1. /**
    
  2.  * Copyright (c) Meta Platforms, Inc. and affiliates.
    
  3.  *
    
  4.  * This source code is licensed under the MIT license found in the
    
  5.  * LICENSE file in the root directory of this source tree.
    
  6.  *
    
  7.  * @flow
    
  8.  */
    
  9. 
    
  10. const uppercasePattern = /([A-Z])/g;
    
  11. const msPattern = /^ms-/;
    
  12. 
    
  13. /**
    
  14.  * Hyphenates a camelcased CSS property name, for example:
    
  15.  *
    
  16.  *   > hyphenateStyleName('backgroundColor')
    
  17.  *   < "background-color"
    
  18.  *   > hyphenateStyleName('MozTransition')
    
  19.  *   < "-moz-transition"
    
  20.  *   > hyphenateStyleName('msTransition')
    
  21.  *   < "-ms-transition"
    
  22.  *
    
  23.  * As Modernizr suggests (http://modernizr.com/docs/#prefixed), an `ms` prefix
    
  24.  * is converted to `-ms-`.
    
  25.  */
    
  26. export default function hyphenateStyleName(name: string): string {
    
  27.   return name
    
  28.     .replace(uppercasePattern, '-$1')
    
  29.     .toLowerCase()
    
  30.     .replace(msPattern, '-ms-');
    
  31. }