Highlight code line in monaco editor

[coatless]

demo

var rCode = [
	"hello_world <- function(age) {",
	"   if (age > 30) {",
	"       print('You are old')",
	"	} else { ",
	"       print('You are young!')",
	"   }",
	"}",
	"hello_age(22)",
].join("\n");

var editor = monaco.editor.create(document.getElementById("container"), {
	value: rCode,
	language: "r",
});

var decorations = editor.createDecorationsCollection([
	{
		range: new monaco.Range(2, 1, 4, 1),
		options: {
			isWholeLine: true,
			linesDecorationsClassName: "myLineDecoration",
		},
	},
]);

hello_world <- function(age) {
   if (age > 30) {
       print('You are old')
	} else { 
       print('You are young!')
   }
}
hello_age(22)