TypeError：无法在IE 10上获取未定义或空引用的属性“ngMetadataName”

Question

在IE 10中，我收到以下错误:(但在IE 11中确定）

TypeError：无法获取未定义或空引用的属性“ngMetadataName”

ngMetadataName在vendor.js被发现。

polyfills.ts如下：

  /******************************************************************************* 

BROWSER POLYFILLS
*/
/** IE9, IE10 and IE11 requires all of the following polyfills. **/
import 'core-js/es6/symbol';
import 'core-js/es6/object';
import 'core-js/es6/function';
import 'core-js/es6/parse-int';
import 'core-js/es6/parse-float';
import 'core-js/es6/number';
import 'core-js/es6/math';
import 'core-js/es6/string';
import 'core-js/es6/date';
import 'core-js/es6/array';
import 'core-js/es6/regexp';
import 'core-js/es6/map';
import 'core-js/es6/weak-map';
import 'core-js/es6/set';

/** IE10 and IE11 requires the following for NgClass support on SVG elements */
import 'classlist.js'; // Run npm install --save classlist.js.

/** IE10 and IE11 requires the following for the Reflect API. */
import 'core-js/es6/reflect';

/** Evergreen browsers require these. **/
// Used for reflect-metadata in JIT. If you use AOT (and only Angular decorators), you can remove.
import 'core-js/es7/reflect';

/**

Web Animations @angular/platform-browser/animations
Only required if AnimationBuilder is used within the application and using IE/Edge or Safari.
Standard animation support in Angular DOES NOT require any polyfills (as of Angular 6.0).
**/
import 'web-animations-js'; // Run npm install --save web-animations-js.
/**

By default, zone.js will patch all possible macroTask and DomEvents
user can disable parts of macroTask/DomEvents patch by setting following flags
*/
// (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
// (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
// (window as any).__zone_symbol__BLACK_LISTED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames

/*

in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
with the following flag, it will bypass zone.js patch for IE/Edge
*/
(window as any).__Zone_enable_cross_context_check = true;
/***************************************************************************************************

Zone JS is required by default for Angular itself.
*/
import 'zone.js/dist/zone'; // Included with Angular CLI.
/***************************************************************************************************

APPLICATION IMPORTS
*/

你能否建议如何为IE 10解决这个问题。

谢谢

Answer 1

我已经将angular-cli从6.0.8更新到6.2.3（最新），它解决了上述错误。

这个链接github#24339可能会有所帮助。

感谢@ Suresh Kumar Riya

Answer 2

这是需要在entryComponents中声明的组件的问题。角度~7.2.2上部版本打破了这些组件。

1. 首先，我建议删除所有^和〜以维护稳定的应用程序版本。
2. 角7包的稳定版本是7.2.2。因此，将所有@ angular / package_name的版本7.2.2放在package.json上

   "@angular/cli "7.2.2",
   "@angular/compiler "7.2.2",
   "@angular/compiler-cli "7.2.2",
   "@angular/language-service "7.2.2",

Answer 3

将@ angular / cli（及相关软件包）升级到7.2.9或更高版本应该可以解决此问题。

npm install @angular/cli@latest @angular/compiler@latest @angular/compiler-cli@latest @angular/language-service@latest