CSS Selectors
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Questions and Answers

What type of selector is #header?

  • Element Selector
  • Attribute Selector
  • ID Selector (correct)
  • Class Selector

    • What is the purpose of the grid-template-columns property?

  • To define the number of rows in a grid
  • To change the background color of a grid
  • To add space between grid cells
  • To define the structure of a grid (correct)

    • What is the unit rem relative to?

  • The height of the viewport
  • The font size of the root element (correct)
  • The font size of the parent element
  • The width of the viewport

    • What is the purpose of a media query in responsive design?

    <p>To add styles for different screen sizes</p> Signup and view all the answers

    What is the fr unit used for in a grid?

    <p>To define a fractional unit in a grid</p> Signup and view all the answers

    What is the orientation property used for in a media query?

    <p>To specify the orientation of a screen</p> Signup and view all the answers

    Seçici növü hansıdır?

    <p>ID Seçici</p> Signup and view all the answers

    Layout Xüsusiyyətinin növləri hansılardır?

    <p>Width, Height, Margin, Padding</p> Signup and view all the answers

    Flexbox konteynerinin hansı xüsusiyyəti, elementlərin sıra sırada yerləşməsini müəyyən edir?

    <p>flex-direction</p> Signup and view all the answers

    Flexbox iteminin hansı xüsusiyyəti, elementlərin böyüməsini müəyyən edir?

    <p>flex-grow</p> Signup and view all the answers

    Hansı selektor, attribute-ə əsasən seçim edir?

    <p>Attribute Seçici</p> Signup and view all the answers

    Hansı xüsusiyyət, rəng və font ölçüsünü müəyyən edir?

    <p>Visual Xüsusiyyəti</p> Signup and view all the answers

    Flexbox-də istifadə olunmuş elementlərin tərəfləri necə müəyyən edilir?

    <p>Flexbox konteyneri üzərindəki flex-basis xüsusiyyəti</p> Signup and view all the answers

    Responsive dizaynda media queries necə işlədilir?

    <p>Different screen sizes üçün stil müəyyən etmək üçün</p> Signup and view all the answers

    Grid konteynerinin xüsusiyyətləri hansılardır?

    <p>display: grid, grid-template-columns: repeat(3, 1fr)</p> Signup and view all the answers

    Grid itemlərinin sütun və sətrlərinin müəyyən edilməsi necə həyata keçirilir?

    <p>grid-column və grid-row xüsusiyyətləri ilə</p> Signup and view all the answers

    Common breakpoints hansılardır?

    <p>320px, 480px, 768px, 1024px, 1280px</p> Signup and view all the answers

    Study Notes

    Selectors

    • Types of Selectors:
      • Element Selectors (e.g. p, h1, div)
      • ID Selectors (e.g. #header)
      • Class Selectors (e.g. .header)
      • Attribute Selectors (e.g. [hreflang="en"])
      • Combinators (e.g. div &gt; p, div p)
      • Pseudo-Classes (e.g. :hover, :first-child)
      • Pseudo-Elements (e.g. ::before, ::after)
    • Selector Combinators:
      • &gt; (child combinator)
      • (descendant combinator)
      • + (adjacent sibling combinator)
      • ~ (general sibling combinator)

    Properties

    • Common Properties:
      • color (text color)
      • background-color (background color)
      • font-size (font size)
      • padding (padding)
      • margin (margin)
      • border (border)
      • width and height (element dimensions)
    • CSS Units:
      • px (pixels)
      • % (percentage)
      • em (relative to font size)
      • rem (relative to root element)
      • vw and vh (relative to viewport)

    Grid

    • Grid Container:
      • display: grid or display: inline-grid
      • grid-template-columns and grid-template-rows (define grid structure)
    • Grid Items:
      • grid-column and grid-row (place items on the grid)
      • grid-area (assign items to grid areas)
    • Grid Units:
      • fr (fractional unit)
      • auto (automatic grid size)

    Responsive Design

    • Media Queries:
      • @media (define media query)
      • max-width and min-width (set breakpoints)
      • orientation (portrait or landscape)
    • Responsive Units:
      • vw and vh (relative to viewport)
      • % (percentage)
      • em and rem (relative to font size)
    • Mobile-First Design:
      • Start with small screen sizes and add styles as screen size increases
      • Use min-width media queries to add styles for larger screens

    Selectors

    • There are various types of selectors, including Element, ID, Class, Attribute, Combinators, Pseudo-Classes, and Pseudo-Elements.
    • Element Selectors target specific HTML elements, such as p, h1, or div.
    • ID Selectors target specific elements with a unique ID, such as #header.
    • Class Selectors target elements with a specific class, such as .header.
    • Attribute Selectors target elements with specific attributes, such as [hreflang="en"].
    • Combinators combine multiple selectors, such as div &gt; p or div p.
    • Pseudo-Classes target specific states or positions, such as :hover or :first-child.
    • Pseudo-Elements target specific parts of an element, such as ::before or ::after.

    Selector Combinators

    • The &gt; combinator targets child elements.
    • The (space) combinator targets descendant elements.
    • The + combinator targets adjacent sibling elements.
    • The ~ combinator targets general sibling elements.

    Properties

    • color sets the text color.
    • background-color sets the background color.
    • font-size sets the font size.
    • padding sets the padding.
    • margin sets the margin.
    • border sets the border.
    • width and height set the element dimensions.

    CSS Units

    • px represents pixels.
    • % represents a percentage.
    • em represents a relative unit to the font size.
    • rem represents a relative unit to the root element.
    • vw and vh represent relative units to the viewport.

    Grid

    • A Grid Container is created with display: grid or display: inline-grid.
    • grid-template-columns and grid-template-rows define the grid structure.
    • Grid Items can be placed on the grid using grid-column and grid-row.
    • grid-area assigns items to grid areas.

    Grid Units

    • fr represents a fractional unit.
    • auto sets the grid size to automatic.

    Responsive Design

    • Media Queries are defined with @media.
    • max-width and min-width set breakpoints.
    • orientation targets portrait or landscape orientation.
    • vw and vh represent relative units to the viewport.
    • % represents a percentage.
    • em and rem represent relative units to the font size.
    • Mobile-First Design involves starting with small screen sizes and adding styles as screen size increases.
    • min-width media queries add styles for larger screens.

    Selectors

    • There are six types of selectors: Element, Class, ID, Attribute, Pseudo-Classes, and Pseudo-Elements.
    • Element Selectors target HTML elements (e.g. h1, p, div).
    • Class Selectors target HTML elements with a specific class (e.g. .header, .footer).
    • ID Selectors target HTML elements with a specific ID (e.g. #header, #footer).
    • Attribute Selectors target HTML elements with a specific attribute (e.g. [hreflang="en"], [type="submit"]).
    • Pseudo-Classes target HTML elements based on their state (e.g. :hover, :active, :focus).
    • Pseudo-Elements target HTML elements that are not part of the document tree (e.g. ::before, ::after).

    Selector Combinators

    • There are four types of selector combinators: Descendant, Child, Adjacent Sibling, and General Sibling.
    • Descendant Combinator targets elements that are descendants of another element (e.g. div p).
    • Child Combinator targets elements that are direct children of another element (e.g. div &gt; p).
    • Adjacent Sibling Combinator targets elements that immediately follow another element (e.g. h1 + p).
    • General Sibling Combinator targets elements that are siblings of another element (e.g. h1 ~ p).

    Properties

    • There are four types of properties: Layout, Visual, Text, and Other.
    • Layout Properties control the layout of elements (e.g. width, height, margin, padding).
    • Visual Properties control the visual styling of elements (e.g. color, background-color, font-size, font-family).
    • Text Properties control the text styling of elements (e.g. text-align, text-decoration, text-transform).
    • Other Properties control miscellaneous styling of elements (e.g. opacity, cursor, box-shadow).

    Property Values

    • There are three types of property values: Length, Color, and Keyword.
    • Length Units are used to specify lengths (e.g. px, em, %, vw, vh).
    • Color Values are used to specify colors (e.g. hex, rgb, rgba, hsl, hsla).
    • Keyword Values are used to specify specific keywords (e.g. auto, none, inherit, initial).

    Flexbox

    • Flexbox Container Properties control the layout of flex containers.
    • display: flex or display: inline-flex enables flexbox layout.
    • flex-direction controls the direction of the flex container (e.g. row, column, row-reverse, column-reverse).
    • flex-wrap controls whether the flex items wrap to a new line (e.g. wrap, nowrap).
    • justify-content controls the alignment of flex items (e.g. flex-start, center, space-between, space-around).
    • align-items controls the alignment of flex items (e.g. flex-start, center, baseline, stretch).
    • Flexbox Item Properties control the layout of flex items.
    • flex-grow controls the flexibility of flex items (e.g. 0, 1, 2).
    • flex-shrink controls the shrinkability of flex items (e.g. 0, 1, 2).
    • flex-basis controls the initial main size of flex items (e.g. auto, 100px, 20%).

    Responsive Design

    • Responsive Design Techniques include Media Queries, Mobile-First Design, Responsive Images, and Flexible Grids.
    • Media Queries specify different styles for different screen sizes (e.g. @media (max-width: 768px)).
    • Common Breakpoints include 320px, 480px, 768px, 1024px, and 1280px.

    Grid

    • Grid Container Properties control the layout of grid containers.
    • display: grid or display: inline-grid enables grid layout.
    • grid-template-columns controls the number of columns and their widths (e.g. repeat(3, 1fr), 100px 200px 300px).
    • grid-template-rows controls the number of rows and their heights (e.g. repeat(2, 1fr), 100px 200px).
    • grid-gap controls the gap between grid cells (e.g. 10px, 20px 10px).
    • Grid Item Properties control the layout of grid items.
    • grid-column controls the column placement of grid items (e.g. 1 / 3, span 2).
    • grid-row controls the row placement of grid items (e.g. 1 / 3, span 2).
    • grid-area controls the placement of grid items in a grid area (e.g. header, nav, main).

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    Test your knowledge of different types of selectors and combinators in CSS, including element, ID, class, and attribute selectors, and more.

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