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/wp-content/themes/twentytwentyone/assets/js/ -> customize-helpers.js (source)

   1  /**
   2   * Get luminance from a HEX color.
   3   *
   4   * @param {string} hex - The hex color.
   5   *
   6   * @return {number} - Returns the luminance, number between 0 and 255.
   7   */
   8  function twentytwentyoneGetHexLum( hex ) { // jshint ignore:line
   9      var rgb = twentytwentyoneGetRgbFromHex( hex );
  10      return Math.round( ( 0.2126 * rgb.r ) + ( 0.7152 * rgb.g ) + ( 0.0722 * rgb.b ) );
  11  }
  12  
  13  /**
  14   * Get RGB from HEX.
  15   *
  16   * @param {string} hex - The hex color.
  17   *
  18   * @return {Object} - Returns an object {r, g, b}
  19   */
  20  function twentytwentyoneGetRgbFromHex( hex ) {
  21      var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i,
  22          result;
  23  
  24      // Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF").
  25      hex = hex.replace( shorthandRegex, function( m, r, g, b ) {
  26          return r.toString() + r.toString() + g.toString() + g.toString() + b.toString() + b.toString();
  27      } );
  28  
  29      result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec( hex );
  30      return result ? {
  31          r: parseInt( result[1], 16 ),
  32          g: parseInt( result[2], 16 ),
  33          b: parseInt( result[3], 16 )
  34      } : null;
  35  }


Generated : Sat Jun 19 08:20:01 2021 Cross-referenced by PHPXref