如何在vue中正确使用'includes‘

data() {
  return {
    myArray: [1, 2, 3, 4, 5],
    myString: "Hello, world!"
  }
}

methods: {
  checkArray() {
    if (this.myArray.includes(3)) {
      console.log("myArray包含元素3");
    } else {
      console.log("myArray不包含元素3");
    }
  },
  checkString() {
    if (this.myString.includes("world")) {
      console.log("myString包含子字符串'world'");
    } else {
      console.log("myString不包含子字符串'world'");
    }
  }
}

<button @click="checkArray">检查数组</button>
<button @click="checkString">检查字符串</button>