The JavaScript exception "function statement requires a name" occurs when there is a function statement in the code that requires a name.

The text-decoration attribute defines whether text is decorated with an underline, overline and/or strike-through. It is a shorthand for the text-decoration-line and text-decoration-style properties.

The JavaScript exception "redeclaration of formal parameter" occurs when the same variable name occurs as a function parameter and is then redeclared using a let assignment in a function body again.

The AggregateError() constructor creates AggregateError objects.

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

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

The [@@replace]() method of RegExp instances specifies how String.prototype.replace() and String.prototype.replaceAll() should behave when the regular expression is passed in as the pattern.

The Map.groupBy() static method groups the elements of a given iterable using the values returned by a provided callback function. The final returned Map uses the unique values from the test function as keys, which can be used to get the array of elements in each group.

The indexOf() method of TypedArray instances returns the first index at which a given element can be found in the typed array, or -1 if it is not present. This method has the same algorithm as Array.prototype.indexOf().

The Reflect.apply() static method calls a target function with arguments as specified.