Angular 4.0.0 App built by angular-cli 1.0.0 not working in IE11

Question

I try to run my virgin Angular 4 Application built by the angular-cli 1.0.0 in the Internet Explorer 11, but I have no success and I get the following error:

Answer 1

Angular-CLI includes a file in the src/ directory called pollyfills.ts.

 * 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/es7/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/set';
import 'core-js/es7/array';

Uncomment all of the IE polyfills in that file and things should work swimmingly.

Answer 2

There is a need for a ES6 polyfill for IE 11. So you have to add a script tag for that required polyfill in order for your app to run on IE11.

See the docs for guidance on browser support.