Just simply change the configuration of Type Script:
=es5
//
{
"compileOnSave": false,
"compilerOptions": {
"baseUrl": "./",
"outDir": "./dist/out-tsc",
"sourceMap": true,
"declaration": false,
"downlevelIteration": true,
"experimentalDecorators": true,
"module": "esnext",
"moduleResolution": "node",
"importHelpers": true,
"target": "es5",
...
}
The value generated using cli is es2015 by default, so IE11 cannot recognize the operation.