Bootstrap border bottom

Bootstrap border bottom DEFAULT

How to use border with Bootstrap

There's a property in CSS called It determines the total width of an element on your page. The default value is , which doesn't include the padding, margin, or border of the element.

Hence, if you set a to have and padding all around, it will take up on your website (500 + 20 + 20).

This is what is causing your problem. Bootstrap calculates set widths for things just like the above example, and these things don't have borders. Since Bootstrap fits together like a puzzle, adding a border to one of the sides would yield a total width of 501px (continuing the above example) and break your layout.

The easiest way to fix this is to adjust your . The value you would use is . This includes the padding and border in your box elements. You can read more about box-sizing here.

A problem with this solution is that it only works on IE8+. Consequently, if you need deeper IE support you'll need to override the Bootstrap widths to account for your border.

To give an example of how to calculate a new width, begin by checking the width that Bootstrap sets on your element. Let's say it's a and has a width of (this is purely hypothetical, the actual width of your span6 will depend on your specific configuration of Bootstrap). If you wanted to add a single border on the right hand side with a 20px padding over there, you'd write this CSS in your stylesheet

where the new width is calculated by:

Sours: https://stackoverflow.com/questions/15328679/how-to-use-border-with-bootstrap

Bootstrap 4 Utilities

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Bootstrap 4 Utilities

Bootstrap 4 has a lot of utility/helper classes to quickly style elements without using any CSS code.


Borders

Use the classes to add or remove borders from an element:

Example

Example

<span class="border"></span>
<span class="border border-0"></span>
<span class="border border-top-0"></span>
<span class="border border-right-0"></span>
<span class="border border-bottom-0"></span>
<span class="border border-left-0"></span>

Try it Yourself »

Border Color

Add a color to the border with any of the contextual border color classes:

Example

Example

<span class="border border-primary"></span>
<span class="border border-secondary"></span>
<span class="border border-success"></span>
<span class="border border-danger"></span>
<span class="border border-warning"></span>
<span class="border border-info"></span>
<span class="border border-light"></span>
<span class="border border-dark"></span>
<span class="border border-white"></span>

Try it Yourself »

Border Radius

Add rounded corners to an element with the classes:

Example

Example

<span class="rounded-sm"></span>
<span class="rounded"></span>
<span class="rounded-lg"></span>
<span class="rounded-top"></span>
<span class="rounded-right"></span>
<span class="rounded-bottom"></span>
<span class="rounded-left"></span>
<span class="rounded-circle"></span>
<span class="rounded-0"></span>

Try it Yourself »


Float and Clearfix

Float an element to the right with the class or to the left with , and clear floats with the class:

Example

Example

<div class="clearfix">
  <span class="float-left">Float left</span>
  <span class="float-right">Float right</span>
</div>

Try it Yourself »

Responsive Floats

Float an element to the left or to the right depending on screen width, with the responsive float classes ( - where * is (>=576px), (>=768px), (>=992px) or (>=1200px)):

Example

Float right on small screens or wider


Float right on medium screens or wider


Float right on large screens or wider


Float right on extra large screens or wider


Float none

Example

<div class="float-sm-right">Float right on small screens or wider</div><br>
<div class="float-md-right">Float right on medium screens or wider</div><br>
<div class="float-lg-right">Float right on large screens or wider</div><br>
<div class="float-xl-right">Float right on extra large screens or wider</div><br>
<div class="float-none">Float none</div>

Try it Yourself »

Center Align

Center an element with the class (adds margin-left and margin-right: auto):

Example

Example

<div class="mx-auto bg-warning" style="width:150px">Centered</div>

Try it Yourself »

Width

Set the width of an element with the w-* classes (, , , , ):

Example

Width 25%

Width 50%

Width 75%

Width 100%

Max Width 100%

Example

<div class="w-25 bg-warning">Width 25%</div>
<div class="w-50 bg-warning">Width 50%</div>
<div class="w-75 bg-warning">Width 75%</div>
<div class="w-100 bg-warning">Width 100%</div>
<div class="mw-100 bg-warning">Max Width 100%</div>

Try it Yourself »

Height

Set the height of an element with the h-* classes (, , , , ):

Example

Height 25%

Height 50%

Height 75%

Height 100%

Max Height 100%

Example

<div style="height:200px;background-color:#ddd">
  <div class="h-25 bg-warning">Height 25%</div>
  <div class="h-50 bg-warning">Height 50%</div>
  <div class="h-75 bg-warning">Height 75%</div>
  <div class="h-100 bg-warning">Height 100%</div>
  <div class="mh-100 bg-warning" style="height:500px">Max Height 100%</div>
</div>

Try it Yourself »

Spacing

Bootstrap 4 has a wide range of responsive margin and padding utility classes. They work for all breakpoints: (<=576px), (>=576px), (>=768px), (>=992px) or (>=1200px)):

The classes are used in the format: for and for , , , and .

Where property is one of:

  • - sets
  • - sets

Where sides is one of:

  • - sets or
  • - sets or
  • - sets or
  • - sets or
  • - sets both and or and
  • - sets both and or and
  • blank - sets a or on all 4 sides of the element

Where size is one of:

  • - sets or to
  • - sets or to (4px if font-size is 16px)
  • - sets or to (8px if font-size is 16px)
  • - sets or to (16px if font-size is 16px)
  • - sets or to (24px if font-size is 16px)
  • - sets or to (48px if font-size is 16px)
  • - sets to auto

Note: margins can also be negative, by adding an "n" in front of size:

  • - sets to (-4px if font-size is 16px)
  • - sets to (-8px if font-size is 16px)
  • - sets to (-16px if font-size is 16px)
  • - sets to (-24px if font-size is 16px)
  • - sets to (-48px if font-size is 16px)

Example

I only have a top padding (1.5rem = 24px)

I have a padding on all sides (3rem = 48px)

I have a margin on all sides (3rem = 48px) and a bottom padding (3rem = 48px)

Example

<div class="pt-4 bg-warning">I only have a top padding (1.5rem = 24px)</div>
<div class="p-5 bg-success">I have a padding on all sides (3rem = 48px)</div>
<div class="m-5 pb-5 bg-info">I have a margin on all sides (3rem = 48px) and a bottom padding (3rem = 48px)</div>

Try it Yourself »

More Spacing Examples

margin on all sidesTry it
margin topTry it
margin bottomTry it
margin leftTry it
margin rightTry it
margin left and rightTry it
margin top and bottomTry it
padding on all sidesTry it
padding topTry it
padding bottomTry it
padding leftTry it
padding rightTry it
padding top and bottomTry it
padding left and rightTry it

Shadows

Use the classes to add shadows to an element:

Example

No shadow

Small shadow

Default shadow

Large shadow

Example

<div class="shadow-none p-4 mb-4 bg-light">No shadow</div>
<div class="shadow-sm p-4 mb-4 bg-white">Small shadow</div>
<div class="shadow p-4 mb-4 bg-white">Default shadow</div>
<div class="shadow-lg p-4 mb-4 bg-white">Large shadow</div>

Try it Yourself »

Vertical Align

Use the classes to change the alignment of elements (only works on inline, inline-block, inline-table and table cell elements):

Example

baselinetopmiddlebottomtext-toptext-bottom

Example

<span class="align-baseline">baseline</span>
<span class="align-top">top</span>
<span class="align-middle">middle</span>
<span class="align-bottom">bottom</span>
<span class="align-text-top">text-top</span>
<span class="align-text-bottom">text-bottom</span>

Try it Yourself »

Responsive Embeds

Create responsive video or slideshow embeds based on the width of the parent.

Add the to any embed elements (like <iframe> or <video>) in a parent element with and an aspect ratio of your choice:

Example

Example

<!-- 21:9 aspect ratio -->
<div class="embed-responsive embed-responsive-21by9">
  <iframe class="embed-responsive-item" src="..."></iframe>
</div>

<!-- 16:9 aspect ratio -->
<div class="embed-responsive embed-responsive-16by9">
  <iframe class="embed-responsive-item" src="..."></iframe>
</div>

<!-- 4:3 aspect ratio -->
<div class="embed-responsive embed-responsive-4by3">
  <iframe class="embed-responsive-item" src="..."></iframe>
</div>

<!-- 1:1 aspect ratio -->
<div class="embed-responsive embed-responsive-1by1">
  <iframe class="embed-responsive-item" src="..."></iframe>
</div>

Try it Yourself »

Visibility

Use the or classes to control the visibility of elements. Note: These classes do not change the CSS display value. They only add or :

Example

I am visible

I am invisible

Example

<div class="visible">I am visible</div>
<div class="invisible">I am invisible</div>

Try it Yourself »

Position

Use the class to make any element fixed/stay at the top of the page:

Example

<nav class="navbar navbar-expand-sm bg-dark navbar-dark fixed-top">
  ...
</nav>

Try it Yourself »

Use the class to make any element fixed/stay at the bottom of the page:

Example

<nav class="navbar navbar-expand-sm bg-dark navbar-dark fixed-bottom">
  ...
</nav>

Try it Yourself »

Use the class to make any element fixed/stay at the top of the page when you scroll past it. Note: This class does not work in IE11 and earlier (will treat it as ).

Example

<nav class="navbar navbar-expand-sm bg-dark navbar-dark sticky-top">
  ...
</nav>

Try it Yourself »

Close icon

Use the class to style a close icon. This is often used for alerts and modals. Note that we use the symbol to create the actual icon (a better looking "x"). Also note that it floats right by default:

Example

Example

<button type="button" class="close">&times;</button>

Try it Yourself »

Screenreaders

Use the class to hide an element on all devices, except screen readers:

Example

<span class="sr-only">I will be hidden on all screens except for screen readers.</span>

Try it Yourself »

Colors

As described in the Colors chapter, here is a list of all text and background color classes:

The classes for text colors are: , , , , , , , , , (default body color/often black) and :

Example

This text is muted.

This text is important.

This text indicates success.

This text represents some information.

This text represents a warning.

This text represents danger.

Secondary text.

Dark grey text.

Body text.

Light grey text.

Try it Yourself »

Contextual text classes can also be used on links, which will add a darker hover color:

You can also add 50% opacity for black or white text with the or classes:

Example

Black text with 50% opacity on white background

White text with 50% opacity on black background

Try it Yourself »

Background Colors

The classes for background colors are: , , , , , , and .

Note that background colors do not set the text color, so in some cases you'll want to use them together with a class.

Example

This text is important.

This text indicates success.

This text represents some information.

This text represents a warning.

This text represents danger.

Secondary background color.

Dark grey background color.

Light grey background color.

Try it Yourself »

Typography/Text Classes

As described in the Typography chapter, here is a list of all typography/text classes:

ClassDescriptionExample
Display headings are used to stand out more than normal headings (larger font-size and lighter font-weight), and there are four classes to choose from: , , , Try it
Bold textTry it
Bolder bold textTry it
Normal textTry it
Light weight textTry it
Lighter weight textTry it
Italic textTry it
Makes a paragraph stand outTry it
Indicates smaller text (set to 85% of the size of the parent)Try it
Prevents long text from breaking layoutTry it
Indicates center-aligned textTry it
Removes the underline from a linkTry it
Indicates left-aligned textTry it
Indicates justified textTry it
Monospaced textTry it
Indicates no wrap textTry it
Indicates lowercased textTry it
Resets the color of a text or a link (inherits the color from its parent)Try it
Indicates right-aligned textTry it
Indicates uppercased textTry it
Indicates capitalized textTry it
Displays the text inside an element in a slightly smaller font sizeTry it
Removes the default list-style and left margin on list items (works on both and ). This class only applies to immediate children list items (to remove the default list-style from any nested lists, apply this class to any nested lists as well)Try it
Places all list items on a single line (used together with on each <li> elements)Try it
Makes a element scrollableTry it

Block Elements

To make an element into a block element, add the class. Use any of the classes to control WHEN the element should be a block element on a specific screen width:

Example

d-blockd-sm-blockd-md-blockd-lg-blockd-xl-block

Example

<span class="d-block bg-success">d-block</span>
<span class="d-sm-block bg-success">d-sm-block</span>
<span class="d-md-block bg-success">d-md-block</span>
<span class="d-lg-block bg-success">d-lg-block</span>
<span class="d-xl-block bg-success">d-xl-block</span>

Try it Yourself »

Other Display Classes

Other display classes are also available:

ClassDescriptionExample
Hides an elementTry it
Hides an element on a specific screen sizeTry it
Makes an element inlineTry it
Makes an element inline on a specific screen sizeTry it
Makes an element inline blockTry it
Makes an element inline block on a specific screen sizeTry it
Makes an element display as a tableTry it
Makes an element display as a table on a specific screen sizeTry it
Makes an element display as a table cellTry it
Makes an element display as a table cell on a specific screen sizeTry it
Makes an element display as a table rowTry it
Makes an element display as a table row on a specific screen sizeTry it
Creates a flexbox container and transforms direct children into flex itemsTry it
Creates a flexbox container on a specific screen sizeTry it
Creates an inline flexbox containerTry it
Creates an inline flexbox container on a specific screen sizeTry it

Flex

Use classes to control the layout with flexbox.

Read more about Bootstrap 4 Flex, in our next chapter.

Example

Horizontal:

Flex item 1

Flex item 2

Flex item 3

Flex item 1

Flex item 2

Flex item 3

Vertical:

Flex item 1

Flex item 2

Flex item 3

Flex item 1

Flex item 2

Flex item 3



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Sours: https://www.w3schools.com/bootstrap4/bootstrap_utilities.asp
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Borders in bootstrap with examples

Borders: Borders are generally used to display an outline around a box or table cell or any other HTML element. In Bootstrap, there are different classes available to add or remove borders. The classes that are used to add borders are referred as Additive classes and those that are used to remove borders are referred as subtractive classes.
Additive Border Classes
 

  • .border : This class adds a border all around the element.
  • .border-top : This class adds a border on the top edge of the element.
  • .border-left : This class adds a border on the left edge of the element.
  • .border-right : This class adds a border on the right of the element.
  • .border-bottom : This class adds a border on the bottom of the element.

Subtractive Border Classes
 

  • .border-0 : This class removes border from all around the element if exists.
  • .border-top-0 : This class removes the border from the top edge of the element if exists.
  • .border-left-0 : This class removes the border from the left edge of the element if exists.
  • .border-right-0 : This class removes the border from the right of the element if exists.
  • .border-bottom-0 : This class removes the border from the bottom of the element if exists.

Below program uses all of the additive and subtractive classes to add and remove borders: 
 

html

 
 
 
 
 
 

Output
 



Color of Borders
Any colour can be added to the border by using the following border-color classes that are available in bootstrap. If you want any other cutomized color, then you can set it manually using the CSS attribute.
 

html

 
 
   
 
 
 

Output
 

Radius of Borders: Border radius is used to make the corner of border curved. More the radius, more curved and round it will be. 
In bootstrap, the following classes as used in the code are used to implement radius at particular corners. 
 

html

 
 
 
 

Output
 

Supported Browser:

  • Google Chrome
  • Internet Explorer
  • Firefox
  • Opera
  • Safari
     



My Personal Notesarrow_drop_up
Sours: https://www.geeksforgeeks.org/borders-in-bootstrap-with-examples/
Responsive Contact Form with Floating Label Animation Using Html, CSS and Bootstrap - Web dev

Bootstrap Border Utilities Tutorial with Examples

1- Border Utility

Border Utility means part of Bootstrap. It provides classes to help users to set up border for elements.

LớpDescription
.borderSet up border for 4 sides of element.
.border-leftSet up border for the left side of element.
.border-rightSet up border for the right side of element.
.border-topSet up border for the top side of element.
.border-bottomSet up border for the  bottom side of element.
.border-left-0Set up border for all sides, except for left side.
.border-right-0Set up border for all sides, except for right side.
.border-top-0Set up border for all sides, except for top side.
.border-bottom-0Set up border for all sides, except for bottom side.


border-example.html

There are a few classes to set up color for  border built-in by the Bootstrap. You can use it in a suitable context:

  • .border-primary
  • .border-secondary
  • .border-success
  • .border-danger
  • .border-warning
  • .border-info
  • .border-light
  • .border-dark
  • .border-muted
  • .border-white

border-color-example.html

3- Border width 

Bootstrap doesn't define any class to set up the width of border. But, you can self-definite such classes, for example, .border-* (* = 1, 2, 3, ...).

border-width-example.html

Some additional classes help you to round element angles.

  • .rounded
  • .rounded-left
  • .rounded-right
  • .rounded-top
  • .rounded-bottom
  • .rounded-0

round-example

Sours: https://o7planning.org/12029/bootstrap-border

Border bottom bootstrap

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Bootstrap border - Border color -Rounded border - Height Width

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