Question

在尝试使用typescript和npm运行我的Angular2应用程序时，我收到了标题中的错误。正如在类似主题中所说，我尝试了“import”reflect-metadata';“ 但它没有用。

这是我的package.json文件中的依赖项：

"reflect-metadata": "0.1.3",

提前感谢您的时间

P.S：这是在我将我的应用程序从rc4升级到rc5

之后发生的

修改1

有关错误的更多详细信息：

checkReflect    @   vendor.js:40700
(anonymous function)    @   vendor.js:40702
(anonymous function)    @   vendor.js:40791
initModule  @   vendor.js:43
require @   vendor.js:60
expanded    @   vendor.js:34
(anonymous function)    @   vendor.js:148
(anonymous function)    @   vendor.js:30176
(anonymous function)    @   vendor.js:30215
initModule  @   vendor.js:43
require @   vendor.js:60
expanded    @   vendor.js:34
(anonymous function)    @   vendor.js:148
(anonymous function)    @   vendor.js:30634
(anonymous function)    @   vendor.js:30652
initModule  @   vendor.js:43
require @   vendor.js:60
expanded    @   vendor.js:34
(anonymous function)    @   vendor.js:148
(anonymous function)    @   vendor.js:37326
(anonymous function)    @   vendor.js:37842
initModule  @   vendor.js:43
require @   vendor.js:60
expanded    @   vendor.js:34
(anonymous function)    @   vendor.js:148
(anonymous function)    @   vendor.js:36288
(anonymous function)    @   vendor.js:37305
initModule  @   vendor.js:43
require @   vendor.js:60
expanded    @   vendor.js:34
(anonymous function)    @   vendor.js:148
(anonymous function)    @   vendor.js:26058
(anonymous function)    @   vendor.js:26118
initModule  @   vendor.js:43
require @   vendor.js:60
expanded    @   vendor.js:34
(anonymous function)    @   vendor.js:148
(anonymous function)    @   vendor.js:9935
(anonymous function)    @   vendor.js:10294
initModule  @   vendor.js:43
require @   vendor.js:60
expanded    @   vendor.js:34
(anonymous function)    @   vendor.js:148
(anonymous function)    @   vendor.js:12761
(anonymous function)    @   vendor.js:12871
initModule  @   vendor.js:43
require @   vendor.js:60
expanded    @   vendor.js:34
(anonymous function)    @   vendor.js:148
(anonymous function)    @   vendor.js:12255
(anonymous function)    @   vendor.js:12657
initModule  @   vendor.js:43
require @   vendor.js:60
expanded    @   vendor.js:34
(anonymous function)    @   vendor.js:148
(anonymous function)    @   vendor.js:12907
(anonymous function)    @   vendor.js:12935
initModule  @   vendor.js:43
require @   vendor.js:60
expanded    @   vendor.js:34
(anonymous function)    @   vendor.js:148
(anonymous function)    @   vendor.js:12885
(anonymous function)    @   vendor.js:12892
initModule  @   vendor.js:43
require @   vendor.js:60
expanded    @   vendor.js:34
(anonymous function)    @   vendor.js:148
(anonymous function)    @   vendor.js:6709
(anonymous function)    @   vendor.js:6746
initModule  @   vendor.js:43
require @   vendor.js:60
expanded    @   vendor.js:34
(anonymous function)    @   vendor.js:148
(anonymous function)    @   vendor.js:49327
(anonymous function)    @   vendor.js:49528
initModule  @   vendor.js:43
require @   vendor.js:60
expanded    @   vendor.js:34
(anonymous function)    @   main.js:404
initModule  @   vendor.js:43
require @   vendor.js:60
(anonymous function)    @   (index):38

Answer 1

当我为我的swagger生成的客户端代码升级为休息终点时，我发现angular 4.1.3 cli reflect-metadata版本存在同样的问题（swagger编辑器2.2.3）。

我添加了angular 4，它对我有用。任何人在cli之后面对此问题并拥有_fails.js:1 Uncaught SyntaxError: Unexpected identifier at Object../node_modules/core-js/modules/_descriptors.js (_descriptors.js:2) at __webpack_require__ (bootstrap aaad282eb132f1a48d07:54) at Object../node_modules/core-js/modules/es6.symbol.js (es6.symbol.js:5) at __webpack_require__ (bootstrap aaad282eb132f1a48d07:54) at Object../node_modules/core-js/es6/symbol.js (polyfills.bundle.js:1560) at __webpack_require__ (bootstrap aaad282eb132f1a48d07:54) at Object../src/polyfills.ts (ckset.ts:17) at __webpack_require__ (bootstrap aaad282eb132f1a48d07:54) at Object.2 (polyfills.bundle.js:13849) at __webpack_require__ (bootstrap aaad282eb132f1a48d07:54) core.es5.js:354 Uncaught reflect-metadata shim is required when using class decorators可能会有所帮助。

错误消息与下面的

略有不同

'start_time'

Answer 2

控制台中应该有错误解释未加载reflect-metadata的原因。

0.1.3存在的问题是模块化系统（SystemJS，Webpack等）可能错误地包含conditional dependencies。如果脚本以正常方式加载，则不会发生这种情况，

<script src="https://npmcdn.com/reflect-metadata@0.1.3"></script>

以后的软件包版本应该用于reflect-metadata模块化系统，目前可以使用0.1.8。

使用类装饰器时，需要使用未捕获的反射元数据填充程序

2 个答案: