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Angular 5: Cannot read property 'startsWith' of null
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Stack Overflow用户
提问于 2018-05-31 04:12:50
回答 1查看 0关注 0票数 0

当我使用命令运行我的Angular 5应用程序时,ng serve --prod构建阶段成功,我没有任何编译错误。

一旦我启动应用程序,我收到这个错误:

ERROR Error: Uncaught (in promise): TypeError: Cannot read property 'startsWith' of null
    TypeError: Cannot read property 'startsWith' of null
        at t.peekStartsWith (router.js.pre-build-optimizer.js:1553)
        at t.consumeOptional (router.js.pre-build-optimizer.js:1563)
        at t.parseRootSegment (router.js.pre-build-optimizer.js:1357)
        at t.parse (router.js.pre-build-optimizer.js:1204)
        at t.applyRedirectCommands (router.js.pre-build-optimizer.js:2062)
        at t.expandRegularSegmentAgainstRouteUsingRedirect (router.js.pre-build-optimizer.js:1937)
        at t.expandSegmentAgainstRouteUsingRedirect (router.js.pre-build-optimizer.js:1887)
        at t.expandSegmentAgainstRoute (router.js.pre-build-optimizer.js:1861)
        at e.project (router.js.pre-build-optimizer.js:1798)
        at e._next (map.js.pre-build-optimizer.js:79)
        at t.peekStartsWith (router.js.pre-build-optimizer.js:1553)
        at t.consumeOptional (router.js.pre-build-optimizer.js:1563)
        at t.parseRootSegment (router.js.pre-build-optimizer.js:1357)
        at t.parse (router.js.pre-build-optimizer.js:1204)
        at t.applyRedirectCommands (router.js.pre-build-optimizer.js:2062)
        at t.expandRegularSegmentAgainstRouteUsingRedirect (router.js.pre-build-optimizer.js:1937)
        at t.expandSegmentAgainstRouteUsingRedirect (router.js.pre-build-optimizer.js:1887)
        at t.expandSegmentAgainstRoute (router.js.pre-build-optimizer.js:1861)
        at e.project (router.js.pre-build-optimizer.js:1798)
        at e._next (map.js.pre-build-optimizer.js:79)
        at D (zone.js:824)
        at D (zone.js:795)
        at zone.js:873
        at e.invokeTask (zone.js:425)
        at Object.onInvokeTask (core.js.pre-build-optimizer.js:4724)
        at e.invokeTask (zone.js:424)
        at t.runTask (zone.js:192)
        at d (zone.js:602)

有人知道什么会导致这种情况?

EN

回答 1

Stack Overflow用户

发布于 2018-05-31 13:26:20

使用此命令: npm install -g protractor

票数 0
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页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接:

https://stackoverflow.com/questions/-100004650

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