border-bottom

CSS border-bottom Property

Set the style of the bottom border for different elements:

h1 <
border-bottom: 5px solid red;
>

h2 border-bottom: 4px dotted blue;
>

Definition and Usage

The border-bottom property is a shorthand property for (in the following order):

If border-bottom-color is omitted, the color applied will be the color of the text.

Default value:	medium none color
Inherited:	no
Animatable:	yes, see individual properties. Read about animatable Try it
Version:	CSS1
JavaScript syntax:	object.style.borderBottom=»15px dotted lightblue» Try it

Browser Support

The numbers in the table specify the first browser version that fully supports the property.

CSS Syntax

Property Values

Value	Description	Demo
border-bottom-width	Required. Specifies the width of the bottom border. Default value is «medium»	Demo ❯
border-bottom-style	Required. Specifies the style of the bottom border. Default value is «none»	Demo ❯
border-bottom-color	Optional. Specifies the color of the bottom border. Default value is the color of the text	Demo ❯
initial	Sets this property to its default value. Read about initial
inherit	Inherits this property from its parent element. Read about inherit

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border

The border shorthand CSS property sets an element’s border. It sets the values of border-width , border-style , and border-color .

Try it

Constituent properties

This property is a shorthand for the following CSS properties:

Syntax

/* style */ border: solid; /* width | style */ border: 2px dotted; /* style | color */ border: outset #f33; /* width | style | color */ border: medium dashed green; /* Global values */ border: inherit; border: initial; border: revert; border: revert-layer; border: unset; 

The border property may be specified using one, two, or three of the values listed below. The order of the values does not matter.

Note: The border will be invisible if its style is not defined. This is because the style defaults to none .

Values

Sets the thickness of the border. Defaults to medium if absent. See border-width .

Sets the style of the border. Defaults to none if absent. See border-style .

Sets the color of the border. Defaults to currentcolor if absent. See border-color .

Description

As with all shorthand properties, any omitted sub-values will be set to their initial value. Importantly, border cannot be used to specify a custom value for border-image , but instead sets it to its initial value, i.e., none .

The border shorthand is especially useful when you want all four borders to be the same. To make them different from each other, however, you can use the longhand border-width , border-style , and border-color properties, which accept different values for each side. Alternatively, you can target one border at a time with the physical (e.g., border-top ) and logical (e.g., border-block-start ) border properties.

Borders vs. outlines

Borders and outlines are very similar. However, outlines differ from borders in the following ways:

• Outlines never take up space, as they are drawn outside of an element’s content.
• According to the spec, outlines don’t have to be rectangular, although they usually are.

Formal definition

• border-width : as each of the properties of the shorthand:
  • border-top-width : medium
  • border-right-width : medium
  • border-bottom-width : medium
  • border-left-width : medium
  • border-top-style : none
  • border-right-style : none
  • border-bottom-style : none
  • border-left-style : none
  • border-top-color : currentcolor
  • border-right-color : currentcolor
  • border-bottom-color : currentcolor
  • border-left-color : currentcolor
  • border-width : as each of the properties of the shorthand:
    • border-bottom-width : the absolute length or 0 if border-bottom-style is none or hidden
    • border-left-width : the absolute length or 0 if border-left-style is none or hidden
    • border-right-width : the absolute length or 0 if border-right-style is none or hidden
    • border-top-width : the absolute length or 0 if border-top-style is none or hidden
    • border-bottom-style : as specified
    • border-left-style : as specified
    • border-right-style : as specified
    • border-top-style : as specified
    • border-bottom-color : computed color
    • border-left-color : computed color
    • border-right-color : computed color
    • border-top-color : computed color
    • border-color : as each of the properties of the shorthand:
      • border-bottom-color : a color
      • border-left-color : a color
      • border-right-color : a color
      • border-top-color : a color
      • border-bottom-width : a length
      • border-left-width : a length
      • border-right-width : a length
      • border-top-width : a length

      Formal syntax

      border =
      ||
      ||

      =
      |
      thin |
      medium |
      thick

      =
      none |
      hidden |
      dotted |
      dashed |
      solid |
      double |
      groove |
      ridge |
      inset |
      outset

      Examples

      Setting a pink outset border

      HTML

      div>I have a border, an outline, and a box shadow! Amazing, isn't it?div> 

      CSS

      div  border: 0.5rem outset pink; outline: 0.5rem solid khaki; box-shadow: 0 0 0 2rem skyblue; border-radius: 12px; font: bold 1rem sans-serif; margin: 2rem; padding: 1rem; outline-offset: 0.5rem; > 

      Result

      Specifications

      Browser compatibility

      BCD tables only load in the browser

      See also

      Found a content problem with this page?

      This page was last modified on Jul 18, 2023 by MDN contributors.

      Your blueprint for a better internet.

      MDN

      Support

      Our communities

      Developers

      Visit Mozilla Corporation’s not-for-profit parent, the Mozilla Foundation.
      Portions of this content are ©1998– 2023 by individual mozilla.org contributors. Content available under a Creative Commons license.

      Источник

      border-bottom

      Свойство позволяет одновременно установить толщину, стиль и цвет границы внизу элемента. Значения могут идти в любом порядке, разделяясь пробелом, браузер сам определит, какое из них соответствует нужному свойству.

      Синтаксис

      Значения

      Значение border-width определяет толщину границы. Для управления ее видом предоставляется несколько значений свойства border-style . Их названия и результат действия представлен на рис. 1.

      

      border-color устанавливает цвет границы, значение может быть в любом допустимом для CSS формате.

      inherit наследует значение родителя.

      HTML5 CSS2.1 IE Cr Op Sa Fx

      Результат данного примера показан на рис. 2.

      

      Рис. 2. Применение свойства border-bottom

      Объектная модель

      [window.]document.getElementById(» elementID «).style.borderBottom

      Браузеры

      Браузер Internet Explorer до шестой версии включительно при толщине границы 1px отображает dotted как dashed . При толщине 2px и выше значение dotted работает корректно. Эта ошибка исправлена в IE7, но только для всех границ толщиной 1px. Если одна из границ блока имеет толщину 2px и выше, то в IE7 значение dotted превращается в dashed .

      Internet Explorer до версии 7.0 включительно не поддерживает значение inherit .

      Стиль границы в разных браузерах может несколько различаться при использовании значений groove , ridge , inset или outset .

      Источник

      border-bottom

      The border-bottom shorthand CSS property sets an element’s bottom border. It sets the values of border-bottom-width , border-bottom-style and border-bottom-color .

      Try it

      As with all shorthand properties, border-bottom always sets the values of all of the properties that it can set, even if they are not specified. It sets those that are not specified to their default values. Consider the following code:

      border-bottom-style: dotted; border-bottom: thick green; 

      It is actually the same as this one:

      border-bottom-style: dotted; border-bottom: none thick green; 

      The value of border-bottom-style given before border-bottom is ignored. Since the default value of border-bottom-style is none , not specifying the border-style part results in no border.

      Constituent properties

      This property is a shorthand for the following CSS properties:

      Syntax

      border-bottom: 1px; border-bottom: 2px dotted; border-bottom: medium dashed blue; /* Global values */ border-bottom: inherit; border-bottom: initial; border-bottom: revert; border-bottom: revert-layer; border-bottom: unset; 

      The three values of the shorthand property can be specified in any order, and one or two of them may be omitted.

      Values

      Formal definition

      • border-bottom-width : medium
      • border-bottom-style : none
      • border-bottom-color : currentcolor
      • border-bottom-width : the absolute length or 0 if border-bottom-style is none or hidden
      • border-bottom-style : as specified
      • border-bottom-color : computed color
      • border-bottom-color : a color
      • border-bottom-style : discrete
      • border-bottom-width : a length

      Formal syntax

      border-bottom =
      ||
      ||

      =
      |
      thin |
      medium |
      thick

      =
      none |
      hidden |
      dotted |
      dashed |
      solid |
      double |
      groove |
      ridge |
      inset |
      outset

      Examples

      Applying a bottom border

      HTML

      div>This box has a border on the bottom side.div> 

      CSS

      div  border-bottom: 4px dashed blue; background-color: gold; height: 100px; width: 100px; font-weight: bold; text-align: center; > 

      Results

      Specifications

      Browser compatibility

      BCD tables only load in the browser

      See also

      Found a content problem with this page?

      This page was last modified on Feb 21, 2023 by MDN contributors.

      Your blueprint for a better internet.

      MDN

      Support

      Our communities

      Developers

      Visit Mozilla Corporation’s not-for-profit parent, the Mozilla Foundation.
      Portions of this content are ©1998– 2023 by individual mozilla.org contributors. Content available under a Creative Commons license.

      Источник

      Читайте также:  Css font face font weight