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Bootstrap 4 - Collapse
Description
Collapse component is used to show or hide the content by using .collapse class. The content can be collapsed by adding data-toggle="collapse" attribute anchor or button element. The id of these elements references to the id of the content to collapse the data.
Collapse using Link
You can collapse the content with <a> tag by using href value of the ID of the content to collapse.
The following example demonstrates this −
Example
<html lang = "en"> <head> <!-- Meta tags --> <meta charset = "utf-8"> <meta name = "viewport" content = "width = device-width, initial-scale = 1, shrink-to-fit = no"> <!-- Bootstrap CSS --> <link rel = "stylesheet" href = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity = "sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin = "anonymous"> <title>Bootstrap 4 Example</title> </head> <body> <div class = "container"> <h2>Collapse with Link</h2> <p> <a class = "btn btn-info" data-toggle = "collapse" href = "#collapsewithlink" role = "button" aria-expanded = "false" aria-controls = "collapsewithlink">Click Me</a> </p> <div class = "collapse" id = "collapsewithlink"> <div class = "card card-body"> Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation. </div> </div> </div> <!-- jQuery first, then Popper.js, then Bootstrap JS --> <script src = "https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity = "sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin = "anonymous"> </script> <script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity = "sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin = "anonymous"> </script> <script src = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin = "anonymous"> </script> </body> </html>
It will produce the following result −
Output
Collapse using Button
You can collapse the content with <button> tag by using data-target attribute with value of the ID of the content to collapse.
The following example demonstrates this −
Example
<html lang = "en"> <head> <!-- Meta tags --> <meta charset = "utf-8"> <meta name = "viewport" content = "width = device-width, initial-scale = 1, shrink-to-fit = no"> <!-- Bootstrap CSS --> <link rel = "stylesheet" href = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity = "sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin = "anonymous"> <title>Bootstrap 4 Example</title> </head> <body> <div class = "container"> <h2>Collapse with Button</h2> <p> <button class = "btn btn-indo" type = "button" data-toggle = "collapse" data-target = "#collapsewithbutton" aria-expanded = "false" aria-controls = "collapsewithbutton">Click Me</button> </p> <div class = "collapse" id = "collapsewithbutton"> <div class = "card card-body"> Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation. </div> </div> </div> <!-- jQuery first, then Popper.js, then Bootstrap JS --> <script src = "https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity = "sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin = "anonymous"> </script> <script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity = "sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin = "anonymous"> </script> <script src = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin = "anonymous"> </script> </body> </html>
It will produce the following result −
Output
Accordion
You can use collapsible content to make an accordion which is often used for content such as FAQs, overviews, etc.
The below example specifies a simple accordion by extending the card component −
Example
<html lang = "en"> <head> <!-- Meta tags --> <meta charset = "utf-8"> <meta name = "viewport" content = "width = device-width, initial-scale = 1, shrink-to-fit = no"> <!-- Bootstrap CSS --> <link rel = "stylesheet" href = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity = "sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin = "anonymous"> <title>Bootstrap 4 Example</title> </head> <body> <div class = "container"> <h2>Accordion </h2> <div id = "accordion"> <div class = "card"> <div class = "card-header"> <a class = "card-link" data-toggle = "collapse" href = "#collapseOne"> Accordion #1 </a> </div> <div id = "collapseOne" class = "collapse show" data-parent = "#accordion"> <div class = "card-body">Content for Accordion #1.</div> </div> </div> <div class = "card"> <div class = "card-header"> <a class = "collapsed card-link" data-toggle = "collapse" href = "#collapseTwo"> Accordion #2 </a> </div> <div id = "collapseTwo" class = "collapse" data-parent = "#accordion"> <div class = "card-body">Content for Accordion #2.</div> </div> </div> <div class = "card"> <div class = "card-header"> <a class = "collapsed card-link" data-toggle = "collapse" href = "#collapseThree"> Accordion #3 </a> </div> <div id = "collapseThree" class = "collapse" data-parent = "#accordion"> <div class = "card-body"> Content for Accordion #3.</div> </div> </div> </div> </div> <!-- jQuery first, then Popper.js, then Bootstrap JS --> <script src = "https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity = "sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin = "anonymous"> </script> <script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity = "sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin = "anonymous"> </script> <script src = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin = "anonymous"> </script> </body> </html>
It will produce the following result −
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