code: function extractVariables(value) {
          let regex = [/var\((.*?)\)/g, /\$([a-zA-Z0-9_\-]*)/g ],
              result = [],
              matchResult;
  
          regex.forEach(expression => {
              while (matchResult = expression.exec(value)) {
                  result.push({ origin: matchResult[0], variable: matchResult[1] });
              }
          });
  
          return result;
      }
docs: Extract custom properties and sass like variables from value.
  Return each found variable as array with objects.
  
  @example 'test vars(--var1) + $width'
  result in array with objects:
  [{origin:'vars(--var1)', variable: '--var1'},{origin:'$width', variable: 'width'}]
  @param value
  @returns {Array}