# Contributors by commit history https://github.com/mdn/content/commits/main/files/en-us/web/svg/reference/attribute/to/index.md # Original Wiki contributors Sebastianz HTMLValidator SueSmith Jerem...

The JavaScript exception "invalid BigInt syntax" occurs when a string value is being coerced to a BigInt but it failed to be parsed as an integer.

The stitchTiles attribute defines how the Perlin Noise tiles behave at the border.

The JavaScript exception "invalid capture group name in regular expression" occurs when a named capturing group or named backreference contains an invalid identifier.

The JavaScript exception "Unexpected '#' used outside of class body" occurs when a hash ("#") is encountered in an unexpected context, most notably outside of a class declaration. Hashes are valid at the beginning of a file as a hashbang comment, or inside of a class as part of a private field. You may encounter this error if you forget the quotation marks when trying to access a DOM identifier as well.

The origin attribute specifies the origin of motion for an animation. It has no effect in SVG.

The JavaScript warning "Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead" occurs when there is a deprecated source map syntax in a JavaScript source.

The JavaScript exception "x can't be converted to BigInt" occurs when attempting to convert a Symbol, null, or undefined value to a BigInt, or if an operation expecting a BigInt parameter receives a number.

The requiredFeatures attribute takes a list of feature strings, with the individual strings separated by white space. It determines whether or not all of the named features are supported by the browser; if all of them are supported, the attribute evaluates to true end the element is rendered; otherwise, the attribute evaluates to false and the current element and its children are skipped and thus will not be rendered. This provides a way to design SVG that gracefully falls back when features aren't available.

The markerHeight attribute represents the height of the viewport into which the <marker> is to be fitted when it is rendered according to the viewBox and preserveAspectRatio attributes.