🔰default action

browser ⟩ event ⟩ default action

Many events have a default action associated with them.

• event handlers are usually called before the default behavior takes place.

• call event.preventDefault() to prevent this normal behavior.

// ⭐️ prevent touch screen default actions.
container.addEventListener("touchmove", event => {
        event.preventDefault();
}, {passive: false} );                 // ⭐️ important

🧨 雷區

Depending on the browser, some events can’t be intercepted at all. for example：

• Chrome：ctrl+W or cmd+W (close current tab) cannot be handled by JavaScript.

⭐️ 重點

👥 相關

📗 參考

📘 手冊