Private elements are counterparts of the regular class elements which are public, including class fields, class methods, etc. Private elements get created by using a hash # prefix and cannot be legally referenced outside of the class. The privacy encapsulation of these class elements is enforced by JavaScript itself. The only way to access a private element is via dot notation, and you can only do so within the class that defines the private element.

The white-space SVG attribute specifies how white space within text should be handled. This includes whether and how white space inside the element is collapsed and whether lines may wrap at unforced soft wrap opportunities.

A thread-safe reference-counting pointer. ‘Arc’ stands for ‘Atomically Reference Counted’.

The JavaScript exceptions thrown by JSON.parse() occur when string failed to be parsed as JSON.

The repeatCount attribute indicates the number of times an animation will take place.

The JavaScript exception "invalid property name in regular expression" or "invalid class property name in regular expression" occurs when the \p and \P Unicode character class escapes are not followed by a valid Unicode property name and/or value.

The Uint8Array typed array represents an array of 8-bit unsigned integers. The contents are initialized to 0 unless initialization data is explicitly provided. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).

The JavaScript warning "unreachable code after return statement" occurs when using an expression after a return statement, or when using a semicolon-less return statement but including an expression directly after.

A range only bounded inclusively below (`start..`).

The JavaScript exception "is not a constructor" occurs when there was an attempt to use an object or a variable as a constructor, but that object or variable is not a constructor.