348 function isColor(value) {  argument
349   return value != 'auto' &&
351       isKeyword('color')(value) ||
352       isHexColor(value) ||
353       isColorFunction(value) ||
354       isNamedEntity(value)
358 function isColorFunction(value) {  argument
359   return isRgbColor(value) || isHslColor(value);
362 function isDynamicUnit(value) {  argument
363   return calcRegex.test(value);
366 function isFunction(value) {  argument
367   return functionAnyRegex.test(value);
370 function isHexColor(value) {  argument
371 …ValueColorRegex.test(value) || fourValueColorRegex.test(value) || sixValueColorRegex.test(value) |…
374 function isHslColor(value) {  argument
375   return hslColorRegex.test(value);
378 function isIdentifier(value) {  argument
379   return identifierRegex.test(value);
382 function isImage(value) {  argument
383   return value == 'none' || value == 'inherit' || isUrl(value);
387   return function(value) {  argument
388     return Keywords[propertyName].indexOf(value) > -1;
392 function isNamedEntity(value) {  argument
393   return namedEntityRegex.test(value);
396 function isNumber(value) {  argument
397   return scanForNumber(value) == value.length;
400 function isRgbColor(value) {  argument
401   return rgbColorRegex.test(value);
404 function isPrefixed(value) {  argument
405   return prefixRegex.test(value);
408 function isPositiveNumber(value) {  argument
409   return isNumber(value) &&
410     parseFloat(value) >= 0;
413 function isVariable(value) {  argument
414   return variableRegex.test(value);
417 function isTime(value) {  argument
418   var numberUpTo = scanForNumber(value);
420   return numberUpTo == value.length && parseInt(value) === 0 ||
421     numberUpTo > -1 && validTimeUnits.indexOf(value.slice(numberUpTo + 1)) > -1;
427   return function (value) {  argument
428     return isTimingFunctionKeyword(value) || timingFunctionRegex.test(value);
432 function isUnit(validUnits, value) {  argument
433   var numberUpTo = scanForNumber(value);
435   return numberUpTo == value.length && parseInt(value) === 0 ||
436     numberUpTo > -1 && validUnits.indexOf(value.slice(numberUpTo + 1)) > -1 ||
437     value == 'auto' ||
438     value == 'inherit';
441 function isUrl(value) {  argument
442   return urlRegex.test(value);
445 function isZIndex(value) {  argument
446   return value == 'auto' ||
447     isNumber(value) ||
448     isKeyword('^')(value);
451 function scanForNumber(value) {  argument
457   for (i = 0, l = value.length; i < l; i++) {
458     character = value[i];
479   var validUnits = Units.slice(0).filter(function (value) {  argument
480     return !(value in compatibility.units) || compatibility.units[value] === true;