The x2 attribute is used to specify the second x-coordinate for drawing an SVG element that requires more than one coordinate. Elements that only need one coordinate use the x attribute instead.

Modern browsers support using SVG within CSS styles to apply graphical effects to HTML content.

The v-hanging attribute indicates the alignment coordinate for glyphs to achieve hanging baseline alignment. The value is an offset in the font coordinate system relative to the glyph-specific vert-origin-x attribute.

The word-spacing attribute specifies spacing behavior between words.

The Promise() constructor creates Promise objects. It is primarily used to wrap callback-based APIs that do not already support promises.

The [@@matchAll]() method of RegExp instances specifies how String.prototype.matchAll should behave.

The arguments.length data property contains the number of arguments passed to the function.

The forEach() method of Array instances executes a provided function once for each array element.

The join() method of Array instances creates and returns a new string by concatenating all of the elements in this array, separated by commas or a specified separator string. If the array has only one item, then that item will be returned without using the separator.

The Promise.resolve() static method "resolves" a given value to a Promise. If the value is a promise, that promise is returned; if the value is a thenable, Promise.resolve() will call the then() method with two callbacks it prepared; otherwise the returned promise will be fulfilled with the value.