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Technical articles with clear explanations and examples

Bootstrap 4 .border-dark class

Amit Diwan
Amit Diwan
Updated on 11-Mar-2026 587 Views

To set a dark border to an element in Bootstrap, use the border-dark class.To work with it is an easy task. Just use the class name as the element class −   Dark Border Above, the "test" class can also be seen. This is useful to set style for the element − .test {   width: 150px;   height: 150px;   margin: 35px; } You can try to run the following code to implement the border-dark class in Bootstrap 4 −Example       Bootstrap Example                             .test {       width: 150px;       height: 150px;       margin: 35px;     }         Rectangle with dark border:   Dark Border

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Bootstrap panel class

karthikeya Boyini
karthikeya Boyini
Updated on 11-Mar-2026 376 Views

Panel components are used when you want to put your DOM component in a box. To get a basic panel, just add class .panel to the element.You can try to run the following code to implement panel class in BootstrapExample           Bootstrap Example                                                       Demo panel                    

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Bootstrap .tooltip("destroy") method

Amit Diwan
Amit Diwan
Updated on 11-Mar-2026 2K+ Views

Use the tooltip(“destroy”) method in Bootstrap to detroy the tooltip −$(".btn-default").click(function(){   $("[data-toggle='tooltip']").tooltip('destroy'); });The following example has two buttons, one for “Show Tooltip” and another for “Destroy Tooltip” −Show Tooltip$(".btn-primary").click(function(){   $("[data-toggle='tooltip']").tooltip('show'); });Destroy Tooltip$(".btn-default").click(function(){   $("[data-toggle='tooltip']").tooltip('destroy'); });Here is the complete code to implement the tooltip(“destroy”) method −Example       Bootstrap Example                             Demo     Tooltip will be visible here           Show Tooltip       Destroy Tooltip           $(document).ready(function(){    $(".btn-primary").click(function(){      $("[data-toggle='tooltip']").tooltip('show');    });    $(".btn-default").click(function(){      $("[data-toggle='tooltip']").tooltip('destroy');    });   });

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Set Bootstrap Panel with Heading

Nancy Den
Nancy Den
Updated on 11-Mar-2026 376 Views

Follow the below steps to set Bootstrap panel with heading −Use .panel-heading class to add a heading container to your panel.Use any - with a .panel-title class to add a pre-styled heading.You can try to run the following code for panel with headings in Bootstrap −Example           Bootstrap Example                                                       Tutorials                                 Learn for free                                                                      Quiz                                                             Attempt these quizzes                    

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Align a flex item from the start with Bootstrap 4

Amit Diwan
Amit Diwan
Updated on 11-Mar-2026 234 Views

Use the .align-self-start class in Bootstrap 4 to align a flex item from the start.To align flex item from the start, you need to set the class in that particular flex item −   Item 3 The above is set inside the flex class as shown below −   Item 1   Item 2   Item 3   Item 4 You can try to run the following code to implement the align-self-start class −Example       Bootstrap Example                             Align Specific Flex Item from the start           Item 1       Item 2       Item 3       Item 4      

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Usage of Bootstrap class panel-danger

Chandu yadav
Chandu yadav
Updated on 11-Mar-2026 428 Views

The .panel-danger class in Bootstrap is used to indicate danger.You can try to run the following code to implement panel-danger class −Example           Bootstrap Example                                                       Panel title (danger)                                 This is a Basic panel                    

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Bootstrap show.bs.tooltip event

Amit Diwan
Amit Diwan
Updated on 11-Mar-2026 508 Views

The show.bs.tooltip event in Bootstrap fires when the tooltip is about to be displayed −$("[data-toggle='tooltip']").on('show.bs.tooltip', function(){   alert('Tooltip will be visible now.'); });The "data-toggle" attribute is set before as an tag attribute, since the Bootstrap generates from there itself −   Timings You can try to run the following code to implement the show.bs.tooltip event −Example       Bootstrap Example                             Event     Here tooltip will be displayed using the "Show" buttpn and ...

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Align gathered items in the center in Bootstrap 4

Amit Diwan
Amit Diwan
Updated on 11-Mar-2026 261 Views

Use the .align-content-center class to align gathered items in the center in Bootstrap 4.Set the align-content-center class as shown below −After that, add the flex items −   One   Two   Three Let us see an example to implement the align-content-center class −Example       Bootstrap Example                             Example           One       Two       Three       Four       Five       Six       Seven       Eight       Nine       Ten       Eleven       Twelve       Thirteen       Fourteen      

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How to use Bootstrap Scrollspy Plugins

Jennifer Nicholas
Jennifer Nicholas
Updated on 11-Mar-2026 245 Views

The Scroll spy (auto updating nav) plugin allows you to target sections of the page based on the scrollposition. In its basic implementation, as you scroll, you can add .active classes to the navbar based onthe scroll position.You can try to run the following code to implement scrollspy plugin in Bootstrap −Example           Bootstrap Example                                                                      Toggle ...

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Bootstrap 4 .flex-nowrap class

David Meador
David Meador
Updated on 11-Mar-2026 2K+ Views

Avoid wrapping flex items in Bootstrap 4, using the .flex-nowrap class.Below you can see the flex items aren’t wrapping after the “Eight” flex-item −The flex is set in the div class as if we add any other class in −The following is an example to implement flex-nowrap class to avoid wrapping of flex items −Example       Bootstrap Example                                   FLEX WRAP AND NOWRAP       Flex items will wrap               One         Two         Three         Four         Five         Six         Seven         Eight         Nine             Flex items won't wrap               One         Two         Three         Four         Five         Six         Seven         Eight         Nine            

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