The path attribute has two different meanings, either it defines a text path along which the characters of a text are rendered, or a motion path along which a referenced element is animated.

The await using declaration declares block-scoped local variables that are asynchronously disposed. Like const, variables declared with await using must be initialized and cannot be reassigned. The variable's value must be either null, undefined, or an object with an [Symbol.asyncDispose]() or [Symbol.dispose]() method. When the variable goes out of scope, the [Symbol.asyncDispose]() or [Symbol.dispose]() method of the object is called and awaited, to ensure that resources are freed.

The patternUnits attribute indicates which coordinate system to use for the geometry properties of the <pattern> element.

The JavaScript exception "missing = in const declaration" occurs when a const declaration was not given a value in the same statement (like const RED_FLAG;). You need to provide one (const RED_FLAG = true).

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 lineNumber data property of an Error instance contains the line number in the file that raised this error.

The columnNumber data property of an Error instance contains the column number in the line of the file that raised this error.

# Contributors by commit history https://github.com/mdn/content/commits/main/files/en-us/web/javascript/guide/indexed_collections/index.md # Original Wiki contributors dd-pardal jer wbamberg fschol...

The lastIndexOf() method of Array instances returns the last index at which a given element can be found in the array, or -1 if it is not present. The array is searched backwards, starting at fromIndex.

The shift() method of Array instances removes the first element from an array and returns that removed element. This method changes the length of the array.