The Object.isFrozen() static method determines if an object is frozen.

The sticky accessor property of RegExp instances returns whether or not the y flag is used with this regular expression.

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This page provides an overall cheat sheet of all the capabilities of RegExp syntax by aggregating the content of the articles in the RegExp guide. If you need more information on a specific topic, please follow the link on the corresponding heading to access the full article or head to the guide.

The RegExp.input static accessor property returns the string against which a regular expression is matched. RegExp.$_ is an alias for this property.

The flags accessor property of RegExp instances returns the flags of this regular expression.

The lastIndex data property of a RegExp instance specifies the index at which to start the next match.

The RegExp.rightContext static accessor property returns the substring following the most recent match. RegExp["$'"] is an alias for this property.

The toString() method of RegExp instances returns a string representing this regular expression.