What are the 5 CSS selector types?
CSS Selectors
- Simple selectors (select elements based on name, id, class)
- Combinator selectors (select elements based on a specific relationship between them)
- Pseudo-class selectors (select elements based on a certain state)
- Pseudo-elements selectors (select and style a part of an element)
What are the selectors in CSS3?
CSS3/Selectors
- Type Selector.
- Universal Selector.
- Attribute Selector.
- Class Selector.
- ID Selector.
- Pseudo-classes. Dynamic pseudo-classes. The target pseudo-class. The language pseudo-class. The UI element states pseudo-classes.
- Pseudo-elements.
- Combinators. Descendant combinator. Child combinators. Adjacent sibling combinator.
What is the use of * In attribute selector?
CSS [attribute*=”value”] Selector You can use the *= operator to make an attribute selector matches all elements whose attribute value contains a specified value.
What does a class selector start with?
period
The class selector is a way to select all of the elements with the specified class name, and apply styles to each of the matching elements. The selector must start with a period ( . ) and then the class name. The browser will look for all tags in the page that have a class attribute containing that class name.
What are the 3 ways to insert a CSS?
There are three ways of inserting a style sheet: external, internal, and inline. The browser will read the style definitions from the file myexternalstyle. css, and apply the formatting to the pages linked to it accordingly. An internal style sheet should be used when a single document has a unique style.
How many selectors are there in CSS?
CSS Selectors allow us to target specific HTML elements with our style sheets. While there are many different types of CSS Selectors, today’s lesson focuses on the four essential selectors; Type, ID, Class and Descendant selectors.
What are the new features of CSS3?
Overview of New Features
- Box Shadow. One of the CSS3 new features is the box-shadow property that adds a shadow to an element.
- Opacity. One of the CSS3 properties called opacity makes elements see-through or completely transparent.
- Rounded Corners.
- Attribute Selectors.
- New Colors.
- More than Web-Safe Fonts.
What is a class selector?
class selector is used to select all elements which belong to a particular class attribute. In order to select the elements with a particular class, use the period (.) character specifying the class name ie., it will match the HTML element based on the contents of their class attribute.
What does line height 1.5 mean?
line-height: 1.5 (without units) will mutiply the element’s font size by 1.5 to compute the line height. line-height: 150% will take 150% of the element’s computed font size to compute the line height, which is equivalent to multiply it by 1.5 .
What is CSS attribute selector?
The CSS attribute selector matches elements based on the presence or value of a given attribute.
What CSS selector begins with a period?
Class Selectors Match an element that has the specified class. To match a specific class attribute, we always start the selector with a period, to signify that we are looking for a class value. The period is followed by the class attribute value we want to match.
What is the Z index in CSS?
Z Index ( z-index ) is a CSS property that defines the order of overlapping HTML elements. Elements with a higher index will be placed on top of elements with a lower index. Note: Z index only works on positioned elements ( position:absolute , position:relative , or position:fixed ).
How is the attribute selector used in CSS?
CSS [attribute|=”value”] Selector. The [attribute|=”value”] selector is used to select elements with the specified attribute starting with the specified value. The following example selects all elements with a class attribute value that begins with “top”:
How are attributes selected in a HTML element?
The most basic selection is by tag name, like p { }. Almost anything more specific than a tag selector uses attributes — class and ID both select on those attributes on HTML elements. But class and ID aren’t the only attributes developers can select. We can use any of an element’s attributes as selectors.
What does the value of attR mean in CSS?
[attr$=value] Represents elements with an attribute name of attr whose value is suffixed (followed) by value. [attr*=value] Represents elements with an attribute name of attr whose value contains at least one occurrence of value within the string.
Can you select attributes from a tag selector?
Almost anything more specific than a tag selector uses attributes — class and ID both select on those attributes on HTML elements. But class and ID aren’t the only attributes developers can select.