Bootstrap button drop-down menu and bootstrap drop-down menu

Bootstrap button drop-down menu and bootstrap drop-down menu
Put any button in. btn-group, and then add the appropriate menu label to make the button as a menu trigger. You only need to change some basic labels in the single-button drop-down menu to switch the button into a drop-down menu. The Code is as follows:

<! DOCTYPE html> 



The split button drop-down menu is similar. The split button drop-down menu also needs to change some labels, but there is only one separate button. The Code is as follows:
<! DOCTYPE html> 





The dimension-based drop-down menu applies to buttons of all sizes. The Code is as follows:
<! DOCTYPE html> 

Add the. dropup class to the parent element in the pop-up menu to open the trigger drop-down menu above it. The Code is as follows:
<! DOCTYPE html> 

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