Cannot process without Compiler

[vulrandier]

Hi,

Iam currently trying to use remark together with angular to parse markdown to mdast...

When doing so I get an error message: Cannot process without Compiler in the browser console...

Before I had some problems that path or process was not defined. So I setup custom-webpack, patched polyfill and added some lines to packages.json...

If someone has some experience with angular and remark, it would be kind to provide some help :)

Here some Information:

Actual Code

import { Component, Input, OnInit } from '@angular/core';

import * as unified from 'unified'
import * as markdown from 'remark-parse'


@Component({
  selector: 'app-markdownrenderer',
  templateUrl: './markdownrenderer.component.html',
  styleUrls: ['./markdownrenderer.component.sass'],
})
export class MarkdownrendererComponent implements OnInit {
  @Input() data: string;

  constructor() {}
  
  ngOnInit(): void {

    unified().use(markdown).process('# Hello world!', function (err, file) {
      // console.error(report(err || file))
      console.log(String(file))
    })

  }
}

Angular version (ng v)

Package	Version
@angular-devkit/architect	0.1002.0
@angular-devkit/build-angular	0.1002.0
@angular-devkit/core	10.2.0
@angular-devkit/schematics	10.2.0
@angular/cli	10.2.0
@schematics/angular	10.2.0
@schematics/update	0.1002.0
rxjs	6.6.3
typescript	4.0.5

Package.json

Here I added browser, node types and path and process...

{
  "name": "ng-md-ba",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "~10.2.0",
    "@angular/common": "~10.2.0",
    "@angular/compiler": "~10.2.0",
    "@angular/core": "~10.2.0",
    "@angular/forms": "~10.2.0",
    "@angular/platform-browser": "~10.2.0",
    "@angular/platform-browser-dynamic": "~10.2.0",
    "@angular/router": "~10.2.0",
    "path": "^0.12.7",
    "process": "^0.11.10",
    "remark": "^13.0.0",
    "remark-parse": "^9.0.0",
    "rxjs": "~6.6.0",
    "stream": "0.0.2",
    "tslib": "^2.0.0",
    "unified": "^9.2.0",
    "zone.js": "~0.10.2"
  },
  "devDependencies": {
    "@angular-builders/custom-webpack": "^10.0.1",
    "@angular-devkit/build-angular": "~0.1002.0",
    "@angular/cli": "~10.2.0",
    "@angular/compiler-cli": "~10.2.0",
    "@types/jasmine": "~3.5.0",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "^12.19.3",
    "codelyzer": "^6.0.0",
    "jasmine-core": "~3.6.0",
    "jasmine-spec-reporter": "~5.0.0",
    "karma": "~5.0.0",
    "karma-chrome-launcher": "~3.1.0",
    "karma-coverage-istanbul-reporter": "~3.0.2",
    "karma-jasmine": "~4.0.0",
    "karma-jasmine-html-reporter": "^1.5.0",
    "protractor": "~7.0.0",
    "ts-node": "~8.3.0",
    "tslint": "~6.1.0",
    "typescript": "~4.0.2"
  },
  "browser": {
    "fs": false,
    "os": false,
    "path": false,
    "process": false
  }
}

Angular.json

Here I changed build and serve to custom webpack...

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "ng-md-ba": {
      "projectType": "application",
      "schematics": {
        "@schematics/angular:component": {
          "style": "sass"
        }
      },
      "root": "",
      "sourceRoot": "src",
      "prefix": "app",
      "architect": {
        "build": {
          "builder": "@angular-builders/custom-webpack:browser",
          "options": {
            "customWebpackConfig": {
              "path": "./custom-webpack.config.js",
              "mergeStrategies": {
                "externals": "replace"
              }
            },
            "outputPath": "dist/ng-md-ba",
            "index": "src/index.html",
            "main": "src/main.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "tsconfig.app.json"
          }
        },
        "serve": {
          "builder": "@angular-builders/custom-webpack:dev-server",
          "options": {
            "browserTarget": "ng-md-ba:build"
          }
        },
        "extract-i18n": {
          "builder": "@angular-devkit/build-angular:extract-i18n",
          "options": {
            "browserTarget": "ng-md-ba:build"
          }
        },
        "test": {
          "builder": "@angular-devkit/build-angular:karma",
          "options": {
            "main": "src/test.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "tsconfig.spec.json",
            "karmaConfig": "karma.conf.js",
            "assets": ["src/favicon.ico", "src/assets"],
            "styles": ["src/styles.sass"],
            "scripts": []
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": [
              "tsconfig.app.json",
              "tsconfig.spec.json",
              "e2e/tsconfig.json"
            ],
            "exclude": ["**/node_modules/**"]
          }
        },
        "e2e": {
          "builder": "@angular-devkit/build-angular:protractor",
          "options": {
            "protractorConfig": "e2e/protractor.conf.js",
            "devServerTarget": "ng-md-ba:serve"
          },
          "configurations": {
            "production": {
              "devServerTarget": "ng-md-ba:serve:production"
            }
          }
        }
      }
    }
  },
  "defaultProject": "ng-md-ba"
}

Polyfill.ts

Here I added process

/**
 * 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
 */

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

/**
 * 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';
 *
 * 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__UNPATCHED_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
 */


(window as any).global = window;
global.Buffer = global.Buffer || require('buffer').Buffer;
global.process = require('process');

(edited by @\wooorm to put background info in a details)

[wooorm]

remark-parse parses markdown, remark-stringify serializes it!

If you want HTML instead, you want to use remark-rehype to transform mdast to hast, then use rehype-stringify to serialize the hast to get HTML!

[vulrandier]

Hi thanks for your answer.

I want a mdast tree via remark-parse... so I can render it on my own...

I was inspired by this article: https://medium.com/wizdm-genesys/rendering-markdown-in-angular-37750d124247

[vulrandier]

and i dont get it to generate the tree... :/ because of this compiler error message...

[wooorm]

To get a tree, use .parse. For more info on the phases of the process, see unified’s readme. Specifically, it’s description: https://github.com/unifiedjs/unified#description

[vulrandier]

Ok thank you.
I see what you mean. Actually a compiler generates output like html and needs to be attached too via .use()
So I have to use .parse instead of .process if i only want the tree.

I think this helped and thank you very much for your quick answers.

My last problem is that I have to figure out why there is no process.cwd according to the console.

[wooorm]

Please open new discussions for new questions. Also, please search discussions and issues for whether your question has already been answered