The JavaScript exception "can't access lexical declaration 'X' before initialization" occurs when a lexical variable was accessed before it was initialized. This happens within any scope (global, module, function, or block) when let or const variables are accessed before the place where they are declared is executed.

the preserveAlpha attribute indicates how a <feConvolveMatrix> element handles alpha transparency.

The operator attribute has two meanings based on the context it's used in. Either it defines the compositing or morphing operation to be performed.

The preserveAspectRatio attribute indicates how an element with a viewBox providing a given aspect ratio must fit into a viewport with a different aspect ratio.

The order attribute indicates the size of the matrix to be used by a <feConvolveMatrix> element.

The paint-order attribute specifies the order that the fill, stroke, and markers of a given shape or text element are painted.

The JavaScript exception "redeclaration of formal parameter" occurs when the same variable name occurs as a function parameter and is then redeclared using a let assignment in a function body again.

The glyph-name attribute specifies the name of a glyph.

The lengthAdjust attribute controls how the text is stretched into the length defined by the textLength attribute.

The numOctaves attribute defines the number of octaves for the noise function of the <feTurbulence> primitive.