The dashes property of the path, text and points types is described as an object with index access and an additional offset property. However, two.js assumes an array with an additional offset property. Therefore, the provided data results in a runtime error.

The expected data, according to the TypeScript type definition, is as follows:

l.dashes = { 0: 5, 1: 5, offset: 0 };

Correct data:

l.dashes = [5, 5];
l.dashes.offset = 0;