ts—index properties

index 属性用来声明一个Object拥有的属性对应的类型。因为obj.property 类似 obj['property']

interface ErrorContainer {
  [prop: string ]:string; // prop is not boolean type
}

const error : ErrorContainer = {
  email:'this is  a error',
  1:'it is good' // number can convert to string
}
console.log(error["1"])

编译后的js

const error = {
    email: 'this is  a error',
    1: 'it is good' // number can convert to string
};
console.log(error["1"]);