元素隐式具有“任何”类型，因为“任何”类型的表达式不能用于索引类型

Question

我遇到了许多其他有类似错误的问题，但看不出我的代码有什么问题。 您能确定如何修复ts(7053)错误。

我收到的完整错误是

Element implicitly has an 'any' type because expression of type 'string' can't be used to index type '{ card: number; dialog: number; navigation: number; layer: number; blanket: number; modal: number; flag: number; spotlight: number; tooltip: number; }'.

代码是

const zIndexToName: Record<number, string> = Object.keys(layerIndex).reduce(
  (acc: Record<number, string>, name: string) => {
    const value: number = layerIndex[name]();
    acc[value] = name;
    return acc;
  },
  {}
);

而layerIndex是

export const layerIndex = {
  card: 100,
  dialog: 300,
  navigation: 200,
  layer: 400,
  blanket: 500,
  modal: 510,
  flag: 600,
  spotlight: 700,
  tooltip: 800
};

我可以将所有string切换为any但得到相同的错误， Element implicitly has an 'any' type because expression of type 'any' can't be used to index type

const zIndexToName: Record<number, any> = Object.keys(layerIndex).reduce(
  (acc: Record<number, any>, name: any) => {
    const value: number = layerIndex[name]();
    acc[value] = name;
    return acc;
  },
  {}
);

Answer 1

您缺少layerIndex的索引类型。

export const layerIndex: { [key: string]: number }

我想 function 呼叫号码是一个错误。 它应该是

 const value: number = layerIndex[name];