chore: add compatibility with IE

Author: ByPort

package.json

@@ -37,6 +37,7 @@
     "@angular/platform-browser": "6.0.3",
     "@angular/platform-browser-dynamic": "6.0.3",
     "@angular/router": "6.0.3",
+    "classlist.js": "1.1.20150312",
     "core-js": "2.5.6",
     "d3": "3.5.17",
     "getmdl-select": "2.0.1",

src/polyfills.ts

@@ -19,26 +19,26 @@
  */
 
 /** 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';
+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`.
+import 'classlist.js';  // Run `npm install --save classlist.js`.
 
 /** IE10 and IE11 requires the following for the Reflect API. */
-// import 'core-js/es6/reflect';
+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.

yarn.lock

@@ -1133,6 +1133,10 @@ class-utils@^0.3.5:
     isobject "^3.0.0"
     static-extend "^0.1.1"
 
+classlist.js@^1.1.20150312:
+  version "1.1.20150312"
+  resolved "https://registry.yarnpkg.com/classlist.js/-/classlist.js-1.1.20150312.tgz#1d70842f7022f08d9ac086ce69e5b250f2c57789"
+
 clean-css@4.1.x, clean-css@^4.1.11:
   version "4.1.11"
   resolved "https://registry.yarnpkg.com/clean-css/-/clean-css-4.1.11.tgz#2ecdf145aba38f54740f26cefd0ff3e03e125d6a"