Enhance your bootstrap accordion by incorporating stylish up and down arrows using the <accordion> element

I am currently developing a sophisticated web application using Angular and TypeScript, and I have decided to incorporate accordions in some sections. The setup for these accordions involves TypeScript/Bootstrap as shown below:

<accordion>

<accordion-group heading="">

</accordion-group>

</accordion>

My question is, how can I add an up/down arrow to the accordion?

I attempted to utilize :after pseudo-classes and the content attribute with CSS on the rendered accordion classes, but it did not produce the desired outcome. I experimented with various classes without success. Is there a simpler method for achieving this?

This is the HTML snippet in question:

...

<accordion>

 <accordion-group heading="{{'Model.EntityName' | translate}}" [isOpen]="true">

...

</accordion>

...

Here is the corresponding Sass code:

...

.panel-heading .accordion-toggle:after {
  /* Symbol for "opening" panels */
  font-family: 'Glyphicons Halflings'; /* Necessary for glyphicon usage */
  content: "\e114";
  float: right;
  color: grey;
}

...
htmlcssangulartypescripttwitter-bootstrap-3

Answer №1

Check out the following code snippet for toggling the 'active' class:

.panel-heading .accordion-toggle:before {
        font-family: 'Glyphicons Halflings';
        content: "\e114";
        float: right;
        transition: all 0.5s;
     }
     .panel-heading .accordion-toggle.active:before {
         -webkit-transform: rotate(180deg);
         -moz-transform: rotate(180deg);
         transform: rotate(180deg);
     }

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