const tracks = ["HTML", "CSS", "JavaScript"];

const user = {
  name: "林晨",
  stage: "基础阶段",
};

function sumScores(...scores) {
  // 返回总分
  /*let total = 0
  scores.forEach(item => {
    total = total+item
  })
  return total*/
  return scores.reduce((acc, item) => {
    return acc + item
  }, 0)
}

// 任务：
// 1. 复制 tracks 并新增 "ES6+"
// 2. 基于 user 生成一个 stage 为 "现代 JS" 的新对象
// 3. 调用 sumScores
// 4. 输出结果到 #output
const tracks1 = [...tracks, "ES6+"]
const user1 = {
  ...user,
  stage: "现代 JS"
}
const sum = sumScores(1, 2, 3, 4)
const output = document.getElementById("output")
output.textContent = sum