实例化接口类型的变量

的属性类型 fields IHtmlField 实例,但构造 伊赫特姆菲尔德 :

const fields: {[type: string]: {new(): IHtmlField}} = {
  text: TextInput,
  file: FileInput
}

interface IHtmlField {
    name: string
}

class TextInput implements IHtmlField {
    public name: string
}

class FileInput implements IHtmlField {
    public name: string
}

const fields: { [type: string]: IHtmlField } = {
    text: new TextInput(),
    file: new FileInput()
}

const type = 'text' // dynamic variable
const fieldCls = fields[type]

console.log(fieldCls.name);
//   new fieldCls()