elements Positioning Elements

ID Selectors

css

index.html

index.css

In this example, the <div> element has an id attribute of the "header", so it will be styled according to the rules defined in the #header selector in the CSS.

You can also use the id selector in combination with other selectors to create more specific rules. For example:

css

index.html

index.css

Var alt klart?

Tak for dine kommentarer!

Sektion 2. Kapitel 1