angular-app-monaco-editor-integration/monaco-config.ts

import { NgxMonacoEditorConfig } from "ngx-monaco-editor-v2";

export function onMonacoEditorLoad() {

  (window as any).monaco.languages.register({id:'java'});

  (window as any).monaco.languages.registerCompletionItemProvider('java',{

    providerCompletionItems:function(){
      var suggestions = [
        {
          label:'simpleText',
          kind: (window as any).monaco.languages.CompletionItemKind.Text,
          insertText: 'simpleText'
        },
        {
          label:'testing',
          kind: (window as any).monaco.languages.CompletionItemKind.Keyword,
          insertText: 'testing(${1:condition})',
          insertTextRules: (window as any).monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet
        },
        {
          label: 'ifelse',
          kind: (window as any).monaco.languages.CompletionItemKind.Snippet,
          insertTest: ['if (${1:condition}) {', '\t$0', '} else {', '\t', '}'].join('\n'),
          insertTextRules: (window as any).monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
          documentation: 'If-Else Statement'
        },
      ];
      return {suggestions: suggestions};
    }
  });

}

export const monacoConfig: NgxMonacoEditorConfig = {
    onMonacoLoad: onMonacoEditorLoad
};