The Promise.try() static method takes a callback of any kind (returns or throws, synchronously or asynchronously) and wraps its result in a Promise.

The Promise.withResolvers() static method returns an object containing a new Promise object and two functions to resolve or reject it, corresponding to the two parameters passed to the executor of the Promise() constructor.

The catch() method of Promise instances schedules a function to be called when the promise is rejected. It immediately returns another Promise object, allowing you to chain calls to other promise methods. It is a shortcut for then(undefined, onRejected).

The description accessor property of Symbol values returns a string containing the description of this symbol, or undefined if the symbol has no description.

The String.raw() static method is a tag function of template literals. This is similar to the r prefix in Python, or the @ prefix in C# for string literals. It's used to get the raw string form of template literals — that is, substitutions (e.g., ${foo}) are processed, but escape sequences (e.g., \n) are not.

The ReferenceError() constructor creates ReferenceError objects.

The valueOf() method of Date instances returns the number of milliseconds for this date since the epoch, which is defined as the midnight at the beginning of January 1, 1970, UTC.

The handler.defineProperty() method is a trap for the [[DefineOwnProperty]] object internal method, which is used by operations such as Object.defineProperty().

The handler.setPrototypeOf() method is a trap for the [[SetPrototypeOf]] object internal method, which is used by operations such as Object.setPrototypeOf().

The endsWith() method of String values determines whether a string ends with the characters of this string, returning true or false as appropriate.