Angular4 Application running issues in IE11

The default polyfills.ts file is commented and need to uncomment lines of code and run npm install the corresponding module. Then it will compatible with the IE11

I got this when I tried to add an es7 import. I simply replaced the es6 import with the es7 import. Turns out I needed both.

Gives me "Exception thrown and not caught" error:

import 'core-js/es7/array';

Works fine:

import 'core-js/es6/array';
import 'core-js/es7/array';

To add more detail to @Zeqing's answer.

I uncommented the following line of codes in .\my-app\src\polyfills.ts :

/** 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/set';