Appendix D

JavaScript 常用語法速查

DOM 與事件

const button = document.querySelector("#button");
button.addEventListener("click", () => {
  console.log("clicked");
});

修改畫面

title.textContent = "新的標題";
card.classList.toggle("active");

localStorage

localStorage.setItem("todos", JSON.stringify(todos));
const todos = JSON.parse(localStorage.getItem("todos")) || [];