The async function keywords can be used to define an async function inside an expression.

The greater than (>) operator returns true if the left operand is greater than the right operand, and false otherwise.

The [Symbol.iterator]() method of arguments objects implements the iterable protocol and allows arguments objects to be consumed by most syntaxes expecting iterables, such as the spread syntax and for...of loops. It returns an array iterator object that yields the value of each index in the arguments object.

JavaScript's strict mode is a way to opt in to a restricted variant of JavaScript, thereby implicitly opting-out of "sloppy mode". Strict mode isn't just a subset: it intentionally has different semantics from normal code. Strict mode code and non-strict mode code can coexist, so scripts can opt into strict mode incrementally.

An iterator over the contents of an instance of `BufRead` split on a particular byte.

The JavaScript exception "WeakSet key (or WeakMap value) 'x' must be an object or an unregistered symbol" occurs when an value of invalid type is used as a key in a WeakSet or as a value in a WeakMap.

The targetX attribute determines the positioning in horizontal direction of the convolution matrix relative to a given target pixel in the input image. The leftmost column of the matrix is column number zero. The value must be such that: 0 <= targetX < x of order.

Public fields are writable, enumerable, and configurable properties defined on each class instance or class constructor.

The JavaScript exception "continue must be inside loop" occurs when a continue statement is not inside a loop statement.

The JavaScript exception "duplicate formal argument x" or "duplicate argument names not allowed in this context" occurs when a function creates two or more parameter bindings with the same name, and the function is not a non-strict function with only simple parameters.