npm运行构建:prod error clean-css

Question

今天当我运行npm run build:prod时，我得到了一个奇怪的错误。

 "build:prod": "ng build --prod --aot=false --preserve-symlinks"

错误是这样的..

92% chunk asset optimizationC:\Projects\Latest_Feb26\ASSURE.OdyssEYGen2\FrontEnd\OdyssEY-UI-Host\node_modules\clean-css
\lib\reader\input-source-map-tracker.js:37
  if (originalPosition.line === null && line > 1 && selectorFallbacks > 0) {
                      ^

TypeError: Cannot read property 'line' of undefined
    at originalPositionFor (C:\Projects\Latest_Feb26\ASSURE.OdyssEYGen2\FrontEnd\OdyssEY-UI-Host\node_modules\clean-css\
lib\reader\input-source-map-tracker.js:37:23)

构建总是运行得很好，我不确定为什么我今天会收到这个奇怪的错误。

我删除了node_modules，npm i和npm run build:prod

有人能帮我吗？

另外，在visual studio代码的“输出”选项卡上也有一些东西：

Failed to load the ESLint library for the document c:\Projects\Latest_Feb26\ASSURE.OdyssEYGen2\FrontEnd\OdyssEY-UI-Host\node_modules\clean-css\lib\reader\input-source-map-tracker.js

To use ESLint in this workspace please install eslint using 'npm install eslint' or globally using 'npm install -g eslint'.
You need to reopen the workspace after installing eslint.

谢谢

Answer 1

将node_modules/clean-css/lib/reader/input-source-map-tracker.js中的代码替换为以下代码;)

var SourceMapConsumer = require('source-map').SourceMapConsumer;

function inputSourceMapTracker() {
  var maps = {};

  return {
    all: all.bind(null, maps),
    isTracking: isTracking.bind(null, maps),
    originalPositionFor: originalPositionFor.bind(null, maps),
    track: track.bind(null, maps)
  };
}

function all(maps) {
  return maps;
}

function isTracking(maps, source) {
  return source in maps;
}

function originalPositionFor(maps, metadata, range, selectorFallbacks) {
  var line = metadata[0];
  var column = metadata[1];
  var source = metadata[2];
  var position = {
    line: line,
    column: column + range
  };
  var originalPosition;

  while (!originalPosition && position.column > column) {
    position.column--;
    originalPosition = maps[source].originalPositionFor(position);
  }

  if (originalPosition && originalPosition.line === null && line > 1 && selectorFallbacks > 0) {
    return originalPositionFor(maps, [line - 1, column, source], range, selectorFallbacks - 1);
  }

  return (originalPosition && originalPosition.line) !== null ?
    toMetadata(originalPosition) :
    metadata;
}

function toMetadata(asHash) {
  if(asHash){
    return [asHash.line, asHash.column, asHash.source];
  }
}

function track(maps, source, data) {
  maps[source] = new SourceMapConsumer(data);
}

module.exports = inputSourceMapTracker;