The <line> element is an SVG basic shape used to create a line connecting two points.

Every property in JavaScript objects can be classified by three factors:

Low-level languages like C, have manual memory management primitives such as malloc() and free(). In contrast, JavaScript automatically allocates memory when objects are created and frees it when they are not used anymore (garbage collection). This automaticity is a potential source of confusion: it can give developers the false impression that they don't need to worry about memory management.

The <mask> element defines an alpha mask for compositing the current object into the background. A mask is used/referenced using the mask property.

The less than or equal (<=) operator returns true if the left operand is less than or equal to the right operand, and false otherwise.

The function* keyword can be used to define a generator function inside an expression.

The SVG <image> element allows for raster images to be rendered within an SVG object.

The <a> SVG element creates a hyperlink to other web pages, files, locations in the same page, email addresses, or any other URL. It is very similar to HTML's <a> element.

The <linearGradient> element lets authors define linear gradients to apply to other SVG elements.

The radius attribute represents the radius (or radii) for the operation on a given <feMorphology> filter primitive.