JavaScript 用例

const element = document.querySelector("#box");

// Note: only class name, without the '.'
element.classList.add("class-name");

function greetUser() {
  return "Welcome to code to go!";
}

let result = greetUser();

console.log(result);

let str = "uvais codes";

str = str[0].toUpperCase() + str.substring(1);

const element = document.querySelector("#box");

//change background-color
element.style.backgroundColor = "red";

const object = {
  id: 1,
  name: "Leanne Graham"
};

JSON.stringify(object);