The typedef for axios.get rightly doesn't include a mockReturnValueOnce property. Click Save Changes. Also, there are ways to bypass the enabled option, for example by calling the refetch method returned from useQuery.In that case, the id might really be undefined.. I've found the best way to go here, if you don't like the non-null assertion operator, is to accept that id can be . interface IAction { type: string } interface IActionA extends IAction { a: string } interface IActionB extends IAction { b: string } const reducer = (action: IAction) { switch (action.type) { case 'a': return console.info('action a: ', action.a) // property 'a' does not exists on type IAction case 'b': return console.info('action b: ', action.b . I have updated code that worked fine with Angular 5.5/rxJS5.5 using the new pipe method to Angular 6/rxJS6 using the rxjs-lint package and the following commands. 在用 TypeScript 写angular2或者i on ic2项目时，导入原来JavaScript代码，有时出现" property does not exist on value of type "问题 即该对象找不到此属性，原因是 ts 是静态语言，类型是需要定义的，未定义就有可能找不到。 最简单的解决方式是：加 as any eg：y. Property'$axios'doesnotexistontype'xxx'； bao 03-012530 问题 在 mian.ts vue 原型绑定属性 Vue.prototype.$axios= axios, 在组件中使用的时候编辑器报错, 但是可以正常运行代码. Property does not exist on type 'AxiosResponse '._wflynn的博客-程序员秘密 So now when we use mockGetLadder & mockGetPlayers in our tests, they finally type-check. Property does not exist on type 'AxiosResponse - CSDN Property does not exist on type 'AxiosResponse '._wflynn的博客-程序员秘密 技术标签： typeScript import * as axios from 'axios' declare module 'axios' { interface AxiosInstance { // eslint-disable-next-line no-undef (config: AxiosRequestConfig): Promise<any> } } Typescript で Property does not exist on type などと言われたとき 如果你是用的 vuecli 创建的项目，那么请在 res 文件夹下新建 axios.d.ts 文件，添加以下内容：. . Property 'Authorization' does not exist on type 'HeadersDefaults' }>>' 。. 获取响应数据 | TypeScript 从零实现 axios
