The delete() method of WeakSet instances removes the specified value from this set, if it is in the set.

The has() method of WeakSet instances returns a boolean indicating whether the specified value exists in this WeakSet or not.

Groups group multiple patterns as a whole, and capturing groups provide extra submatch information when using a regular expression pattern to match against a string. Backreferences refer to a previously captured group in the same regular expression.

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 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 Float64Array() constructor creates Float64Array objects. The contents are initialized to 0 unless initialization data is explicitly provided.

The prototype property of AsyncGeneratorFunction.prototype is shared by all async generator functions. Its value is AsyncGenerator.prototype. Each async generator function created with the async function* syntax or the AsyncGeneratorFunction() constructor also has its own prototype property, whose prototype is AsyncGeneratorFunction.prototype.prototype. When the async generator function is called, its prototype property becomes the prototype of the returned async generator object.

The resizable accessor property of ArrayBuffer instances returns whether this array buffer can be resized or not.

The use() method of AsyncDisposableStack instances registers a value that implements the async disposable protocol to the stack.

jQuery API Documentation Adds the specified class(es) to each element in the set of matched elements. Get the value o...