What do the ellipsis do in Flow type declarations?

Question

What are the ellipsis called in the following Flow code and what do they do?

export type ListTypeNode = {
  +kind: 'ListType',
  +loc?: Location,
  +type: TypeNode,
  ...
};

Answer 1

这是Flow中的新语法，将来将指示该对象类型不精确（默认情况下，常规注释将是精确的对象注释）。

In a few releases, Flow will begin to treat {foo: number} as an exact object. To indicate inexactness, you must add an ellipsis to the end of an object type: {foo: number, ...}. This new syntax forces the developers to opt into inexactness.

See more details here: https://medium.com/flow-type/on-the-roadmap-exact-objects-by-default-16b72933c5cf