Deno.inspect

Converts the input into a string that has the same format as printed by console.log().

const obj = {
  a: 10,
  b: "hello",
};
const objAsString = Deno.inspect(obj); // { a: 10, b: "hello" }
console.log(obj);  // prints same value as objAsString, e.g. { a: 10, b: "hello" }

You can also register custom inspect functions, via the symbol Symbol.for("Deno.customInspect"), on objects, to control and customize the output.

class A {
  x = 10;
  y = "hello";
  [Symbol.for("Deno.customInspect")](): string {
    return "x=" + this.x + ", y=" + this.y;
  }
}

const inStringFormat = Deno.inspect(new A()); // "x=10, y=hello"
console.log(inStringFormat);  // prints "x=10, y=hello"

Finally, you can also specify the depth to which it will format.

Deno.inspect({a: {b: {c: {d: 'hello'}}}}, {depth: 2}); // { a: { b: [Object] } }