JavaScript DOM Programming Art----Notes

   smooth degradation and progressive enhancement principle 
   
   smooth degeneration:   
  If you use JavaScript scripts correctly, you can allow visitors to navigate your site without the support of JavaScript in their browsers.  
  This is called stationary degradation (graceful degradation), which means that although some functions are not available, But the most basic operation can still be completed smoothly. 
  
   progressive enhancement:   
   
  The Web pages that were created in accordance with the "progressive enhancement" principle were almost consistent with the "smooth degradation" principle.  
 
   summary: 
      Ensure that the Web page works in the worst case scenario, and then add a new feature on that basis    
   

JavaScript DOM Programming Art----notes