ngx-monaco-editor-v2

Monaco Editor Component for Angular 2 and above.

• Angular <= 4: v3.x.x
• Angular 5: v5.x.x
• Angular 6: v6.x.x
• Angular 7: v7.x.x
• Angular 8: v8.x.x
• Angular 9: v9.x.x
• Angular 10: v10.x.x
• Angular 12: v12.x.x
• Angular 13: not supported ( best to use 14, otherwise contact author)
• Angular 14: v14.x.x
• Angular 15: v15.x.x
• Angular 16: v16.x.x

Using this Module you can utilize the Monaco Editor as an Angular Component. Feel free to contribute, raise feature requests and make it better.

Supports all the options available in monaco-editor Monaco Editor Options

Demo

https://ngx-monaco-editor-v2.surge.sh/

Setup

Installation

Install from npm repository:

npm install monaco-editor ngx-monaco-editor-v2 --save

Breaking change from v10, is to use monaco-editor next to ngx-monaco-editor-v2 in your package.json file.

For angular version 6 use v6.x.x

npm install ngx-monaco-editor-v2@6.0.0 --save

Add the glob to assets in angular.json

{
  "apps": [
    {
      "assets": [
      { "glob": "**/*", "input": "node_modules/monaco-editor", "output": "/assets/monaco/" }
      ],
      ...
    }
    ...
  ],
  ...
}

For Angular 6 and below, add the glob to assets in .angular-cli.json schema - projects.[project-name].architect.build (to make monaco-editor lib available to the app):

{
  "options":{
        {"assets": [
          { "glob": "**/*", "input": "node_modules/ngx-monaco-editor/assets/monaco", "output": "./assets/monaco/" }

        ],
        ...
        }
    ...
    },
  ...
}

Sample

Include MonacoEditorModule in Main Module and Feature Modules where you want to use the editor component.(eg: app.module.ts):

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';

import { AppComponent } from './app.component';
import { MonacoEditorModule } from 'ngx-monaco-editor-v2';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    MonacoEditorModule.forRoot() // use forRoot() in main app module only.
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule {
}

Create Editor options in component.(eg: app.component.ts)

import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html'
})
export class AppComponent {
  editorOptions = {theme: 'vs-dark', language: 'javascript'};
  code: string= 'function x() {\nconsole.log("Hello world!");\n}';
}

Include editor in html with options and ngModel bindings.(eg: app.component.html)

<ngx-monaco-editor [options]="editorOptions" [(ngModel)]="code"></ngx-monaco-editor>

Include diff-editor in html with options.(eg: app.component.html)

<ngx-monaco-diff-editor [options]="options" [originalModel]="originalModel" [modifiedModel]="modifiedModel"></ngx-monaco-diff-editor>

import { Component } from '@angular/core';
import { DiffEditorModel } from 'ngx-monaco-editor';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html'
})
export class AppComponent {
  options = {
    theme: 'vs-dark'
  };
  originalModel: DiffEditorModel = {
    code: 'heLLo world!',
    language: 'text/plain'
  };

  modifiedModel: DiffEditorModel = {
    code: 'hello orlando!',
    language: 'text/plain'
  };
}

Styling

To match height of container element add height: 100% and wrap in container

<div style="height: 500px">
    <ngx-monaco-editor style="height: 100%" [options]="editorOptions" [(ngModel)]="code"></ngx-monaco-editor>
</div>

Add class to editor tag. (eg. class=“my-code-editor”)

<ngx-monaco-editor class="my-code-editor" [options]="editorOptions" [(ngModel)]="code"></ngx-monaco-editor>

Add styling in css/scss file:

.my-code-editor {
  .editor-container {
    height: calc(100vh - 100px);
  }
}

Set automaticLayout option to adjust editor size dynamically. Recommended when using in modal dialog or tabs where editor is not visible initially.

Events

Output event (onInit) expose editor instance that can be used for performing custom operations on the editor.

<ngx-monaco-editor [options]="editorOptions" [(ngModel)]="code" (onInit)="onInit($event)"></ngx-monaco-editor>

export class AppComponent {
  editorOptions = {theme: 'vs-dark', language: 'javascript'};
  code: string= 'function x() {\nconsole.log("Hello world!");\n}';
  onInit(editor) {
      let line = editor.getPosition();
      console.log(line);
    }
}

Configurations

forRoot() method of MonacoEditorModule accepts config of type NgxMonacoEditorConfig.

import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { BrowserModule } from '@angular/platform-browser';

import { MonacoEditorModule, NgxMonacoEditorConfig } from 'ngx-monaco-editor';
import { AppComponent } from './app.component';

const monacoConfig: NgxMonacoEditorConfig = {
  baseUrl: 'app-name/assets', // configure base path for monaco editor. Starting with version 8.0.0 it defaults to './assets'. Previous releases default to '/assets'
  defaultOptions: { scrollBeyondLastLine: false }, // pass default options to be used
  onMonacoLoad: () => { console.log((<any>window).monaco); } // here monaco object will be available as window.monaco use this function to extend monaco editor functionalities.
  requireConfig: { preferScriptTags: true } // allows to oweride configuration passed to monacos loader
  monacoRequire: (<any>window).monacoRequire // pass here monacos require function if you loaded monacos loader (loader.js) yourself 
};

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    MonacoEditorModule.forRoot(monacoConfig)
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule {
}

Configure JSON Defaults

onMonacoLoad property of NgxMonacoEditorConfig can be used to configure JSON default.

import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { BrowserModule } from '@angular/platform-browser';

import { MonacoEditorModule, NgxMonacoEditorConfig } from 'ngx-monaco-editor';
import { AppComponent } from './app.component';

export function onMonacoLoad() {

  console.log((window as any).monaco);

  const uri = monaco.Uri.parse('a://b/foo.json');
  monaco.languages.json.jsonDefaults.setDiagnosticsOptions({
    validate: true,
    schemas: [{
      uri: 'http://myserver/foo-schema.json',
      fileMatch: [uri.toString()],
      schema: {
        type: 'object',
        properties: {
          p1: {
            enum: ['v1', 'v2']
          },
          p2: {
            $ref: 'http://myserver/bar-schema.json'
          }
        }
      }
    }, {
      uri: 'http://myserver/bar-schema.json',
      fileMatch: [uri.toString()],
      schema: {
        type: 'object',
        properties: {
          q1: {
            enum: ['x1', 'x2']
          }
        }
      }
    }]
  });

}

const monacoConfig: NgxMonacoEditorConfig = {
  baseUrl: 'assets',
  defaultOptions: { scrollBeyondLastLine: false },
  onMonacoLoad
};

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    MonacoEditorModule.forRoot(monacoConfig)
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule {
}

Now pass model config of type NgxEditorModel to Editor Component

@Component({
  selector: 'app-root',
  template: `<ngx-monaco-editor [options]="options" [model]="model"></ngx-monaco-editor>`,
  styles: []
})
export class AppComponent {
  options = {
    theme: 'vs-dark'
  };
  
  jsonCode = [
    '{',
    '    "p1": "v3",',
    '    "p2": false',
    '}'
  ].join('\n');

  model: NgxEditorModel = {
    value: this.jsonCode,
    language: 'json',
    uri: monaco.Uri.parse('a://b/foo.json')
  };
}

Configuration for Electron

If you expose node’s require in your render process, monaco will try to use its NodeScriptLoader and fail to load its files. To presuade it to use its BrowserScriptLoader instead it is necessery to set preferScriptTags to true.

import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { BrowserModule } from '@angular/platform-browser';

import { MonacoEditorModule, NgxMonacoEditorConfig } from 'ngx-monaco-editor';
import { AppComponent } from './app.component';

const monacoConfig: NgxMonacoEditorConfig = {
  baseUrl: 'assets', 
  requireConfig: { preferScriptTags: true }
};

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    MonacoEditorModule.forRoot(monacoConfig)
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule {
}

If for some reason you want to load monaco yourself.

<!doctype html>
<html>

<head>
  <meta charset="utf-8">
  <title>Angular Electron</title>
  <base href="./">

  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="icon" type="image/x-icon" href="assets/icons/favicon.ico">
</head>

<body>
  <app-root></app-root>
  <script>
    // Monaco uses a custom amd loader that over-rides node's require.
    // Keep a reference to node's require so we can restore it after executing the amd loader file.
    var nodeRequire = require;
  </script>
  <script src="assets/monaco/min/vs/loader.js"></script>
  <script type="text/javascript">
    // Save Monaco's amd require and restore Node's require
    var monacoRequire = require;
    require = nodeRequire;
    require.nodeRequire = require;
  </script>
</body>

</html>

You just need to save monaco require function defined in loader.js somewhere and pass it to monacoRequire in configuration.

import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { BrowserModule } from '@angular/platform-browser';

import { MonacoEditorModule, NgxMonacoEditorConfig } from 'ngx-monaco-editor';
import { AppComponent } from './app.component';

const monacoConfig: NgxMonacoEditorConfig = {
  baseUrl: 'assets', 
  requireConfig: { preferScriptTags: true },
  monacoRequire: (window as any).monacoRequire
};

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    MonacoEditorModule.forRoot(monacoConfig)
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule {
}

Links

Monaco Editor
Monaco Editor Options

License

Natan © Mamadou BAH