The Proxy and Reflect objects allow you to intercept and define custom behavior for fundamental language operations (e.g. property lookup, assignment, enumeration, function invocation, etc.). With the help of these two objects you are able to program at the meta level of JavaScript.

This chapter describes JavaScript's expressions and operators, including assignment, comparison, arithmetic, bitwise, logical, string, ternary and more.

Apart from graphic primitives like rectangles and circles, SVG offers a set of elements to embed other types of content in images as well.

The JavaScript exception "function statement requires a name" occurs when there is a function statement in the code that requires a name.

The JavaScript exception "mismatched placement" occurs when a private getter and setter are mismatched in whether or not they are static.

The result attribute defines the assigned name for this filter primitive. If supplied, then graphics that result from processing this filter primitive can be referenced by an in attribute on a subsequent filter primitive within the same <filter> element. If no value is provided, the output will only be available for re-use as the implicit input into the next filter primitive if that filter primitive provides no value for its in attribute.

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

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

The [@@match]() method of RegExp instances specifies how String.prototype.match() should behave. In addition, its presence (or absence) can influence whether an object is regarded as a regular expression.

The [@@replace]() method of RegExp instances specifies how String.prototype.replace() and String.prototype.replaceAll() should behave when the regular expression is passed in as the pattern.