Разбор полифилов не удался

Question

Я получаю эту ошибку в angular для чтения и анализа файла:

Cannot read property 'match' of undefined

В моем примере я мог бы использовать такой подход с комментариями:

textByLine[24] = textByLine[24].replace(/\/\//g, "");

Но я хочу немногоитерация как эта:

     if (textByLine[i].match(/\/\ import 'core-js/g)) {
textByLine[i] = textByLine[i].replace(/\/\//g, "");
    }

Окончательное решение должно быть в угловых схемах, но я тестирую в узле для более быстрого исправления .. все еще не могу получить его

Попробуйте в nodejs:

 // app.js

const http = require('http');

// Create an instance of the http server to handle HTTP requests
let app = http.createServer((req, res) => {  
    // Set a response type of plain text for the response
    res.writeHead(200, {'Content-Type': 'text/plain'});

    // Send back a response and end the connection
    res.end('Hello World!\n');


      var fs = require("fs");
var text = fs.readFileSync("./polyfills.ts", 'utf8');
//console.log(text)
var exp = "/\/\ import 'core-js/g"
//text = text.replace(/\/\//g, "");
let textByLine = text.split(/\n/);

for (let i = 0; i <= textByLine.length; i++) {
  if (textByLine[i].match(/\/\ import 'core-js/g)) {
    textByLine[i] = textByLine[i].replace(/\/\//g, "");
  }
}



//console.log(textByLine[24].match(/\/\ import 'core-js/g, ""));
// LINES I NEED TO REMOVE COMMENTS
//textByLine[24] = textByLine[24].replace(/\/\//g, "");
/*textByLine[25] = textByLine[25].replace(/\/\//g, "");
textByLine[26] = textByLine[26].replace(/\/\//g, "");
textByLine[27] = textByLine[27].replace(/\/\//g, "");
textByLine[28] = textByLine[28].replace(/\/\//g, "");
textByLine[29] = textByLine[29].replace(/\/\//g, "");
textByLine[30] = textByLine[30].replace(/\/\//g, "");
textByLine[31] = textByLine[31].replace(/\/\//g, "");
textByLine[32] = textByLine[32].replace(/\/\//g, "");
textByLine[33] = textByLine[33].replace(/\/\//g, "");
textByLine[34] = textByLine[34].replace(/\/\//g, "");
textByLine[35] = textByLine[35].replace(/\/\//g, "");
textByLine[36] = textByLine[36].replace(/\/\//g, "");
textByLine[37] = textByLine[37].replace(/\/\//g, "");
textByLine[43] = textByLine[43].replace(/\/\//g, "");
*/
//var newText;

//for (var i = textByLine.length - 1; i >= 0; i--) {
 // newText.join(textByLine[i].toString())
//}



//textByLine[24].replace(/\/\//g, "");
console.log(textByLine.join("\n"));




});

// Start the server on port 3000
app.listen(3000, '127.0.0.1');  
console.log('Node server running on port 3000');  

попробуй на угловом:

 if (options.supportIE11 === 'yes') {
          const content: Buffer | null = tree.read('./src/polyfills.ts');
          let strContent = '';
          if(content) {strContent = content.toString();} else {
           throw new SchematicsException(
             `Pollyfills not found \n`
           );
          }
          const textByLine = strContent.split(/\n/);
          for (let i = 0; i <= textByLine.length; i++) {
           if (textByLine[i].match(/\/\ import 'core-js/g)) {
             textByLine[i] = textByLine[i].replace(/\/\//g, '');
           }
         }

          tree.overwrite('./src/polyfills.ts', textByLine.join('\n'));

         }

Файл pollyfills:

/**
 * This file includes polyfills needed by Angular and is loaded before the app.
 * You can add your own extra polyfills to this file.
 *
 * This file is divided into 2 sections:
 *   1. Browser polyfills. These are applied before loading ZoneJS and are sorted by browsers.
 *   2. Application imports. Files imported after ZoneJS that should be loaded before your main
 *      file.
 *
 * The current setup is for so-called "evergreen" browsers; the last versions of browsers that
 * automatically update themselves. This includes Safari >= 10, Chrome >= 55 (including Opera),
 * Edge >= 13 on the desktop, and iOS 10 and Chrome on mobile.
 *
 * Learn more in https://angular.io/guide/browser-support
 */

/***************************************************************************************************
 * BROWSER POLYFILLS
 */

/** IE9, IE10, IE11, and Chrome <55 requires all of the following polyfills.
 *  This also includes Android Emulators with older versions of Chrome and Google Search/Googlebot
 */

// import 'core-js/es6/symbol';
// import 'core-js/es6/object';
// import 'core-js/es6/function';
// import 'core-js/es6/parse-int';
// import 'core-js/es6/parse-float';
// import 'core-js/es6/number';
// import 'core-js/es6/math';
// import 'core-js/es6/string';
// import 'core-js/es6/date';
// import 'core-js/es6/array';
// import 'core-js/es6/regexp';
// import 'core-js/es6/map';
// import 'core-js/es6/weak-map';
// import 'core-js/es6/set';

/** IE10 and IE11 requires the following for NgClass support on SVG elements */
// import 'classlist.js';  // Run `npm install --save classlist.js`.

/** IE10 and IE11 requires the following for the Reflect API. */
// import 'core-js/es6/reflect';

/**
 * Web Animations `@angular/platform-browser/animations`
 * Only required if AnimationBuilder is used within the application and using IE/Edge or Safari.
 * Standard animation support in Angular DOES NOT require any polyfills (as of Angular 6.0).
 */
// import 'web-animations-js';  // Run `npm install --save web-animations-js`.

/**
 * By default, zone.js will patch all possible macroTask and DomEvents
 * user can disable parts of macroTask/DomEvents patch by setting following flags
 * because those flags need to be set before `zone.js` being loaded, and webpack
 * will put import in the top of bundle, so user need to create a separate file
 * in this directory (for example: zone-flags.ts), and put the following flags
 * into that file, and then add the following code before importing zone.js.
 * import './zone-flags.ts';
 *
 * The flags allowed in zone-flags.ts are listed here.
 *
 * The following flags will work for all browsers.
 *
 * (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
 * (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
 * (window as any).__zone_symbol__BLACK_LISTED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames
 *
 *  in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
 *  with the following flag, it will bypass `zone.js` patch for IE/Edge
 *
 *  (window as any).__Zone_enable_cross_context_check = true;
 *
 */

/***************************************************************************************************
 * Zone JS is required by default for Angular itself.
 */
import 'zone.js/dist/zone';  // Included with Angular CLI.


/***************************************************************************************************
 * APPLICATION IMPORTS
 */

Мне нужно раскомментировать эти строки

// import 'core-js/es6/symbol';
    // import 'core-js/es6/object';
    // import 'core-js/es6/function';
    // import 'core-js/es6/parse-int';
    // import 'core-js/es6/parse-float';
    // import 'core-js/es6/number';
    // import 'core-js/es6/math';
    // import 'core-js/es6/string';
    // import 'core-js/es6/date';
    // import 'core-js/es6/array';
    // import 'core-js/es6/regexp';
    // import 'core-js/es6/map';
    // import 'core-js/es6/weak-map';
    // import 'core-js/es6/set';
    // import 'core-js/es6/reflect';