// Through the options literal, the behaviour of the editor can be easily customized. // Here are a few examples of config options that can be passed to the editor. // You can also call editor.updateOptions at any time to change the options. var editor = monaco.editor.create(document.getElementById('container'), { value: "// First line\nfunction hello() {\n\talert('Hello world!');\n}\n// Last line", language: 'javascript', lineNumbers: 'off', roundedSelection: false, scrollBeyondLastLine: false, readOnly: false, theme: 'vs-dark' }); setTimeout(function () { editor.updateOptions({ lineNumbers: 'on' }); }, 2000);