The JavaScript strict mode-only exception "setting getter-only property" occurs when there is an attempt to set a new value to a property for which only a getter is specified, or when setting a private property that similarly only has a getter defined.

As an XML dialect, SVG is namespaced. It is important to understand the concept of namespaces and how they are used if you plan to author SVG content. Namespaces are essential to user agents that support multiple XML dialects; browsers must be very strict. Taking the time to understand namespaces now will save you from future headaches.

The JavaScript exception "invalid Array.prototype.sort argument" occurs when the argument of Array.prototype.sort() (and its related methods: Array.prototype.toSorted(), TypedArray.prototype.sort(), TypedArray.prototype.toSorted()) isn't either undefined or a function which compares its operands.

SVG elements can be modified using attributes that specify details about exactly how the element should be handled or rendered.

The JavaScript exception "setter functions must have one argument" occurs when a setter is declared and the parameter list is not consisted of exactly one formal parameter.

The JavaScript exception "SyntaxError: private fields can't be deleted" occurs when delete is used on a private property of a class or an object.

The JavaScript exception "must call super constructor before using 'this' in derived class constructor" occurs when the super() is not called for a given derived class constructor, and the derived constructor tries to access the value of this, or the derived constructor has already returned and the return value is not an object.

The JavaScript exception "x is (not) y" occurs when there was an unexpected type. Oftentimes, unexpected undefined or null values.

The y2 attribute is used to specify the second y-coordinate for drawing an SVG element that requires more than one coordinate. Elements that only need one coordinate use the y attribute instead.

SVG images can be used as an image format, in a number of contexts. Browsers support SVG images in: