The <title> SVG element provides an accessible, short-text description of any SVG container element or graphics element.

The nullish coalescing assignment (??=) operator, also known as the logical nullish assignment operator, only evaluates the right operand and assigns to the left if the left operand is nullish (null or undefined).

The fill attribute has two different meanings. For shapes and text it's a presentation attribute that defines the color (or any SVG paint servers like gradients or patterns) used to paint the element; for animation it defines the final state of the animation.

Boolean values can be one of two values: true or false, representing the truth value of a logical proposition.

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.

The try...catch statement is comprised of a try block and either a catch block, a finally block, or both. The code in the try block is executed first, and if it throws an exception, the code in the catch block will be executed. The code in the finally block will always be executed before control flow exits the entire construct.

The font-weight attribute refers to the boldness or lightness of the glyphs used to render the text, relative to other fonts in the same font family.

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

Functions are one of the fundamental building blocks in JavaScript. A function in JavaScript is similar to a procedure—a set of statements that performs a task or calculates a value, but for a procedure to qualify as a function, it should take some input and return an output where there is some obvious relationship between the input and the output. To use a function, you must define it somewhere in the scope from which you wish to call it.

The dx attribute indicates a shift along the x-axis on the position of an element or its content.