I'm having trouble using eval in my js file (class).

When I develop a code globally it works (Ex 1).

Now when I use eval inside the class it doesn't work (Ex 2)

Code Ex 1 ->

var s = "function teste() {console.log('testando')}"
eval(s)

this.teste();

**Code Ex 2 -> **

class Oi {

  constructor() {
    this.s = ""
    this.t = ""
  }
  
  run(){
    this.s = "function teste() {console.log('testando')}"
    eval(this.s)
    
    this.teste();
  }
}

let o = new Oi();
o.run();