Column-width - CSS: Cascading Style Sheets - MDN Web Docs

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1. References
2. CSS
3. column-width

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• Syntax
• Formal definition
• Formal syntax
• Examples
• Specifications
• Browser compatibility
• See also

1. CSS
2. Tutorials
3. CSS basics
4. CSS first steps
   1. CSS first steps overview
   2. What is CSS?
   3. Getting started with CSS
   4. How CSS is structured
   5. How CSS works
   6. Assessment: Styling a biography page
5. CSS building blocks
   1. CSS building blocks overview
   2. CSS selectors
   3. Type, class, and ID selectors
   4. Attribute selectors
   5. Pseudo-classes and pseudo-elements
   6. Combinators
   7. Cascade, specificity, and inheritance
   8. Cascade layers
   9. The box model
   10. Backgrounds and borders
   11. Handling different text directions
   12. Overflowing content
   13. CSS values and units
   14. Sizing items in CSS
   15. Images, media, and form elements
   16. Styling tables
   17. Debugging CSS
   18. Organizing your CSS
   19. Assessment: Fundamental CSS comprehension
   20. Assessment: Creating fancy letterheaded paper
   21. Assessment: A cool-looking box
6. Styling text
   1. Styling text overview
   2. Fundamental text and font styling
   3. Styling lists
   4. Styling links
   5. Web fonts
   6. Assessment: Typesetting a community school homepage
7. CSS layout
   1. CSS layout overview
   2. Introduction to CSS layout
   3. Normal Flow
   4. Flexbox
   5. Grids
   6. Floats
   7. Positioning
   8. Multiple-column layout
   9. Responsive design
   10. Beginner's guide to media queries
   11. Legacy layout methods
   12. Supporting older browsers
   13. Assessment: Fundamental layout comprehension
8. Reference
9. Modules
   1. CSS anchor positioning
   2. CSS animations
   3. CSS backgrounds and borders
   4. CSS basic user interface
   5. CSS box alignment
   6. CSS box model
   7. CSS box sizing
   8. CSS cascade and inheritance
   9. CSS custom properties for cascading variables
   10. CSS color adjustment
   11. CSS colors
   12. CSS compositing and blending
   13. CSS conditional rules
   14. CSS containment
   15. CSS counter styles
   16. CSS display
   17. CSS filter effects
   18. CSS flexible box layout
   19. CSS font loading
   20. CSS fonts
   21. CSS fragmentation
   22. CSS generated content
   23. CSS grid layout
   24. CSS images
   25. CSS lists and counters
   26. CSS logical properties and values
   27. CSS masking
   28. CSS media queries
   29. CSS miscellaneous
   30. CSS motion path
   31. CSS multi-column layout
   32. CSS namespaces
   33. CSS nesting
   34. CSS overflow
   35. CSS overscroll behavior
   36. CSS paged media
   37. CSS positioned layout
   38. CSS properties and values API
   39. CSS pseudo-elements
   40. CSS ruby layout
   41. CSS scoping
   42. CSS scroll-driven animations
   43. CSS scroll snap
   44. CSS scrollbars styling
   45. CSS selectors
   46. CSS shadow parts
   47. CSS shapes
   48. CSS syntax
   49. CSS table
   50. CSS text
   51. CSS text decoration
   52. CSS transforms
   53. CSS transitions
   54. CSS writing modes
   55. CSSOM view
10. Properties
    1. -moz-*
       1. -moz-float-edge Non-standard Deprecated
       2. -moz-force-broken-image-icon Non-standard Deprecated
       3. -moz-image-region Non-standard
       4. -moz-orient Non-standard
       5. -moz-user-focus Non-standard Deprecated
       6. -moz-user-input Non-standard Deprecated
    2. -webkit-*
       1. -webkit-border-before Non-standard
       2. -webkit-box-reflect Non-standard
       3. -webkit-line-clamp
       4. -webkit-mask-box-image Non-standard
       5. -webkit-mask-composite Non-standard
       6. -webkit-mask-position-x Non-standard
       7. -webkit-mask-position-y Non-standard
       8. -webkit-mask-repeat-x Non-standard
       9. -webkit-mask-repeat-y Non-standard
       10. -webkit-overflow-scrolling Non-standard
       11. -webkit-tap-highlight-color Non-standard
       12. -webkit-text-fill-color
       13. -webkit-text-security Non-standard
       14. -webkit-text-stroke
       15. -webkit-text-stroke-color
       16. -webkit-text-stroke-width
       17. -webkit-touch-callout Non-standard
    3. accent-color
    4. align-*
       1. align-content
       2. align-items
       3. align-self
    5. all
    6. anchor-name Experimental
    7. animation-*
       1. animation
       2. animation-composition
       3. animation-delay
       4. animation-direction
       5. animation-duration
       6. animation-fill-mode
       7. animation-iteration-count
       8. animation-name
       9. animation-play-state
       10. animation-range Experimental
       11. animation-range-end Experimental
       12. animation-range-start Experimental
       13. animation-timeline Experimental
       14. animation-timing-function
    8. appearance
    9. aspect-ratio
    10. backdrop-filter
    11. backface-visibility
    12. background-*
        1. background
        2. background-attachment
        3. background-blend-mode
        4. background-clip
        5. background-color
        6. background-image
        7. background-origin
        8. background-position
        9. background-position-x
        10. background-position-y
        11. background-repeat
        12. background-size
    13. block-size
    14. border-*
        1. border
        2. border-block
        3. border-block-color
        4. border-block-end
        5. border-block-end-color
        6. border-block-end-style
        7. border-block-end-width
        8. border-block-start
        9. border-block-start-color
        10. border-block-start-style
        11. border-block-start-width
        12. border-block-style
        13. border-block-width
        14. border-bottom
        15. border-bottom-color
        16. border-bottom-left-radius
        17. border-bottom-right-radius
        18. border-bottom-style
        19. border-bottom-width
        20. border-collapse
        21. border-color
        22. border-end-end-radius
        23. border-end-start-radius
        24. border-image
        25. border-image-outset
        26. border-image-repeat
        27. border-image-slice
        28. border-image-source
        29. border-image-width
        30. border-inline
        31. border-inline-color
        32. border-inline-end
        33. border-inline-end-color
        34. border-inline-end-style
        35. border-inline-end-width
        36. border-inline-start
        37. border-inline-start-color
        38. border-inline-start-style
        39. border-inline-start-width
        40. border-inline-style
        41. border-inline-width
        42. border-left
        43. border-left-color
        44. border-left-style
        45. border-left-width
        46. border-radius
        47. border-right
        48. border-right-color
        49. border-right-style
        50. border-right-width
        51. border-spacing
        52. border-start-end-radius
        53. border-start-start-radius
        54. border-style
        55. border-top
        56. border-top-color
        57. border-top-left-radius
        58. border-top-right-radius
        59. border-top-style
        60. border-top-width
        61. border-width
    15. bottom
    16. box-*
        1. box-align Non-standard Deprecated
        2. box-decoration-break
        3. box-direction Non-standard Deprecated
        4. box-flex Non-standard Deprecated
        5. box-flex-group Non-standard Deprecated
        6. box-lines Non-standard Deprecated
        7. box-ordinal-group Non-standard Deprecated
        8. box-orient Non-standard Deprecated
        9. box-pack Non-standard Deprecated
        10. box-shadow
        11. box-sizing
    17. break-*
        1. break-after
        2. break-before
        3. break-inside
    18. caption-side
    19. caret-color
    20. clear
    21. clip Deprecated
    22. clip-path
    23. color-*
        1. color
        2. color-interpolation
        3. color-scheme
    24. column-*
        1. column-count
        2. column-fill
        3. column-gap
        4. column-rule
        5. column-rule-color
        6. column-rule-style
        7. column-rule-width
        8. column-span
        9. column-width
    25. columns
    26. contain-*
        1. contain
        2. contain-intrinsic-block-size
        3. contain-intrinsic-height
        4. contain-intrinsic-inline-size
        5. contain-intrinsic-size
        6. contain-intrinsic-width
    27. container-*
        1. container
        2. container-name
        3. container-type
    28. content
    29. content-visibility Experimental
    30. counter-*
        1. counter-increment
        2. counter-reset
        3. counter-set
    31. cursor
    32. direction
    33. display
    34. empty-cells
    35. field-sizing
    36. filter
    37. flex-*
        1. flex
        2. flex-basis
        3. flex-direction
        4. flex-flow
        5. flex-grow
        6. flex-shrink
        7. flex-wrap
    38. float
    39. font-*
        1. font
        2. font-family
        3. font-feature-settings
        4. font-kerning
        5. font-language-override
        6. font-optical-sizing
        7. font-palette
        8. font-size
        9. font-size-adjust
        10. font-smooth Non-standard
        11. font-stretch
        12. font-style
        13. font-synthesis
        14. font-synthesis-position
        15. font-synthesis-small-caps
        16. font-synthesis-style
        17. font-synthesis-weight
        18. font-variant
        19. font-variant-alternates
        20. font-variant-caps
        21. font-variant-east-asian
        22. font-variant-emoji
        23. font-variant-ligatures
        24. font-variant-numeric
        25. font-variant-position
        26. font-variation-settings
        27. font-weight
    40. forced-color-adjust
    41. gap
    42. grid-*
        1. grid
        2. grid-area
        3. grid-auto-columns
        4. grid-auto-flow
        5. grid-auto-rows
        6. grid-column
        7. grid-column-end
        8. grid-column-start
        9. grid-row
        10. grid-row-end
        11. grid-row-start
        12. grid-template
        13. grid-template-areas
        14. grid-template-columns
        15. grid-template-rows
    43. hanging-punctuation
    44. height
    45. hyphenate-character
    46. hyphenate-limit-chars
    47. hyphens
    48. image-*
        1. image-orientation
        2. image-rendering
        3. image-resolution Experimental
    49. initial-letter Experimental
    50. initial-letter-align Experimental
    51. inline-size
    52. inset-*
        1. inset
        2. inset-block
        3. inset-block-end
        4. inset-block-start
        5. inset-inline
        6. inset-inline-end
        7. inset-inline-start
    53. isolation
    54. justify-*
        1. justify-content
        2. justify-items
        3. justify-self
    55. left
    56. letter-spacing
    57. line-*
        1. line-break
        2. line-height
        3. line-height-step Experimental
    58. list-*
        1. list-style
        2. list-style-image
        3. list-style-position
        4. list-style-type
    59. margin-*
        1. margin
        2. margin-block
        3. margin-block-end
        4. margin-block-start
        5. margin-bottom
        6. margin-inline
        7. margin-inline-end
        8. margin-inline-start
        9. margin-left
        10. margin-right
        11. margin-top
        12. margin-trim Experimental
    60. mask-*
        1. mask
        2. mask-border
        3. mask-border-mode
        4. mask-border-outset
        5. mask-border-repeat
        6. mask-border-slice
        7. mask-border-source
        8. mask-border-width
        9. mask-clip
        10. mask-composite
        11. mask-image
        12. mask-mode
        13. mask-origin
        14. mask-position
        15. mask-repeat
        16. mask-size
        17. mask-type
    61. masonry-auto-flow Experimental
    62. math-*
        1. math-depth
        2. math-shift Experimental
        3. math-style
    63. max-*
        1. max-block-size
        2. max-height
        3. max-inline-size
        4. max-width
    64. min-*
        1. min-block-size
        2. min-height
        3. min-inline-size
        4. min-width
    65. mix-blend-mode
    66. object-fit
    67. object-position
    68. offset-*
        1. offset
        2. offset-anchor
        3. offset-distance
        4. offset-path
        5. offset-position
        6. offset-rotate
    69. opacity
    70. order
    71. orphans
    72. outline-*
        1. outline
        2. outline-color
        3. outline-offset
        4. outline-style
        5. outline-width
    73. overflow-*
        1. overflow
        2. overflow-anchor
        3. overflow-block
        4. overflow-clip-margin
        5. overflow-inline
        6. overflow-wrap
        7. overflow-x
        8. overflow-y
    74. overlay Experimental
    75. overscroll-*
        1. overscroll-behavior
        2. overscroll-behavior-block
        3. overscroll-behavior-inline
        4. overscroll-behavior-x
        5. overscroll-behavior-y
    76. padding-*
        1. padding
        2. padding-block
        3. padding-block-end
        4. padding-block-start
        5. padding-bottom
        6. padding-inline
        7. padding-inline-end
        8. padding-inline-start
        9. padding-left
        10. padding-right
        11. padding-top
    77. page-*
        1. page
        2. page-break-after
        3. page-break-before
        4. page-break-inside
    78. paint-order
    79. perspective
    80. perspective-origin
    81. place-*
        1. place-content
        2. place-items
        3. place-self
    82. pointer-events
    83. position-*
        1. position
        2. position-anchor Experimental
        3. position-visibility Experimental
    84. print-color-adjust
    85. quotes
    86. resize
    87. right
    88. rotate
    89. row-gap
    90. ruby-align Experimental
    91. ruby-position
    92. scale
    93. scroll-*
        1. scroll-behavior
        2. scroll-margin
        3. scroll-margin-block
        4. scroll-margin-block-end
        5. scroll-margin-block-start
        6. scroll-margin-bottom
        7. scroll-margin-inline
        8. scroll-margin-inline-end
        9. scroll-margin-inline-start
        10. scroll-margin-left
        11. scroll-margin-right
        12. scroll-margin-top
        13. scroll-padding
        14. scroll-padding-block
        15. scroll-padding-block-end
        16. scroll-padding-block-start
        17. scroll-padding-bottom
        18. scroll-padding-inline
        19. scroll-padding-inline-end
        20. scroll-padding-inline-start
        21. scroll-padding-left
        22. scroll-padding-right
        23. scroll-padding-top
        24. scroll-snap-align
        25. scroll-snap-stop
        26. scroll-snap-type
        27. scroll-timeline Experimental
        28. scroll-timeline-axis Experimental
        29. scroll-timeline-name Experimental
    94. scrollbar-*
        1. scrollbar-color
        2. scrollbar-gutter
        3. scrollbar-width
    95. shape-*
        1. shape-image-threshold
        2. shape-margin
        3. shape-outside
    96. tab-size
    97. table-layout
    98. text-*
        1. text-align
        2. text-align-last
        3. text-combine-upright
        4. text-decoration
        5. text-decoration-color
        6. text-decoration-line
        7. text-decoration-skip Experimental
        8. text-decoration-skip-ink
        9. text-decoration-style
        10. text-decoration-thickness
        11. text-emphasis
        12. text-emphasis-color
        13. text-emphasis-position
        14. text-emphasis-style
        15. text-indent
        16. text-justify
        17. text-orientation
        18. text-overflow
        19. text-rendering
        20. text-shadow
        21. text-size-adjust Experimental
        22. text-transform
        23. text-underline-offset
        24. text-underline-position
        25. text-wrap
        26. text-wrap-mode
        27. text-wrap-style
    99. timeline-scope Experimental
    100. top
    101. touch-action
    102. transform-*
         1. transform
         2. transform-box
         3. transform-origin
         4. transform-style
    103. transition-*
         1. transition
         2. transition-behavior
         3. transition-delay
         4. transition-duration
         5. transition-property
         6. transition-timing-function
    104. translate
    105. unicode-bidi
    106. user-modify Non-standard Deprecated
    107. user-select
    108. vertical-align
    109. view-*
         1. view-timeline Experimental
         2. view-timeline-axis Experimental
         3. view-timeline-inset Experimental
         4. view-timeline-name Experimental
         5. view-transition-name Experimental
    110. visibility
    111. white-space
    112. white-space-collapse
    113. widows
    114. width
    115. will-change
    116. word-break
    117. word-spacing
    118. writing-mode
    119. z-index
    120. zoom
11. Selectors
    1. Attribute selectors
    2. Class selectors
    3. ID selectors
    4. & nesting selector
    5. Type selectors
    6. Universal selectors
12. Combinators
    1. Child combinator
    2. Column combinator Experimental
    3. Descendant combinator
    4. Namespace separator
    5. Next-sibling combinator
    6. Selector list
    7. Subsequent-sibling combinator
13. Pseudo-classes
    1. :-moz-broken Non-standard
    2. :-moz-drag-over Non-standard
    3. :-moz-first-node Non-standard
    4. :-moz-handler-blocked Non-standard
    5. :-moz-handler-crashed Non-standard
    6. :-moz-handler-disabled Non-standard
    7. :-moz-last-node Non-standard
    8. :-moz-loading Non-standard
    9. :-moz-locale-dir(ltr) Non-standard
    10. :-moz-locale-dir(rtl) Non-standard
    11. :-moz-only-whitespace Non-standard
    12. :-moz-submit-invalid Non-standard
    13. :-moz-suppressed Non-standard
    14. :-moz-user-disabled Non-standard
    15. :-moz-window-inactive Non-standard
    16. :active
    17. :any-link
    18. :autofill
    19. :blank Experimental
    20. :buffering
    21. :checked
    22. :current
    23. :default
    24. :defined
    25. :dir()
    26. :disabled
    27. :empty
    28. :enabled
    29. :first
    30. :first-child
    31. :first-of-type
    32. :focus
    33. :focus-visible
    34. :focus-within
    35. :fullscreen
    36. :future
    37. :has()
    38. :host
    39. :host-context()
    40. :host()
    41. :hover
    42. :in-range
    43. :indeterminate
    44. :invalid
    45. :is()
    46. :lang()
    47. :last-child
    48. :last-of-type
    49. :left
    50. :link
    51. :local-link
    52. :modal
    53. :muted
    54. :not()
    55. :nth-child()
    56. :nth-last-child()
    57. :nth-last-of-type()
    58. :nth-of-type()
    59. :only-child
    60. :only-of-type
    61. :optional
    62. :out-of-range
    63. :past
    64. :paused
    65. :picture-in-picture
    66. :placeholder-shown
    67. :playing
    68. :popover-open
    69. :read-only
    70. :read-write
    71. :required
    72. :right
    73. :root
    74. :scope
    75. :seeking
    76. :stalled
    77. :state() Experimental
    78. :target
    79. :target-within Experimental
    80. :user-invalid
    81. :user-valid
    82. :valid
    83. :visited
    84. :volume-locked
    85. :where()
14. Pseudo-elements
    1. ::-moz-color-swatch Non-standard
    2. ::-moz-focus-inner Experimental
    3. ::-moz-list-bullet Non-standard
    4. ::-moz-list-number Non-standard
    5. ::-moz-page Non-standard
    6. ::-moz-page-sequence Non-standard
    7. ::-moz-progress-bar Non-standard
    8. ::-moz-range-progress Non-standard
    9. ::-moz-range-thumb Non-standard
    10. ::-moz-range-track Non-standard
    11. ::-moz-scrolled-page-sequence Non-standard
    12. ::-webkit-inner-spin-button Non-standard
    13. ::-webkit-meter-bar Non-standard
    14. ::-webkit-meter-even-less-good-value Non-standard
    15. ::-webkit-meter-inner-element Non-standard
    16. ::-webkit-meter-optimum-value Non-standard
    17. ::-webkit-meter-suboptimum-value Non-standard
    18. ::-webkit-progress-bar Non-standard
    19. ::-webkit-progress-inner-element Non-standard
    20. ::-webkit-progress-value Non-standard
    21. ::-webkit-scrollbar Non-standard
    22. ::-webkit-search-cancel-button Non-standard
    23. ::-webkit-search-results-button Non-standard
    24. ::-webkit-slider-runnable-track Experimental
    25. ::-webkit-slider-thumb Experimental
    26. ::after
    27. ::backdrop
    28. ::before
    29. ::cue
    30. ::cue-region
    31. ::file-selector-button
    32. ::first-letter
    33. ::first-line
    34. ::grammar-error
    35. ::highlight()
    36. ::marker
    37. ::part()
    38. ::placeholder
    39. ::selection
    40. ::slotted()
    41. ::spelling-error
    42. ::target-text Experimental
    43. ::view-transition Experimental
    44. ::view-transition-group Experimental
    45. ::view-transition-image-pair Experimental
    46. ::view-transition-new Experimental
    47. ::view-transition-old Experimental
15. At-rules
    1. @charset
    2. @color-profile
    3. @container
    4. @counter-style
    5. @document Non-standard Deprecated
    6. @font-face
    7. @font-feature-values
    8. @font-palette-values
    9. @import
    10. @keyframes
    11. @layer
    12. @media
    13. @namespace
    14. @page
    15. @property
    16. @scope
    17. @starting-style Experimental
    18. @supports
    19. @view-transition
16. Functions
    1. -moz-image-rect Non-standard Deprecated
    2. abs()
    3. acos()
    4. anchor()
    5. asin()
    6. atan()
    7. atan2()
    8. attr()
    9. blur()
    10. brightness()
    11. calc()
    12. circle()
    13. clamp()
    14. color-contrast() Experimental
    15. color-mix()
    16. color()
    17. conic-gradient()
    18. contrast()
    19. cos()
    20. counter()
    21. counters()
    22. cross-fade()
    23. device-cmyk()
    24. drop-shadow()
    25. element() Experimental
    26. ellipse()
    27. env()
    28. exp()
    29. fit-content()
    30. grayscale()
    31. hsl()
    32. hue-rotate()
    33. hwb()
    34. hypot()
    35. image-set()
    36. image()
    37. inset()
    38. invert()
    39. lab()
    40. lch()
    41. light-dark()
    42. linear-gradient()
    43. log()
    44. matrix()
    45. matrix3d()
    46. max()
    47. min()
    48. minmax()
    49. mod()
    50. oklab()
    51. oklch()
    52. opacity()
    53. paint()
    54. palette-mix() Experimental
    55. path()
    56. perspective()
    57. polygon()
    58. pow()
    59. radial-gradient()
    60. ray()
    61. rect()
    62. rem()
    63. repeat()
    64. repeating-conic-gradient()
    65. repeating-linear-gradient()
    66. repeating-radial-gradient()
    67. rgb()
    68. rotate()
    69. rotate3d()
    70. rotateX()
    71. rotateY()
    72. rotateZ()
    73. round()
    74. saturate()
    75. scale()
    76. scale3d()
    77. scaleX()
    78. scaleY()
    79. scaleZ()
    80. scroll() Experimental
    81. sepia()
    82. shape()
    83. sign()
    84. sin()
    85. skew()
    86. skewX()
    87. skewY()
    88. sqrt()
    89. symbols()
    90. tan()
    91. translate()
    92. translate3d()
    93. translateX()
    94. translateY()
    95. translateZ()
    96. url()
    97. var()
    98. view() Experimental
    99. xywh()
17. Types
    1. <absolute-size>
    2. <alpha-value>
    3. <angle>
    4. <angle-percentage>
    5. <basic-shape>
    6. <blend-mode>
    7. <box-edge>
    8. <calc-keyword>
    9. <calc-sum>
    10. <color-interpolation-method>
    11. <color>
    12. <custom-ident>
    13. <dashed-ident>
    14. <dimension>
    15. <display-box>
    16. <display-inside>
    17. <display-internal>
    18. <display-legacy>
    19. <display-listitem>
    20. <display-outside>
    21. <easing-function>
    22. <filter-function>
    23. <flex>
    24. <frequency>
    25. <frequency-percentage>
    26. <generic-family>
    27. <gradient>
    28. <hex-color>
    29. <hue>
    30. <hue-interpolation-method>
    31. <ident>
    32. <image>
    33. <integer>
    34. <length>
    35. <length-percentage>
    36. <line-style>
    37. <named-color>
    38. <number>
    39. <overflow>
    40. <percentage>
    41. <position>
    42. <ratio>
    43. <relative-size>
    44. <resolution>
    45. <shape> Deprecated
    46. <string>
    47. <system-color>
    48. <time>
    49. <time-percentage>
    50. <transform-function>
18. Guides
19. Animations
    1. Using CSS animations
20. Backgrounds and Borders
    1. Using multiple backgrounds
    2. Resizing background images
21. Box alignment
    1. Box alignment in block layout
    2. Box alignment in flexbox
    3. Box alignment in grid layout
    4. Box alignment in multi-column layout
22. Box model
    1. Introduction to the CSS basic box model
    2. Mastering margin collapsing
23. Colors
    1. Applying color to HTML elements
    2. Color values
    3. Using relative colors
    4. Using color wisely
    5. Accessibility: Understanding colors and luminance
    6. Accessibility: Color contrast
24. Columns
    1. Basic concepts of Multicol
    2. Styling columns
    3. Spanning and balancing
    4. Handling overflow in Multicol
    5. Content breaks in Multicol
25. Conditional rules
    1. Using feature queries
26. Containment
    1. Using CSS containment
    2. CSS container queries
    3. Using container size and style queries
27. CSSOM view
    1. Coordinate systems
28. Flexbox
    1. Basic concepts of Flexbox
    2. Comparison with other layout methods
    3. Aligning items in a flex container
    4. Ordering flex items
    5. Controlling flex item ratios
    6. Mastering wrapping of flex items
    7. Typical use cases of Flexbox
29. Flow layout
    1. Block and Inline layout in normal flow
    2. In flow and Out of flow
    3. Formatting contexts explained
    4. Flow layout and writing modes
    5. Flow layout and overflow
30. Fonts
    1. OpenType font features guide
    2. Variable fonts guide
31. Grid
    1. Basics concepts of grid layout
    2. Relationship to other layout methods
    3. Line-based placement
    4. Grid template areas
    5. Layout using named grid lines
    6. Auto-placement in grid layout
    7. Box alignment in grid layout
    8. Grids, logical values and writing modes
    9. Grid layout and accessibility
    10. Grid Layout and progressive enhancement
    11. Realizing common layouts using grids
    12. Subgrid
    13. Masonry layout
32. Images
    1. Using CSS gradients
33. Lists and counters
    1. Using CSS counters
    2. Consistent list indentation
34. Logical properties
    1. Basic concepts
    2. Floating and positioning
    3. Margins, borders and padding
    4. Sizing
35. Math functions
    1. Using CSS math functions
36. Media queries
    1. Using media queries
    2. Using media queries for accessibility
    3. Testing media queries programmatically
    4. Printing
37. Nesting style rules
    1. Using CSS nesting
    2. Nesting at-rules
    3. Nesting and specificity
38. Positioning
    1. Understanding CSS z-index
39. Scroll snap
    1. Basic concepts of scroll snap
40. Shapes
    1. Overview of shapes
    2. Shapes from box values
    3. Basic shapes
    4. Shapes from images
41. Text
    1. Wrapping and breaking text
42. Transforms
    1. Using transforms
43. Transitions
    1. Using transitions
44. Layout cookbook
45. 1. Media objects
    2. Columns
    3. Center an element
    4. Sticky footers
    5. Split navigation
    6. Breadcrumb navigation
    7. List group with badges
    8. Pagination
    9. Card
    10. Grid wrapper
46. Tools
47. 1. Color picker
    2. Box shadow generator
    3. Border image generator
    4. Border radius generator

• Try it
• Syntax
• Formal definition
• Formal syntax
• Examples
• Specifications
• Browser compatibility
• See also

The column-width CSS property sets the ideal column width in a multi-column layout. The container will have as many columns as can fit without any of them having a width less than the column-width value. If the width of the container is narrower than the specified value, the single column's width will be smaller than the declared column width.

Try it

This property can help you create responsive designs that fit different screen sizes. Especially in the presence of the column-count property (which has precedence), you must specify all related length values to achieve an exact column width. In horizontal text these are width, column-width, column-gap, and column-rule-width.

Syntax

css/* Keyword value */ column-width: auto; /* <length> values */ column-width: 60px; column-width: 15.5em; column-width: 3.3vw; /* Global values */ column-width: inherit; column-width: initial; column-width: revert; column-width: revert-layer; column-width: unset;

The column-width property is specified as one of the values listed below.

Values

<length>

Indicates the optimal column width. The actual column width may differ from the specified value: it may be wider when necessary to fill available space, and narrower when the available space is too small. The value must be strictly positive or the declaration is invalid. Percentage values are also invalid.

auto

The width of the column is determined by other CSS properties, such as column-count.

Formal definition

Initial value	auto
Applies to	Block containers except table wrapper boxes
Inherited	no
Computed value	the absolute length, zero or larger
Animation type	a length

Formal syntax

column-width = auto | <length [0,∞]> | min-content | max-content | fit-content( <length-percentage> ) <length-percentage> = <length> | <percentage>

Examples

Setting column width in pixels

HTML

html<p class="content-box"> Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exercitation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. </p>

CSS

css.content-box { column-width: 100px; }

Result

Specifications

Specification
CSS Box Sizing Module Level 3 # column-sizing
CSS Multi-column Layout Module Level 1 # cw

Browser compatibility

BCD tables only load in the browser

See also

• Multiple-column Layout (Learn Layout)
• Basic Concepts of Multicol

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