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  To create a consistent user experience across applications, design systems provide strict rules for designing and coding interactive elements, just as they provide a visual design language.
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                      [MUSIC]
                      0:00
                    
                    
                      Visual design language guidelines,
are the Legos of a design system.
                      0:05
                    
                    
                      These design elements
are like building blocks
                      0:10
                    
                    
                      you piece together to construct
almost any sort of application.
                      0:13
                    
                    
                      With rigid parameters to restrict their
size, shape, material and connectivity.
                      0:17
                    
                    
                      It's unlikely, however, for
a design system to stop there.
                      0:25
                    
                    
                      Once you understand the rules of applying
color, typography, space, image, and
                      0:29
                    
                    
                      motion within the design system, you'll
combine them into interactive elements.
                      0:35
                    
                    
                      The same way you might snap Legos
together to form doors and windows,
                      0:41
                    
                    
                      stairs and bridges.
                      0:46
                    
                    
                      To create a consistent user
experience across applications,
                      0:49
                    
                    
                      design systems provide strict rules for
designing and coding interactive elements
                      0:53
                    
                    
                      just as they provide
a visual design language.
                      0:59
                    
                    
                      These rules for
interactive elements might be called
                      1:04
                    
                    
                      a User Interface Library, or a Component
Library, or even a Pattern Library.
                      1:08
                    
                    
                      But whatever it's called, the goal is the
same: to guide the style, implementation,
                      1:15
                    
                    
                      and functionality of interactive elements,
and create a predictable and
                      1:22
                    
                    
                      accessible interactive experience
across all applications.
                      1:27
                    
                    
                      In the next video,
we'll explore a few examples and
                      1:33
                    
                    
                      see how design systems define and
categorize interactive components.
                      1:36
                    
              
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