调试ionic3 app用于使用--prod标志构建它 [英] Debug ionic3 app for building it with --prod flag

问题描述

有一段时间，我没有使用 - prod 标志构建我的ionic3应用程序，它曾经工作正常，但我做了很多改动那。现在，当我运行离子cordova构建android --prod 时，我收到以下错误消息：

For a while, I didn't build my ionic3 app with --prod flag, it used to work fine, but I've made quite a few changes since that. Now when I run ionic cordova build android --prod I get this error message:

TypeError: Cannot read property 'length' of undefined
    at Object.unescapeIdentifier (/path/to/my/app/node_modules/@angular/compiler-cli/node_modules/typescript/lib/typescript.js:10550:26)
    at getTextOfNode (/path/to/my/app/node_modules/@angular/compiler-cli/node_modules/typescript/lib/typescript.js:68575:27)
    at emitIdentifier (/path/to/my/app/node_modules/@angular/compiler-cli/node_modules/typescript/lib/typescript.js:66931:19)
    at pipelineEmitUnspecified (/path/to/my/app/node_modules/@angular/compiler-cli/node_modules/typescript/lib/typescript.js:66594:28)
    at pipelineEmitWithHint (/path/to/my/app/node_modules/@angular/compiler-cli/node_modules/typescript/lib/typescript.js:66566:50)
    at pipelineEmitWithSourceMap (/path/to/my/app/node_modules/@angular/compiler-cli/node_modules/typescript/lib/typescript.js:66558:17)
    at emitNodeWithComments (/path/to/my/app/node_modules/@angular/compiler-cli/node_modules/typescript/lib/typescript.js:64200:17)
    at pipelineEmitWithComments (/path/to/my/app/node_modules/@angular/compiler-cli/node_modules/typescript/lib/typescript.js:66547:17)
    at pipelineEmitWithNotification (/path/to/my/app/node_modules/@angular/compiler-cli/node_modules/typescript/lib/typescript.js:66541:17)
    at emit (/path/to/my/app/node_modules/@angular/compiler-cli/node_modules/typescript/lib/typescript.js:66528:13)

该应用程序构建并运行正常，无需 - prod flag。

The app builds and run fine without --prod flag.

我理解问题来自一个无法读取的未定义属性，因此打字稿拒绝编译代码。

I understand the problem comes from an undefined property that could not be read and therefore typescript refuse to compile the code.

我的问题是我不知道那个长度属性在我的应用程序中的位置，因为有很多他们
有没有办法获得有关该属性在我的代码中的位置的更多信息，从typescript或ionic，以便我可以纠正此错误并能够使用构建应用程序 - prod flag？

My problem is that I've no idea where that length property is in my app, since there are plenty of them. Is there a way to get more info about where that property is situated in my code, from typescript or ionic, so that I can correct this error and be able to build the app with --prod flag?

推荐答案

你的一个 node_modules似乎有问题项目或项目。所以删除 node_modules 文件夹，然后运行 npm i

It seems a problem with one of your node_modules item or items. So delete node_modules folder and then run npm i

这篇关于调试ionic3 app用于使用--prod标志构建它的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！