The unsigned right shift assignment (>>>=) operator performs unsigned right shift on the two operands and assigns the result to the left operand.

The <circle> SVG element is an SVG basic shape, used to draw circles based on a center point and a radius.

The <glyph> SVG element defines a single glyph in an SVG font.

The <g> SVG element is a container used to group other SVG elements.

The with statement extends the scope chain for a statement.

The pointsAtY attribute represents the y location in the coordinate system established by attribute primitiveUnits on the <filter> element of the point at which the light source is pointing.

A non-capturing group groups a subpattern, allowing you to apply a quantifier to the entire group or use disjunctions within it. It acts like the grouping operator in JavaScript expressions, and unlike capturing groups, it does not memorize the matched text, allowing for better performance and avoiding confusion when the pattern also contains useful capturing groups.

The JavaScript exception "unparenthesized unary expression can't appear on the left-hand side of '**'" occurs when a unary operator (one of typeof, void, delete, await, !, ~, +, -) is used on the left operand of the exponentiation operator without parentheses.

The JavaScript exception "missing name after . operator" occurs when there is a problem with how the dot operator (.) is used for property access.

The slope attribute defines the values for linear filters, such as brightness.