Basic example
Place one add-on or button on either side of an input. You may also place one on both sides of an input. Remember to place <label>s outside the input group.
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                                                        https://example.com/users/
                                                        
                                                    
                                                
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                                                Wrapping inputs
 Input groups wrap by default via 
                                                flex-wrap: wrap in order to accommodate custom form field validation within an input group. You may disable this with .flex-nowrap
                                                Various sizing
 Add the relative form sizing classes to the 
                                                .input-group itself and contents within will automatically resize—no need for repeating the form control size classes on each element. Sizing on the individual input group elements isn't supported
                                                
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                                                Checkboxes and radios
 Place any checkbox or radio option within an input group's addon instead of text 
                                                
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                                                        Multiple inputs
 Add the relative form sizing classes to the 
                                                .input-group itself and contents within will automatically resize—no need for repeating the form control size classes on each element. You can add .input-group-multi-transition to .input-group to animate focused inputs 
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                                                Segmented buttons
 Dropdown with action buttons 
                                                Seamless icon
 Add seamless icons using various utility classes 
                                                Button addon
Buttons with dropdown
 Dropdowns are easily integrated just like buttons, you can have more than one dropdowns 
                                                Custom forms
 Input groups include support for custom selects and custom file inputs. Browser default versions of these are not supported 
                                                File upload
 Combine file upload with addon elements 
                                                
                                                        Upload
                                                        
                                                    
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                                                        Upload
                                                    
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                                                Kitchen sink
 A combination of elements working in harmony 
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