问示例webpack angular4应用程序抛出错误

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[at-loader] Checking finished with 26 errors                                                                        chunk    {0} vendor.js
(vendor) 2.64 MB {2} [initial] [rendered]
chunk    {1} app.js, app.css (app) 3.57 kB {0} [initial] [rendered]
chunk    {2} polyfills.js (polyfills) 577 kB [entry] [rendered]

WARNING in ./~/@angular/core/@angular/core.es5.js
5870:15-36 Critical dependency: the request of a dependency is an expression

WARNING in ./~/@angular/core/@angular/core.es5.js
5886:15-102 Critical dependency: the request of a dependency is an expression

ERROR in [at-loader] ./node_modules/@angular/common/src/platform_id.d.ts:8:42
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./node_modules/@angular/common/src/platform_id.d.ts:9:41
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./node_modules/@angular/common/src/platform_id.d.ts:10:45
    TS1039: Initializers are not allowed in ambient contexts.
ERROR in [at-loader] ./node_modules/@angular/common/src/platform_id.d.ts:11:44
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./node_modules/@angular/compiler/src/util.d.ts:8:36
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./node_modules/@angular/core/src/animation/animation_metadata_wrapped.d.ts:12:33
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./node_modules/@angular/core/src/animation/dsl.d.ts:34:33
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./node_modules/@angular/core/src/errors.d.ts:9:33
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./node_modules/@angular/core/src/errors.d.ts:10:43
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./node_modules/@angular/core/src/errors.d.ts:11:42
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./node_modules/@angular/core/src/errors.d.ts:12:43
    TS1039: Initializers are not allowed in ambient contexts.
ERROR in [at-loader] ./node_modules/@angular/core/src/errors.d.ts:13:35
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./node_modules/@angular/core/testing/src/before_each.d.ts:1:59
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./node_modules/@angular/http/src/backends/browser_jsonp.d.ts:1:33
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./node_modules/@angular/platform-browser/src/dom/dom_renderer.d.ts:14:41
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./node_modules/@angular/router/src/shared.d.ts:15:37
    TS1039: Initializers are not allowed in ambient contexts.

ERROR in [at-loader] ./src/app/app.component.spec.ts:3:1
    TS2304: Cannot find name 'describe'.

ERROR in [at-loader] ./src/app/app.component.spec.ts:4:3
    TS2304: Cannot find name 'beforeEach'.

ERROR in [at-loader] ./src/app/app.component.spec.ts:7:3
    TS2304: Cannot find name 'it'.

ERROR in [at-loader] ./src/app/app.component.spec.ts:9:5
    TS2304: Cannot find name 'expect'.

ERROR in [at-loader] ./src/app/app.component.ts:5:13
    TS2304: Cannot find name 'require'.

ERROR in [at-loader] ./src/app/app.component.ts:6:12
    TS2304: Cannot find name 'require'.

ERROR in [at-loader] ./src/main.ts:4:5
    TS2304: Cannot find name 'process'.

ERROR in [at-loader] ./src/polyfills.ts:3:1
    TS2304: Cannot find name 'require'.

ERROR in [at-loader] ./src/polyfills.ts:5:5
    TS2304: Cannot find name 'process'.

ERROR in [at-loader] ./src/polyfills.ts:10:3
    TS2304: Cannot find name 'require'.
Child html-webpack-plugin for "index.html":
    chunk    {0} index.html 325 bytes [entry] [rendered]
Child extract-text-webpack-plugin:
    chunk    {0} extract-text-webpack-plugin-output-filename 1.92 kB [entry] [rendered]
webpack: Failed to compile.