此错误是解决 this question 的结果
这是我的 ionic 信息
:
Cordova CLI: 6.5.0
Ionic Framework Version: 2.0.0
Ionic CLI Version: 2.2.1
Ionic App Lib Version: 2.2.0
Ionic App Scripts Version: 1.0.0
ios-deploy version: Not installed
ios-sim version: Not installed
OS: Windows 10
Node Version: v7.4.0
Xcode version: Not installed
(我也在使用 npm v4.1.1
)
尝试构建 @ionic/app-scripts
时,出现以下错误:
E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\node_modules\source-map\lib\source-node.js:95
var code = nextLine.substr(0, mapping.generatedColumn -
^
TypeError: Cannot read property 'substr' of undefined
at Function.<anonymous> (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\node_modules\source-map\lib\source-node.js:95:30)
at Array.forEach (native)
at BasicSourceMapConsumer.SourceMapConsumer_eachMapping [as eachMapping] (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\node_modules\source-map\lib\source-map-consumer.js:155:14)
at Function.SourceNode_fromStringWithSourceMap [as fromStringWithSourceMap] (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\node_modules\source-map\lib\source-node.js:80:24)
at SourceMapSource.node (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\lib\SourceMapSource.js:42:20)
at ReplaceSource.node (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\lib\ReplaceSource.js:69:29)
at CachedSource.node (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\lib\CachedSource.js:12:23)
at E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\lib\ConcatSource.js:40:49
at Array.map (native)
at ConcatSource.node (E:\Documents\Year_3\Mobile_Application_Development\mammoth-v2\node_modules\webpack-sources\lib\ConcatSource.js:39:60)
如果需要,当我运行 npm run build
(构建 @ionic/app-scripts
) 时,这是构建日志:
[07:28:45] ionic-app-scripts 1.0.0
[07:28:45] build dev started ...
[07:28:45] clean started ...
[07:28:45] clean finished in 4 ms
[07:28:45] copy started ...
[07:28:45] transpile started ...
[07:28:49] transpile finished in 4.44 s
[07:28:49] webpack started ...
[07:28:49] copy finished in 4.57 s
**errors arise here**
编辑:
我添加了配置:
"config": {
"ionic_generate_source_map": false
},
...到 packages.json
似乎修复了错误但现在面临另一个错误:
Error: ENOENT: no such file or directory, open 'main.js.map'
当我尝试执行 ionic serve
(@ionic/app-scripts
的构建现在工作正常)
编辑#2:
ionic
是否依赖源映射来运行?由于错误的产生是因为没有构建
最佳答案
此错误来自于一个 ts 文件中有两个 2 类/组件。
解决这个问题的残酷方法。
是去node_modules\webpack-sources\node_modules\source-map\lib\source-map\source-node.js
并交换出现的所有 2 次:
var nextLine = remainingLines[0];
为此
var nextLine = remainingLines[0] || '';
这个解决方案的问题是你不能把它放到版本控制中,因为这是 Node 模块
关于node.js - 类型错误 : Cannot read property 'substr' of undefined - source-node. js,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41907409/