Class methods and arrow functions must not be invoked using new, and attempting to do so will result in a runtime error.

Conversely, constructors can only be invoked using new or super(...), and attempting to invoke them as a normal function will result in a runtime error.

Correct the invocation in question by adding or removing new as appropriate.

In the following example, Point is a class, but on line 8 it is invoked without new. This will lead to a runtime error.

class Point { constructor(x, y) { this.x = x; this.y = y; } } let p = Point(23, 42);

Instead, new should be used:

class Point { constructor(x, y) { this.x = x; this.y = y; } } let p = new Point(23, 42);

Mozilla Developer Network: Constructors.

Mozilla Developer Network: Arrow functions.

Mozilla Developer Network: Method definitions.