The BigUint64Array typed array represents an array of 64-bit unsigned integers in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0n 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 isNaN() function determines whether a value is NaN, first converting the value to a number if necessary. Because coercion inside the isNaN() function can be surprising, you may prefer to use Number.isNaN().

The equality (==) operator checks whether its two operands are equal, returning a Boolean result. Unlike the strict equality operator, it attempts to convert and compare operands that are of different types.

The crossorigin attribute, valid on the <image>, <feImage>, and <script> elements, provides support for configuration of Cross-Origin Resource Sharing (CORS) requests for the element's fetched data.

Operator precedence determines how operators are parsed concerning each other. Operators with higher precedence become the operands of operators with lower precedence.

The limitingConeAngle attribute represents the angle in degrees between the spot light axis (i.e., the axis between the light source and the point to which it is pointing at) and the spot light cone. So it defines a limiting cone which restricts the region where the light is projected. No light is projected outside the cone.

The parseInt() function parses a string argument and returns an integer of the specified radix (the base in mathematical numeral systems).

The marker-start attribute defines the arrowhead or polymarker that will be drawn at the first vertex of the given shape.

The addition (+) operator produces the sum of numeric operands or string concatenation.

The fy attribute defines the y-axis coordinate of the focal point for a radial gradient.