gulp/util.js
function validateProp(prop) {
    return prop && prop.type === 'decl' && ![prop.prop, prop.value].some(function(value) {
      return value.indexOf('-') > -1 && prefixRegex.test(value);
    });
  }
function validateProp(prop) {
    return prop && prop.type === 'decl' && ![prop.prop, prop.value].some(function(value) {
      return value.indexOf('-') > -1 && prefixRegex.test(value);
    });
  }
function validateProp ( prop ) { return prop && prop . type === 'decl' && ! [ prop . prop , prop . value ] . some ( function ( value ) { return value . indexOf ( '-' ) > - 1 && prefixRegex . test ( value ) ; } ) ; }
Checks if a property is a style declaration and that it doesn't contain any vendor prefixes.
Checks if a property is a style declaration and that it doesn t contain any vendor prefixes .